. Bulletin. Natural history; Natural history. April 1983 Pechuman, Webb, & Teskev: Difiera of Illinois—Tabanidae 57 May and have been collected until late August. C. univittatus is an eastern and cen- tral species, extending from the pan- handle of Florida to New Brunswick and west to Minnesota and Louisiana (Fig. 147). This is an abundant and widespread species in Illinois (Fig. 147). Chrysops upsilon Philip Chrysops upsilon Philip (1950a:458). Type- locality: Georgia, Millen. Moderate size (8 mm); black and yellow; frontoclypeus brown with yel- low in center and short median polli- nose
. Bulletin. Natural history; Natural history. April 1983 Pechuman, Webb, & Teskev: Difiera of Illinois—Tabanidae 57 May and have been collected until late August. C. univittatus is an eastern and cen- tral species, extending from the pan- handle of Florida to New Brunswick and west to Minnesota and Louisiana (Fig. 147). This is an abundant and widespread species in Illinois (Fig. 147). Chrysops upsilon Philip Chrysops upsilon Philip (1950a:458). Type- locality: Georgia, Millen. Moderate size (8 mm); black and yellow; frontoclypeus brown with yel- low in center and short median polli- nose stripe; frontal callus black; tho- rax grayish green in ground color; scutellum dark; abdomen dark brown to black with broad yellow median stripe and short sublateral stripes; apical spot broad (Fig. 71), covering most of the second submarginal cell; hyaline spot generally does not reach second longi- tudinal vein except as subhyaline streak; crossband broad, covering discal cell, reaching hind margin of wing; infus- cation of costal cell paler than that of crossband; both basal cells and fifth posterior cell hyaline. Male with polli- nose stripe on frontoclypeus more ex- tensive than in female, often reaching nearly to oral margin; first basal cell infuscated. Among Illinois Chrysops, upsilon is likely to be confused only with C. univittatus, which lacks pollen on the frontoclypeus; in cases where the pol- len is indistinct, the best character for separation is the color of the costal cell, which is paler than the crossband in upsilon. Larvae are unseparable from those of C. univittatus. In Illinois adults appear in early June and have been collected until mid-September. C. upsilon is a southeastern species, extending from the panhandle of Flori- da to Delaware and west to Illinois and eastern Texas (Fig. 148). In Illi- nois this species has been collected in the southern part of the state (Fig. 148).. Fig. 148.—Distribution of Chrysops upsilon in Illinois and North Americ
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
