Spiriverpa senex Walker

• Main Author: Webb, Donald W.
• Format: Text
• Language: unknown
• Published: Zenodo 2005
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Therevidae; Spiriverpa; Spiriverpa senex; Canada; Hudson; Webb; Saunders; Stripe; Clayton; Bleue; Fulton; Hobbs; Burlington; Thunder Bay; Wakefield; Blackburn; Aldrich; Davey; Litchfield; Covey; Sugar Loaf; Brown Hill; Seal Cove; Newfoundland; Prince Edward Island
• Online Access: https://dx.doi.org/10.5281/zenodo.6264610; https://zenodo.org/record/6264610

Spiriverpa senex (Walker) senex Walker (1848: 224 orig. desc.), Cole (1923: 129 reprint of orig. desc.; 1965: 354 cat.) ( Thereva ); Irwin and Lyneborg (1981 a: 216 listing, comb. change) ( Spiriverpa ). Nova Scotia, Canada. Holotype male in BMNH. candidata Loew (1869: 8 orig. desc.) ( Thereva ); Irwin and Lyneborg (1981 a: 216 listing, comb. change) ( Spiriverpa ). Type locality northern Wisconsin. Holotype female in MCZ. New Synonymy. The holotype female of Thereva senex Walker was compared with females in copula with males that were determined to be conspecific with the holotype male of Thereva candidata Loew. Thereva candidata is placed in synonymy with T. senex based on the setae lateral to the antennal base being white; the epandrium in lateral view (Fig. 44) tapered posteriorly to a broad medial point; and the ventral lobe possessing short, stout ventral setae (Fig. 44). Diagnosis. Like Spiriverpa bella and S. cinerascens in having the male ommatidia of uniform size; halter knob pale yellow; inner gonocoxal setae yellow; ventral apodeme extending beyond anterior margin of dorsal apodeme (Fig. 47); female common duct longer than furca (as in Fig. 33); spermathecal ducts originating from posterolateral margins of spermathecal sac (as in Fig. 33). Like S. bella in having setae on the male and female frons and parafacial white and the gonostylus lacking basodorsal spines. It differs from S. bella in having the femora dark reddish brown; the ventral lobe (Fig. 45) with short, stout ventral setae; the setae on the female mesonotum black, erect intermixed with yellow subappressed setae; and having setae on the median lobe of female tergite 9. Redescription of male . Morphometric variation (n= 10). Body Length 6.8–8.9, 8.4 mm Head. Length 0.84–1.06, 0.99 mm. Ommatidia of uniform size. Frons pruinescence silver; setae white. Antenna dark reddish brown, scape and pedicel black, pruinescence gray, dense on scape and pedicel; Antenna/head length 0.76–0.88, 0.81; scape length 0.16– 0.22, 0.19 mm, length/width 1.1–1.8, 1.3, scape/pedicel length 1.9–2.8, 2.3, scape/flagellum width 0.6–0.9, 0.8, setae on scape white, elongate; pedicel length 0.08–0.10, 0.09 mm, length/width 0.4–0.7, 0.6; flagellum length 0.42–0.50, 0.45 mm, length/width 2.1–2.7, 2.4, flagellum/scape length 1.9–2.9, 