. Bulletin. Natural history; Natural history. April 1983 Pechuman, Webb, & Teskev: Diitkra of Illinois—Tabanidae 113. Fig. 283.—Distribution of Hybomitra sodalis in Illinois and North America. has been collected at several localities in the northern half of the state (Fig. 283). Hybomitra tetrica hirtula (Bigot) Therioplectes hirtula Bigot (1892:641). Type-locality: Washington Territory. Moderate size (15 mm); blackish; palpi white, rather stout at base; beard white; frons rather wide, widened above; prescutal lobe brown; bifurca- tion with spur vein; abdomen with three rows of gray spots,
. Bulletin. Natural history; Natural history. April 1983 Pechuman, Webb, & Teskev: Diitkra of Illinois—Tabanidae 113. Fig. 283.—Distribution of Hybomitra sodalis in Illinois and North America. has been collected at several localities in the northern half of the state (Fig. 283). Hybomitra tetrica hirtula (Bigot) Therioplectes hirtula Bigot (1892:641). Type-locality: Washington Territory. Moderate size (15 mm); blackish; palpi white, rather stout at base; beard white; frons rather wide, widened above; prescutal lobe brown; bifurca- tion with spur vein; abdomen with three rows of gray spots, sublateral ones sometimes with reddish tinge. Male readily associated with female by spur vein at bifurcation; upper eye facets scarcely diiferentiated; beard with some dark hairs. Collecting in 1979 at the sole recorded locality in Illinois did not produce this species, and since Illinois is well out of its known range, it is possible that the specimens here recorded have an erroneous locality label. The immature stages are unknown. In Illinois adults have been collect- ed in early July. H. tetrica hirtula is a western species, extending from Colorado to Manitoba and west to British Columbia and California, with a disjunct record in Illinois (Fig. 284). This subspecies has been collected only once in Illinois. Illinois records.—Ogle County, White Pines Forest State Park (7 miles W Oregon).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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