202 
IOWA ACADEMY OF SCIENCES. 
round spots; posterior femora with a long dark line; middle femora with a 
transverse band below. These at rest complete the ventral stripe across 
the thorax. 
This exceptionally well marked form may be easily recog- 
nized by its clear white ground color. It has been collected at 
Ames for several years but has not been received from any 
other locality. 
The larvae were first taken May 26th. They were then nearly 
f all-grown and remained abundant for two weeks, disappearing 
by the middle of June. The adults were taken the 3d of June, 
and by the middle were exceedingly abundant, continuing in 
decreasing numbers up to the middle of July. The only appear- 
ance of a second brood was the capture of an adult male August 
18th. 
The field where this species occurred had been closely mowed 
June 25th, and the inference is that eggs had all been deposited 
in the grass stems above the point of cutting and must have 
been almost totally destroyed by the mowing. From these 
facts and through comparison with the life- history of other 
species their life-history may be, with reasonable certainty, 
completed as follows: Second brood of larvae from the second 
week in July on to the middle of August; adults through 
August and September. 
No definite food habit can be assigned, as there was a rich 
variety of native grasses where it occurred so abundantly. It 
was not, however, found on a field of Andropogon scoparius nor 
where the Bouteloas predominated. Insectary tests to ascertain 
its food plant failed because of its great susceptibility to Sporo- 
trichum in confinement. 
DELTOCEPHALUS INFLATUS N. SP. 
(PI. xxii, Fig. 2.) 
Form intermediate between that of albidus and conjlguratus. 
Color very similar to covfiguratus usually a dark blotch in the 
third apical cell. Length, 4.25 to 4,75 mm. Width across cen- 
ter of costae, 1.75 mm. 
Vertex scarcely twice as long on middle as next the eyes, one and one- 
fourth times as long as broad. Front more than twice as wide at ocelli as 
at clypeus; facial angle acute, as in albidus; front less inflated. Pronotum 
shorii, weakly angled; elytra flaring, variable in length, usually exceeding 
the abdomen, venation similar to albidus, costal veinlets not as strongly 
reflexed, shorter. 
Color, dirty yellowish-white to light fuscous with faint markings, tip of 
vertex ivory white, narrowly, interruptedly margined with dark, a line just 