2.4. Parafacial setae white. Maxillary palpus cuticle pale yellow; length 0.42–0.55, 0.48 mm, length/width 6.3–8.3, 7.5; setae whitish yellow. Thorax. Macrosetae 3–4 np, 2 sa, 1 pa, 1–2 dc, 2 sc. Mesonotum black, pruinescence gray, dense; vittae black, pruinescence gray; setae black intermixed with white setae along lateral and anterior margins. Setae on postpronotal lobe white. Pleura and scutellum pruinescence gray, dense; setae white. Wing. Length 5.8–6.3, 6.2 mm, length/width 2.7–3.2, 3.1; membrane hyaline, pterostigma pale brown; cell m 3 open. Halter knob pale yellow, stalk dark brown. Legs. Coxal setae white. Femora dark reddish brown, pruinescence gray, dense; ventral filiform setae white. Tibiae dark yellow, reddish brown apically. Tarsomere 1 dark yellow, darker apically, 2–5 reddish brown. Abdomen. Cuticle dark brown, pruinescence gray on tergites 1 and 7, tergites 2–4 dark brown anteriorly, pruinescence gray along posterior and lateral margins, tergites 5–6 with anterior dark brown area forming medial triangle; dorsal and lateral setae white. Terminalia . Tergite 8 (Fig. 43), setae yellow, absent medially on posterior margin. Sternite 8 (Fig. 45) quadrate, anterior margin slightly expanded laterally, sides tapered posteriorly; setae dark brown. Epandrium (Fig. 43), posterior margin yellow, glabrous, posterolateral margin broadly pointed; lateral view (Fig. 44) oblong, tapered posteriorly to broad medial point. Gonocoxite ventral view (Fig. 45), broad basally, tapering posteriorly to broad truncate margin, setae pale yellow, lateral view (Fig. 46), posterior margin with short medial and ventral projection, inner gonocoxal process pale yellowish brown, narrow, clavate apically, extending distal to posterior margin of gonocoxite, apical setae yellow; ventral lobe (Fig. 45) with short, stout ventral setae. Gonostylus lacking basodorsal spines. Aedeagus with ventral apodeme (Fig. 48) clavate anteriorly, anterior margin truncate, ending beyond anterior margin of dorsal apodeme; distiphallus lateral view (Fig. 49) curved ventrally; ejaculatory apodeme (Fig. 47) in cross­section flattened dorsoventrally. Redescription of female. Similar to male except as follows. Morphometric variation (n= 10). Body length 6.8–9.3, 7.8 mm Head . Length 0.92–1.12, 1.01 mm. Frons pruinescence pale brown, silver ventrally with brown oval area dorsolaterally; setae dark reddish brown becoming white lateral to antennal socket. Antenna/head length 0.77–1.12, 1.01; scape length 0.18–0.24, 0.20 mm, length/width 1.1–1.6, 1.4, scape/pedicel length 2.3 –3.0, 2.5, scape/flagellum width 0.67 – 0.80,0.73; pedicel length 0.07–0.10, 0.08 mm, length/width 0.12–0.18, 0.16; flagellum length 0.40–0.52, 0.46 mm, length/width 1.8–2.6, 2.3, flagellum/scape length 1.9–2.5, 2.3. Parafacial setae pale yellow. Maxillary palpus length 