78 



PRELIMINARY LIST 



Idioceras perplexas n, sp. 



Near pallidas, differing from that species as fellows: Genae sharply incurved beneath 

 the eyes, then rounded to clypeus, and the clypeus more broadened out towards the tip. 

 Last ventral segment produced on posterior margin very much as in pallidus, but rounded 

 at extreme tip, not truncate. 

 Color pale yellow, unicolorous 

 throughout. This may prove to 

 be only a variety of pallidus but 

 the specimens we have examined 

 seem quite distinct. 



Length of female 6-7.5 mm., of 

 male 5.35-6 mm. Described from 

 two females and one male. 



Fort Collins, August 

 26th on Cottonwood, 

 and September 20tli 

 ovipositing in box-elder 

 (Gillette). Cheyenne 

 Canon, Colorado 

 Springs, August (Tuck- 

 er). 



We have one male of 

 the same structural 

 characters, quite dis- 

 tinctly greenish. Colo- 

 rado Springs, August 

 3d (Gillette). 



Idiocerus prodiictus n. sp. 



Male: Face as long as wide, 

 finely shagreened; clypeus four- 

 fifths longer than broad, much 

 widened towards the rounded 

 apex, basal suture curved; lorae 

 slightly longer and nearly as wide 

 •as the clypeus; genae deeply de- 

 pressed beneath the eyes, lateral 

 margins straight, not attaining 

 tip of clypmis and narrow below 

 the lorae; front nearly one-half 

 longer than wide, a little less than 

 twice the length of clypeus. Ver- 

 tex finely transversely wrinkled, length at middle a half longer than next the eyes, width 

 between the eyes little more than three times the lengtli at the middle, apex rounded, but 

 the angle nearly a right angle. Pronotum slightly more than twice as wide as long and 

 two and one-fifth times as long as the vertex, curvature little less than five-sevenths of 

 the length, disc finely transversely shagreened. Scutellum finely shagreened, trans- 

 verse groove as in interruptus, except that it is more strongly depressed and with several 

 transverse wrinkles just back of it. Color yellowish below, whitish above. Crest of ver- 

 tex with a large black median longitudinal spot, disc whitish with a small black spot on 

 either side next the compound eyes. Pronotum black with the posterior margin and a 

 few small spots «.n disc whitish. Scutellum black with more or less of the lateral margins 



