78 
PRELIMINARY LIST 
Idiocerus perplexus n. sp. 
Near pallidus, differing from that species as follows: 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 
t 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 20th 
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 productus 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 clypeus 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 length 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 an disc whitish. Scutellum black with more or less of the lateral margins 
