. Bulletin. Natural history; Natural history. April 1983 Pec:hiiman, Wkbb, & Teskk-i : Diimkra of Illinois—Iabanidal 53 tergites 2-6 with lateral brown band; apical spot broad (Fig. 65), covering second submarginal cell; hyaline trian- gle does not reach second longitudinal vein; crossband broad, covering discai cell, reaching hind margin of wing; first and second basal cells partly infuscate; fifth posterior cell infuscate. Male with apical spot more extensive, often nearly surrounding hyaline tri- angle, which may be reduced to pale band or series of spots; both basal cells infuscated on
. Bulletin. Natural history; Natural history. April 1983 Pec:hiiman, Wkbb, & Teskk-i : Diimkra of Illinois—Iabanidal 53 tergites 2-6 with lateral brown band; apical spot broad (Fig. 65), covering second submarginal cell; hyaline trian- gle does not reach second longitudinal vein; crossband broad, covering discai cell, reaching hind margin of wing; first and second basal cells partly infuscate; fifth posterior cell infuscate. Male with apical spot more extensive, often nearly surrounding hyaline tri- angle, which may be reduced to pale band or series of spots; both basal cells infuscated on most of basal half. This species is related to flavidus but can be readily separated from flavidm by the characters given in the key. Larvae (Fig. 98) have been collected from wet mud and organic debris in ponds and small lakes (Goodwin 1972; Tidwell 1973). In Illinois adults appear in mid-July and have been collected until late August. C. reicherti is a southeastern species, extending from southern Florida to Del- aware and west to Illinois and eastern Texas (Fig. 141). In Illinois this spe- cies has been collected only in the southernmost part of the state (Fig. 141). Chrysops sackeni Hine Chrysops sackeni Hine (1903:42). Type- locality: Ohio, Sandusky. Moderate size ( mm); black and yellow; frontoclypeus shining yellow; frontal callus usually yellow, often bordered with black or brown, occa- sionally black; abdominal markings not in form of stripes, black spot on sec- ond segment nearly joins with that on first segment, second and third ster- nites with black sublateral spots; apical spot narrow (Fig. 66), extending part- ly into second submarginal cell, at its origin slightly wider than marginal cell; hyaline triangle broad, not reaching second longitudinal vein; crossband broad, covering discai cell, not reaching hind margin of wing; both basal cells hyaline; fifth posterior cell partly infuscate. Male usually with pale mark- ings less extensive; both basal cells par
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