. Bulletin. Natural history; Natural history. April 1983 Pechuman, Webb, & Teskev: Diitera ok Illinois—Tabanidae 49 C. macquarti is a widespread eastern species, extending from northern Flori- da to Maine and west to Wisconsin and Louisiana (Fig. 134). In Illinois this species is rare, having been collect- ed from only five localities (Fig. 134). Chrysops mitis Osten Sacken Chrysops mitis Osten Sacken (1875:374). Type-locality: Canada, Hudson Bay (lectotype). Large species ( mm); black; frontoclypeus with median pollinose stripe; pleura with grayish or pale yel- lowish pile; abdomen ent
. Bulletin. Natural history; Natural history. April 1983 Pechuman, Webb, & Teskev: Diitera ok Illinois—Tabanidae 49 C. macquarti is a widespread eastern species, extending from northern Flori- da to Maine and west to Wisconsin and Louisiana (Fig. 134). In Illinois this species is rare, having been collect- ed from only five localities (Fig. 134). Chrysops mitis Osten Sacken Chrysops mitis Osten Sacken (1875:374). Type-locality: Canada, Hudson Bay (lectotype). Large species ( mm); black; frontoclypeus with median pollinose stripe; pleura with grayish or pale yel- lowish pile; abdomen entirely dark; no apical spot or hyaline triangle (Fig. 59); crossband broad, covering discal cell, narrowly or not at all reaching hind margin of wing; basal half of both basal cells infuscate; base of fifth posterior cell infuscate. Male with con- siderable dilute infuscation in anal area of wing. This species is close to C. ater in general appearance, and some speci- mens can scarcely be differentiated. The characters in the key will general- ly separate these two species. The egg mass is in three tiers, re- sembling those of C. ater and C. cincticomis. The larvae (similar to Fig. 135.—Distribution of Chrysops mItIs in North America. 103) have been collected on the edges of ponds and streams and in swamps, usually in a highly organic substrate (Pechuman 1972; Teskey 1969). In Illinois adults appear in early June and have been collected only un- til the middle of June. C. mitis is a northern species, ex- tending from New York to Labrador and west to Idaho and Alaska (Fig. 135). In Illinois this species is restricted to the northeast corner of the state. Illinois Records.—Kankakee County, Wichert; Lake County, Antioch, Sand Lake. Chrysops moechus Osten Sacken Chrysops moechus Osten Sacken (1875: 387). Type-locality: District of Co- lumbia (lectotype). Moderate size ( mm); yellow and black; frontoclypeus shining yellow; frontal callus usually black; thorax greenish
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