THE SEMITROPICAL ARMY WORM. 
59 
at this time were frequently found full of holes, the work of these 
larvae. The following day, July 4, the amaranth was almosl com- 
pletely denuded, illustrating the rapid work of this species when in 
large numbers (see figs. 10, 11). By July 8 the larvae had almosl 
completed their work in the field, after having eaten everything 
clean. Many were full grown and had commenced to enter the 
ground. July 9 the potato field was stripped, the vines were dead 
and dry, and the larvae had almost disappeared. The ground was 
full of pupae, none of them at a greater depth than 4 inches, and in 
IhM 
Pig. 9.— The Bemitropical army worm (Prodenia eridania) ; Work of larvae on "careless 
weed " in potato field; 311 larva? wore on this plant when photographed. (Original, i 
many eases only 2 inches. Upon digging into the hills, it was found 
that they did not average more than four good-sized potatoes to the 
hill, and in many eases these had been rendered useless by the inroads 
of the larva 1 . (This crop averaged small because of Late planting.) 
Many Larvae were found feeding on sweet potatoes at Mr. John M. 
Cheney's place at this time, most of them still in young stages, A 
few fully matured larvae also were found, showing the overlapping 
of the two generations; in fact, observations conducted both in the 