0.36–0.58, 0.45 mm, length/width 5.3–9.7, 7.7. Thorax . Macrosetae 2–3 np, 1–2 sa, 1 pa, 1–2 dc, 2 sc. Dorsocentral vitta with narrow median brown stripe; setae on mesonotum black, erect intermixed with yellow subappressed setae. Setae on postpronotal lobe dark reddish brown intermixed with white setae. Wing. Length 5.7 –7.0, 6.3 mm, length/width 2.7–3.5, 3.1; cell m 3 closed at wing margin. Abdomen. Pruinescence gray dense, tergites 2–4, and 6 with broad dark brown anterior fascia, extending posteromedially; tergite 5 with small anteromedial dark brown triangle; dorsal and lateral setae white, appressed, becoming black on posterior segments. Terminalia . Setae on median lobe of tergite 9 dark reddish brown. Furca (as in Fig. 33), length 0.56 mm, width 0.40 mm. Common duct longer than furca. Spermathecal ducts originate from the posterolateral corners of spermathecal sac. Biology. Spiriverpa senex has been handnetted in a sandy area amongst jack pine, in cutover sugar maple woods, in a poison sumac swamp, in a dry mixed forest, in a fen, in sand dunes, on Solidago sp. and Pinus sp., and in alfalfa and amongst red clover; by sweeping in forest and dune vegetation; with Malaise traps in a jack pine sandy area; and with ultraviolet and mercury vapor lights. Adults were collected in April–September and November–January. Larvae have been sieved from compost and muck soil and from a cabbage and raspberry patch. Distribution. Spiriverpa senex has been collected from Georgia to Newfoundland west to Oklahoma and Manitoba (Fig. 52). Specimens Examined. Type specimens. The holotype female of Thereva senex Walker (BMNH Type Number 241986) was collected in Nova Scotia, Canada (no locality information on holotype specimen). The holotype male of Thereva candidata Loew (MCZ Type Number 10679) was collected in northern Wisconsin by Kennicott (no locality information of holotype specimen). Other Specimens. CANADA. MANITOBA . 3.2 km NE Treesbank, along Souris River [49.667, ­ 99.6], 11.VIII. 1993, Gallaway, B., 1 female MEI 136380 (CNC); Aweme [49.717, ­ 99.6], 9.VII. 1911, Criddle, E., 1 male MEI 0 12818 (ANSP); Victoria Beach [50.702, ­ 96.563], 13.VII. 1926, Brooks, G. S., 1 male MEI 0 78110 (DEBU); 7.VII.1928, 1 male MEI 0 80830 (MCZ). NEW BRUNSWICK . Pokemouche [47.667, ­ 64.883], 8.VII. 1940, McDunnough, J., 1 male MEI 125919 (CNC); Walley, G. S., 3 males MEI 125920 ­ 2 (CNC); Kouchibouguac National Park [46.858, ­ 64.975], 23.VI. 1977, Wood, D. M., 1 male MEI 125903 (CNC); 10.VII. 1977, McAlpine, J. F., 1 male MEI 125904 (CNC); 11.VII. 1977, Miller, S. J., 2 females MEI 125950 ­ 1 (CNC); 6.VII. 1978, Lyons, D. B., 1 female MEI 125965 (CNC); 14.VII.1978, 1 female MEI 125964 (CNC). NEWFOUNDLAND . St. George's, Stephenville Bay [48.428, ­ 58.481], 1 male MEI 112693 (USNM). NOVA SCOTIA . Petite Riviere [44.233, ­ 