IOWA ACADEMY OP SGIENOES. 
203 
inside the margin before the ocelli, an obscure rectangular mark just on 
either side the center and an oblique spot near the base, brown. Pronotum 
and scutellum faintly lined. Elytra sub-hyaline, nervures light, sometimes 
faintly margined; oblique band reduced to two spots; usually a dark blotch 
in the third apical cell and reflexed nerves lightly margined. Below, dirty 
white; upper half of the face usually dark with white arcs. Tergum with 
four black stripes, outer pair widest at base. 
Genitalia: Ultimate ventral segment of female very long, central fourth 
slightly produced, notched in the center, arcuated and dark colored each 
side of the notch. Male genitalia much enlarged; pygofers enlarged, 
inflated, spoon-shaped, their tips compressed; last tergite much enlarged, 
inflated, compressed laterally and terminally against the pygofers. Valve 
large, acutely angled, plates small, about twice the length of the valve, 
roundingly pointed, distended, and sometimes notched at tip by the sharp 
edge of the pygofers. Described from eighteen specimens. 
The enlargement of the male genitalia, though not peculiar to 
this species alone, is rendered all the more striking from the fact 
that it is ordinarily met with only in the males of short- winged 
forms usually placed in the genus Athysanus^ while long winged 
forms of the same species in that genus have genitalia of normal 
size. The males of this species, however, are all long- winged and 
have constantly deltocephaloid venation and enlarged genitalia. 
This species very much resembles rejlexus, but has a broader 
head, stouter vertex and longer elytra, giving it a linear rather 
than a wedge shape. Specimens have been collected at Ames 
for a number of years and two examples were received from 
Colorado through Professor Gillette. 
Adults have been taken rather sparingly through the last 
half of June, rather commonly through the first week in July, 
and one battered specimen the first of August. No larvae have 
been taken or food plant determined. 
DELTOCEPHALUS REPLEXUS N. SP. 
(PL xxii, Fig. 1.) 
Form very similar to that of albidus, but the vertex is longer, 
narrower and more acutely angled and the elytra more round- 
ing. Light cinereus above, the upper half of the face sharply 
black, lower half white. Length, 4 to 4. 50 mm. Width, 1.75 mm. 
Vertex: Length on middle nearly three times that at eye, nearly twice 
longer than wide, anterior angle acute, tip blunt. Front narrower above 
than in indatus, facial angle slightly more acute; gense moderately full, 
outer angle distinct; lorae only meeting the extreme tip of front, enclosing 
the clypeus. Pronotum short, truncate behind, posterior angles indefinite; 
elytra flaring, without an appendix; costal veinlets reflexed, even more 
strongly than in albidus; third apical cell wedge-shaped, twice larger than 
anal, veins on clavus coalescent through the median third of their length. 
