266 FAMILY VII. — CORISCHLE. 



notum alone. Fracker (1918, 269) states that: "Throughout 

 its range the adults are numerous in late summer along road- 

 sides and the edges of woods on goldenrod and other fall flow- 

 ers. The young have been bred on Astragalus in Colorado, ap- 

 pearing the middle of May." 



195 (324). CORISCUS CONSPERSUS (Montandon), 1893, 49. 



Form of eurinus, averaging smaller. Head, apical third of prono- 

 tum, under surface and femora black, feebly bronzed ; elytra, basal por- 

 tion of pronotum and tibiae, except apex, brownish-yellow; basal joint of 

 tarsi in great part yellow; membrane dull yellow mottled with fuscous 

 dots; color of antennae as in eurinus; tip of scutellum and a spot near 

 front angle of connexival and ventral segments, yellow. Pronotum slightly 

 longer than wide, side margins straight, just visibly convergent from 

 base to apex, their edge with carina very fine, entire; disk very finely and 

 sparsely punctate, without antemedian impression as in eurinus, but with 

 a vague median impressed line along apical two-thirds; humeri ob- 

 tuse, rounded, a little more prominent and upcurved than in eurinus. 

 Length, 10 — 12 mm.; width, 2 — 2.3 mm. 



Lake and Kosciusko counties, Ind., June 28 — Aug. 23. Oc- 

 curs with eurinus on various plants growing in dry sandy locali- 

 ties. Ranges from Quebec and New England west to Dakota 

 and Colorado ; not as yet recorded south of New Jersey. Frack- 

 er (1918, 270) states that: "In Wisconsin and neighboring 

 states it is much more common than cur in us. They mate in 

 September and October and the winter is apparently passed in 

 the egg stage." As noted under eurinus this species is readily 

 separated from that by the much finer and sparser punctuation 

 of pronotum. In eurinus both head and pronotum are clothed 

 with numerous rather coarse erect brown or black hairs. In 

 conspersus these are very few, but each one of the fine punc- 

 tures, as well as those of elytra and abdomen, bears a minute 

 appressed yellow hair. 



Fracker has named the black form of eurinus var. obesus, and 

 the melanic smaller form of conspersus, having the membrane 

 infuscate, not dotted, as var. infuscatus, but these names, like 

 those of all others based on color, have little value, as there are 

 too many intergrading forms to which neither the specific nor 

 varietal name will strictly apply. He has also reduced to a 

 southern race or variety of conspersus the A. rufescens Barber 

 described (1911a, 30) from Arizona, since the genitalia are the 

 same as in the northern conspersus. 