64.433], 12.VII. 1935, McDunnough, J., 1 male MEI 125924 (CNC); 8 km N South Harbour, Sugar Loaf [46.945, ­ 60.487], 22.VI. 1983, Borkent, A., 1 female MEI 125972 (CNC); Riverton [45.517, ­ 62.667], 1 female MEI 125958 (CNC); S Harbour Beach, 25–29.VI. 1983, Teskey, H. J., 1 female MEI 125971 (CNC), dry mixed forest; 29.VI. 1983, Vockeroth, J. R., 1 female MEI 125966 (CNC), mixed dry mesophytic woods; Tracadie [45.617, ­ 61.667], 27.VII. 1939, McDunnough, J., 1 male MEI 125918 (CNC). Colchester County: Truro [45.367, ­ 63.267], 4.VIII.1917, 1 female MEI 125949 (CNC); 26.VIII.1921, 1 female MEI 125948 (CNC). Cumberland County: Highway 23, 3.VI. 1998, Kondratieff, B., Baumann, R., Phillip, R., male MEI 107553 (CSUC). Halifax County: Lawrencetown [44.65, ­ 63.35], 19–20.VII. 1967, Wood, D. M., 1 male MEI 125939 (CNC); Inverness, Little Narrows [45.98, ­ 61.072], 10–11.VII. 1975, Fairchild, G. B., 1 male MEI 0 12781 (FSCA). ONTARIO . 8.1 km E Ottawa, Mer Bleue [45.4, ­ 75.5], 27.VII. 1966, Munroe, D. D., 1 female MEI 125962 (CNC); Angus [44.289, ­ 79.889], 6.XII. 1986, Edwards, C. J., 1 male MEI 0 78118 (DEBU); Blackburn [45.433, ­ 75.55], 16.VI.1941, 1 female MEI 125943 (CNC); 13.VI. 1951, Walley, G. S., 1 male MEI 125914 (CNC); Bothwell [42.633, ­ 81.867], 13.VI. 1925, Walley, G. S., 1 male MEI 0 12872 (IRCW); Bourget [45.441, ­ 75.158], –. IX. 1972, Valiquette, J., 1 female MEI 0 79621 (CNC), sifted, raspberry patch; Brown Hill [44.217, ­ 79.333], 21.VII.1976, 1 male MEI 0 78112 (DEBU); Burlington [43.317, ­ 79.8], –. VI. 1919, Huckett, H. C., 3 males MEI 0 12823 (MEI), 0 12849 (CUIC), 146270 (ZMUC); Cambridge [43.35, ­ 80.31], 6.VI. 1986, Lippert, E. A., 1 male MEI 0 78119 (DEBU), Malaise trap; Chatham [42.4, ­ 82.183], 26.VII. 1954, Davey, K. G., 1 female MEI 125959 (CNC), alfalfa; Cumberland [45.52, ­ 75.42], 2.XI. 1970, Idema, R. M., 1 male MEI 0 79623 (CNC), sifted; Damascus [43.917, ­ 80.483], 2.VI. 1976, Innes, E. A., 1 female MEI 0 78114 (DEBU); East. R., 1.VII., Akey, B. K., 1 female MEI (DEBU); Fort Erie [42.9, ­ 78.933], 4.VII.1910, 1 female MEI 126001 (CAS); 10.V.1911, 1 female MEI 126004 (CAS); Georgian Bay, Thunder Bay Beach, –. VII.1944, 1 female MEI 125999 (CAS); Grimsby [43.195, ­ 79.54], 29.VII. 1915, Caesar, L., 1 female MEI 0 0 3764 (FSCA); Guelph [43.55, ­ 80.25], 5.VI. 1974, Mason, P. G., 1 male MEI 0 78117 (DEBU); 5.VII. 1978, Barber, K. N., 1 male MEI 0 78115 (DEBU); 8.IV. 1985, Alguire, D., 1 female MEI 0 78122 (DEBU); Harrow [42.03, ­ 82.92], 24.VIII. 1975, Umphrey, G. J., 1 male MEI 0 78116 (DEBU); London [42.99, ­ 81.23], 1896, 1 male MEI 0 80849 (MCZ); –VI. 187?, Saunders, W., 1 male MEI 0 78099 (DEBU); Manitoulin Island, Carter Bay dunes [45.6, ­ 82.15], 30.VI. 1999, Marshall, S. A., 1 male MEI 159655 (DEBU); Mer Bleue [45.4, ­ 75.5], 25.VI. 1937, Hobbs, G. A., 