IOWA ACADEMY OP SCIENCES. 
209 
August; third brood of larvae from middle of August until 
the last week in September; third brood of adults from the 
first week in September through October. 
DELTOCEPHALUS CONPIGURATUS UHL. 
(PI. xxiii, Fig. 3.) 
Bull. U. S. Geol. and Geog. Surv., IV, p. 511, 1878. 
This widely distributed species is the largest of the genus in 
America, and though the coloration is often so faint as to leave 
it almost unicolorous above, it may be easily recognized by its 
broad, blunt head as well as by its peculiar genital structure. 
The last ventral segment of the female terminates in an attenu- 
ate bifid black process, and the male plates are strong, broad 
and obliquely truncate. 
In the definitely colored individuals there is a white cross on 
a white margined vertex of fuscous and alternating light and 
fuscous stripes on the pronotum. The nervures of the elytra 
are white, margined more or less strongly with fuscous. The 
elytra vary in length, usually longer than abdomen. A median 
impressed black line on the vertex is never entirely wanting. 
Length, 4.50 to 5 mm. Closely related to D. hoJiemani Zett, but 
with male plates distinctly shorter, and not laterally excavated. 
The iarvm may be separated from sayi by the broader head, 
rounder vertex and stouter form and from any other of the 
striped larvae by the fuscous striated front. It is of a pale 
brown above, with three indistinct stripes and a row of dots 
just inside the narrow light margin on either side of the 
abdomen. Front light, with indistinct fuscous striations. 
This species was first taken in great abundance as full-grown 
larvae and freshly issued adults on May 2nd and 12th. Within 
two weeks the larvse had all disappeared, while the adults were 
very numerous throughout June, and a few were found in July. 
This species occurred with albidus on the field that was 
mowed June 25th, and as recorded for that species, was practi- 
cally exterminated by the process. Though the field was under 
continual observation throughout the remainder of the season 
the only indication of a second brood was the sweeping of a half 
grown larva July 16th. These facts indicate that it has a very 
similar life-history to albidus^ the broods however occurring 
from one to two weeks earlier, the second brood of larvae prob- 
ably appearing the last week in June and continuing through 
July; the second brood of adults from the last week in July 
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