574 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 17 
pads. The elytra are folded ventrally but not over the legs. The lateral 
hairs remain on the abdominal segments. 
The sexes of Echocerus cornutus are easily distinguished in the pupal 
stage, the female possessing a pair of appendages on the terminal ab¬ 
dominal segment while the male presents only indistinct elevations in 
this region. 
The Adult. The adult is shining reddish brown in color and has a 
length of about one-eighth of an inch. The head is restricted behind the 
eyes so as to be drawn into to the prothorax nearly to the eyes, is nar¬ 
rower than the thorax and is densely punctured. 
The eyes are dark, deeply emarginated and extend underneath the 
head. The antennae are clavate and sparsely covered with hairs. 
The mandibles of the female are short and of the usual type but the 
mandibles of the males are very conspicuous in that they are broad and 
expanded at the base but as they extend forward they taper to a point, 
being curved distally. Another marked difference between the male and 
the female is the presence of two prominent tubercles in the center of the 
head of the male. 
The pro thorax is rectangular and margined by a deep groove, the an¬ 
terior angles being slightly rounded and the posterior angles sharply 
curved, wider than long, flattened dor sally and densely punctured with 
round pits. 
The middle coxa is without a trochanter, the hind coxa separated, the 
tarsi pubescent beneath with the last joint much elongated. 
Each wing cover has six narrow longitudinal depressions with ridges 
in between. In each depression is a row of shining black punctures, the 
entire under surface of the elytra is also punctured. The posterior 
portion of the abdomen under the elytra is black. 
Life History. The eggs of the beetle were laid singly and within 
twelve hours after copulation. These eggs hatch under a temperature of 
76°F. in ten days. The larva in emerging from the egg appears to 
cut its way from the egg case and emerges through a round opening in the 
end. Preparatory to its first molt, it is inactive and the body seems to 
contract giving the whole a somewhat unnatural aspect. The larval 
skin splits dorsally for its entire length and is usually left away from the 
meal. As soon as the larva passes thru its first molt it commences feed¬ 
ing again. If feeding on germea, the length of the second instar is six 
days, the third instar six days, fourth instar four days, fifth instar nine 
days, sixth instar seven days, eighth instar five days, the ninth and last 