1 male MEI 125910 (CNC); Millgrove [43.338, ­ 79.961], 3.VII. 1986, Work, L., 1 male MEI 0 78121 (DEBU); Normandale [42.717, ­ 80.317], 8.VII. 1923, Walley, G. S., 1 female MEI 125954 (CNC); Ottawa [45.417, ­ 75.7], 14.VII. 1962, Heming, B. S., 1 female MEI 0 78111 (DEBU); 20.V.1982, 1 male MEI 0 79622 (CNC), sifted, compost soil; 1–5.VII. 1987, Cumming, J. M., 1 female MEI 0 79610 (CNC); Ottawa, near Uplands Airport [42.412, ­ 75.702], 6–12.VII. 1987, Cumming, J. M., 2 males MEI 079614­5, 4 females MEI 079611­ 3 0 79616 (CNC), Malaise trap; 26.VII.1987, 1 female MEI 136379 (CNC), Malaise trap; Ridgeway [42.883, ­ 79.05], 5.VII. 1908, Van Duzee, M. C., 1 male MEI 126005 (CAS); 24.IX.1910, 1 female MEI 126000 (CAS); 12.VI.1913, 1 female MEI 126003 (CAS); 19.VII.1916, 1 male MEI 125915 (CNC); 15.VII.1917, 1 female MEI 126002 (CAS); Simcoe [42.84, ­ 80.3], 9.VII. 1915, Spencer, G. J., 4 males MEI 003765­ 6 (FSCA), 078095­ 6 (DEBU); St. Thomas [42.783, ­ 81.183], 16.V. 1921, Spencer, G. J., 1 male MEI 159657 (DEBU); 5.VIII. 1924, D., H. G., 1 male MEI 125938 (CNC); Strathroy [42.95, ­ 81.633], 29.VI. 1922, Wood, A. A., 1 female MEI 0 78093 (DEBU); 2.VII. 1922, Hudson, H. F., 2 females MEI 125941, 125944 (CNC); 2.VII. 1924, Hudson, H. F., 1 male MEI 125907 (CNC); 3.VII. 1924, Hudson, H. F., 1 male MEI 125906 (CNC); 14.VI.1927, 1 female MEI 125945 (CNC); 24.VI. 1928, Hudson, H. F., 1 male MEI 0 78094 (DEBU); Thunder Bay [48.406, ­ 89.263], 29.VI. 1931, Parish, H. S., 1 male MEI 112712 (USNM); –. VII.1943, 1 male MEI 112634 (USNM); Toronto [43.667, ­ 79.417], 20.VII.1890, 1 female MEI 112639 (USNM); 30.V.1896, 1 female MEI 0 75366 (CSUC); 7.VI. 1919, Bigelow, N. K., 1 male MEI 0 80839 (MCZ); 7.VI.1919, 1 female MEI 0 80831 (MCZ); 22.VI. 1925, Milne, L., 2 females MEI 125956 ­ 7 (CNC); 24.VI. 1926, Oakley, E. C., 1 male MEI 0 76722 (DENH); 21.VII.1927, 1 male MEI 113171 (USNM); Toronto, Glen Rouge Park [43.667, ­ 79.417], 9.VIII. 1982, Arnaud, Jr., P. H., 3 females MEI 126012 ­ 4 (CAS); Unthoff, 14.VII. 1923, Curran, C. H., 1 male MEI 125909 (CNC); Vienna [42.683, ­ 80.8], 27.VII. 1987, Tendall, B., 1 male MEI 0 78123 (DEBU). Essex County : Harrow [42.034, ­ 82.917], 4.VII. 1985, Wood, D. M., 1 female MEI 0 79617 (CNC), poison sumac swamp; Leamington [42.05, ­ 82.6], 7.VI. 1929, Milne, L. J., 9 males MEI 125926 ­7, 125930­2, 125935­ 7 (CNC), 146268 (ZMUC); 9.VI. 1929, Milne, L. J., 3 males MEI 125928, 125933­4, 1 female 125942 (CNC); 10.VI.1929, 1 female MEI 146145 (ZMUC). Lambton County: Port Franks [43.22, ­ 81.886], 18.VII. 1995, Stead, K, 1 male MEI 159656 (DEBU); 4–8.VII. 1996, Skevington, J. H., 2 females MEI 159664, 159666 (DEBU); 25– 31. VII.1996, 1 female MEI 159665 (DEBU); 31 – 6. VIII.1996, 1 female MEI 159662 (DEBU), Malaise trap; Richmond subdivision [43.22, ­ 81.886], 20.VIII. 1994, Stead, K., Rider, A., 1 female MEI 159659 (DEBU), Hg vapor light; Karner Blue Sanctuary, Port Franks [43.217, ­ 81.9], 4–8.VII. 1996, Skevington, J. H., 1 female MEI 159663 (DEBU), Malaise trap. Middlesex County : –. 