28 
COLORADO EXPERIMENT STATION. 
nervures near the posterior margin conspicuously white. The ground 
color of the vertex is more reddish and the light markings are more 
distinct on account of darker brown colors bordering them. The 
valve of the genital pieces is triangular, narrow at the base, with 
the apex slender and acute ; the plates are short and stout and ex- 
ceed the valve but little. [See fig. 4.] 
Described from numerous examples of both sexes taken by the 
writer during the months of April, May, September and October, 
sweeping native plants and in the following localities in the state : 
Fort Collins, Bellvue, Manhattan and Calhan. 
Variety rufus . — Of this species I have three females that differ 
from the others in being of a salmon color throughout, with the 
markings indistinct. 
DELTOCEPHALUS ATROPUNCTA, n. sp. 
Pale yellow in color, vertex strongly produced with a black 
spot at apex. Length m. m. 
Vertex strongly produced, acute, slightly elevated towards the 
apex, disc slightly convex between the eyes, not at all depressed, 
length equal to one and one-half times the distance between the 
eyes. Color light yellow shaded with brown towards the apex, 
paler between the eyes, median stripe and two cross bars whitish, 
median dark line obsolete except at the base ; ocelli black. Front 
long and narrow, nearly parallel sided, pale yellow in color with 
fuscous cross lines ratlier indistinct in one specimen and nearly 
black in another. Clypeus rather long, sides parallel, tip truncate 
and strongly produced beyond the lorse, pale yellow in color, infus- 
cate towards the tip ; lor^e and genae pale yellow, except that the 
latter have a black streak under either eye near the antenna, a 
smaller black spot beneath the middle of the eye and a black color- 
ation in the very narrow portion below the lorse ; entire length of 
the face fully one-fourth greater than the breadth. 
Pronotum light yellow, feebly striated posteriorly, length a lit- 
tle more than one-third of the width. Scutellum pale yellow. 
Elytra pale yellow without markings, reaching the middle of the 
third abdominal segment. Tergum yellow with a black spot mid- 
way on the sides of the first segment and indistinct transverse rows 
of brown spots on tlie succeeding segments. Venter yellow, with 
the last segment, only, brownish in one example, and in another the 
middle of the hind margin is nearly black. The last ventral seg- 
ment is large, posterior angles somewhat acute and hind margin 
somewhat produced, and very similar to that of the preceding 
species. It is readily separated from labiata by the greater length of 
the face, the more produced vertex and the black spot at the tip of 
the latter. 
Described from two females, one taken by Emma A. Gillette at 
