REPORT OF THE STATE ENTOMOLOGIST 1912 43 
The full-grown larva, as stated above, resembles that of the true 
army worm and may be best distinguished therefrom by the nar- 
rower head with its inverted Y-shaped mark well shown in the 
accompanying illustration. 

Fig. 3 Fall army worm. a, Head of larva; b, c, surface of larval skin 
showing microscopic markings. (After Forbes, 23d Rep’t, Ins. Ill. 1905) 
The following descriptions of a half-grown larva and a full- 
grown one were drafted from living material. 
Larva, half grown. Length one-half inch. Head shining black 
dorsally, the genae yellowish; clypeus fuscous yellowish and bord- 
ered on each margin by a distinct whitish line which is produced 
posteriorly over the head and forms a well-defined median line 
extending nearly to the posterior. extremity. Labrum yellowish, 
labial palpi dark brown, antennae short, dark. Cervical shield shin- 
ing black with distinct median and sublateral white lines. Body 
with the dorsal submedian areas a variably mottled chocolate brown 
and yellowish brown. This area is margined by a yellowish white 
lateral line. Laterally there is a broad stripe of dark chocolate 
brown variably marked with whitish and light brown and margined 
ventrally with a yellowish white stigmatal line. There is an indis- 
tinct substigmatal line, the substigmatal and ventral area being a 
variable yellowish brown; dorsally and laterally there are the usual 
series of large, shining, dark brown spiracles bearing short, black 
hairs; suranal plate shining black; truelegs shining black, prolegs 
fuscous yellowish. 
A lighter specimen of about the same size, evidently recently 
molted, shows little of the characteristic markings described above, 
the head being yellowish transparent, the cervical shield and tuber- 
cles mostly light brown. The lighter longitudinal lines are only 
faintly indicated. 