6.VI. 1994, Larson, B., 1 male MEI 159658 (DEBU), cutover sugar maple woods. Norfolk Region : Haldimand, Manester Tract [42.755, ­ 80.883], 8.VII. 2000, Buck, M., 1 female MEI 159661 (DEBU); 15.VI. 2001, Buck, Paiero, McKendry, 1 female MEI 159660 (DEBU); Manester Tract, 6 km NNW St. Williams [42.717, ­ 80.437], 30.VI. 2000, Marshall, S. A., 1 male MEI 159654 (DEBU). Wentworth County : Beverly Township, 0.4 km E County Road 39, Concession 2 [43.3, ­ 80.15], 26.VII. 1960, Idema, R. M., 1 male MEI 0 79608 (CNC), Malaise trap; 28.VII.1960, 1 female MEI 0 79609 (CNC), in Malaise trap. PRINCE EDWARD ISLAND . North Murray River, Seal Cove campground [46.153, ­ 62.649], 16.VII. 1990, Roberts, R. H., 1 female MEI 128423 (UCFC); Prince Edward Island National Park, Brackley Beach [46.425, ­ 63.192], 29.VII. 1941, Freeman, T. N., 1 male MEI 125940 (CNC). QUEBEC. 5 km N Beauceville [46.2, ­ 70.783], 2–7.VII. 1990, Gagne, R. S., 1 male MEI 0 90486 (UMRM), mixed forest; Abbotsford [45.4378, ­ 72.8839], 23.VI. 1937, Shewell, G., 1 female MEI 125946 (CNC); Chateauguay [42.377, ­ 73.759], 1.VII.1899, 1 female MEI 0 80854 (MCZ); Covey Hill [45.018, ­ 73.777], 23.VI. 1924, Walley, G. S., 1 male MEI 125925 (CNC); Duchesnay [49.1667, ­ 65.9167], 27.VII. 1947, Lambert, R., 1 male MEI 125913 (CNC); Fort Coulonge [45.85, ­ 76.733], 28.VII. 1919, Beaulne, J. I., 1 male MEI 125917 (CNC); Gaspe Bay [48.767, ­ 64.283], 18.VII. 1931, Aldrich, J. M., 1 female MEI 112701 (USNM); Hammingford, 8.VI. 1925, Hammond, G. H., 1 male MEI 125916 (CNC); Hull [45.45, ­ 75.75], 13.VI.1914, 2 females MEI 0 12858, 0 12863 (CUIC); Knowlton [45.22, ­ 72.51], 1.VII. 1936, Walley, G. S., 1 female MEI 125955 (CNC); Lanoraie [45.966, ­ 73.216], 20.VI. 1915, Beaulne, J. L., 1 male MEI 125912 (CNC); Wakefield [45.65, ­ 75.94], 6.VIII. 1922, McDunnough, J., 1 female MEI 125947 (CNC); La Verendrye Provincial Park, mile 61, Route 58 [48.104, ­ 90.367], 21.VIII. 1965, Wood, D. M., 1 female MEI 125963 (CNC); Kamouraska District: Parke Reserve, 8.VIII. 1957, Mason, W. R. M., 2 males MEI 0 70382 (NYSM), 112604 (USNM), 3 females 125952 (CNC), 0 70376, 0 70380 (NYSM); 9.VI. –, 1 male MEI 0 70126 (NYSM); 1.IX. –, 1 male MEI 0 70144 (NYSM); 11.VI.1895, 1 female MEI 113172 (USNM). UNITED STATES. COLORADO. Jones, C. R., 1 female MEI 0 75377 (CSUC). CONNECTICUT . Hartford County: East Windsor Hill [41.86, ­ 72.604], 17.VI., Parker, H. L., 1 male MEI 112595 (USNM); South Windsor, Nutmeg [41.824, ­ 72.622], 26.VI. 2000, Townesmith, A., 1 male MEI 134671 (UCMS). Litchfield County: 2.2 km NW Gaylordsville, New Milford [41.66, ­ 73.499], 6.VIII. 1991, Maier, C. T., 1 male MEI 0 78666 (CAES); Canaan [42.027, ­ 73.33], 21.VI.1929, 1 female YPM 105164 (PMNH); 30.VIII. 1952, Stone, A., 1 female MEI 112700 (USNM); New Milford [41.577, ­ 73.409], 8.VIII. 1989, Maier, C. T., 1 female MEI 0 78665 (CAES), fen; 12.VII. 1989, Maier, C. T., 1 male MEI 111950 (CAES), fen. New Haven County: 1.6 km S Mount Carmel [41.41, ­ 72.906], 24–25.VI. 1981, Maier, C. T., 1 female MEI 0 78653 (CAES), Malaise trap, 2 nd­growth forest. Tolland County: Tolland, 0.5 km SW of Junction of New Road and Grandt Hill Road, Kollas Orchard [41.871, ­ 72.369], 259 m, 3.VIII. 1995, Maier, C. T., 1 male MEI 111945 (CAES); Storrs [41.808, ­ 72.25], 31.VII. 1974, Nouss, S., 1 male MEI 125697 (UCMS). Windham County: Windham, Windham cedar bog [41.7, ­ 72.158], 85 m, 3.VIII. 1995, Wagner, Merhoff, 1 female MEI 125698 (UCMS); Putnam [41.915, ­ 71.909], Klots, A. B., 1 male MEI 113018 (MEI). DISTRICT of COLUMBIA: 1 female MEI 0 80859 (MCZ). GEORGIA. Clarke County: Whitehall Forest [33.885, ­ 83.358], 22–25.V. 1979, Turnbow, Jr., R. H., 1 male MEI 0 12784 (FSCA), flight trap. Clarke County: 26–30.V. 1980, Smith, C. L., 1 female MEI 136886 (UGCA), Malaise trap. Fulton County: Atlanta [33.763, ­ 84.423], 5.VI. 1932, Fattig, P. W., 1 male MEI 112583 (USNM). Oconee County: Bogart [33.949, ­ 83.535], 250 m, 2.V. 1972, Lavallee, A., 1 male MEI 0 12901 (UGCA). Rabun County: Clayton [34.869, ­ 83.405], 610 m, 18–26.V. 1911, Bradley, J. C., 1 male MEI 0 12837 (CUIC). ILLINOIS. Boone County: Belvidere [42.255, ­ 88.84], 1.VII. 1949, Slater, J. A., 1 male MEI 0 12828 (WSU); 7.VIII.1950, 1 male MEI 0 12829, 1 female 0 12832 (WSU). Brown County: 11.3 km N Versailles [39.987, ­ 90.656], 17.VI. 1977, Webb, D. W., 1 female MEI 0 11276 (INHS). Clark County: Dolson Township, Clarksville, Rocky Branch [39.468, ­ 87.765], 14.VI. 1933, Frison, Ross, 1 female MEI 0 11315 (INHS). Henderson County: 4.8 km E Oquawka [40.932, ­ 90.904], 30.VIII. 1989, Lisowski, E. A., 1 female MEI 115624 (INHS). Lake County: W : Published as part of Webb, Donald W., 2005, A revision of the Holarctic genus Spiriverpa Irwin and Lyneborg (Diptera: Therevidae: Therevinae), pp. 1-56 in Zootaxa 816 on pages 36-38, DOI: 10.5281/zenodo.170604 : {"references": ["Walker, F. (1848) List of the specimens of dipterous insects in the collection of the British Museum. The British Museum of Natural History, London 1, 229 pp.", "Cole, F. R. (1923) A revision of the North American two-winged flies of the family Therevidae. Proceedings of the United States National Museum, 62, 1 - 140.", "Irwin, M. E. & Lyneborg, L. (1981 a [1980]) The genera of Nearctic Therevidae. Illinois Natural History Survey Bulletin, 32, 193 - 277.", "Loew, H. (1869) Diptera Americae septentrionalis indigena. Centuria octava. Berliner Entomologische Zeitschrift, 13, 1 - 52."]}