WILLOW CATERPILLARS. 
567 
After first molt. — Length .22 inch ; shape about as before. The segments that were 
reddish purple during the first stage are now black ; the others white, the tubercles 
small, black; head black; hairs from the dorsal tubercles dark gray, the others 
white. Duration of this period, three days. 
After second molt. — Length .35 inch. 
After third molt. — Length .60 inch. Three dorsal stripes, a broad gray one in the 
middle. 
Ajter fourth molt.— Length I inch when at rest. Color of body yellowish green, 
with a gray dorsal stripe ; under parts grayish brown; the whole body covered with 
fine yellow hairs that spring from the general surface as well as from the tubercles; 
the tubercles scarcely distinguishable from the general surface save that from these 
the hairs are more in clusters ; a few black hairs in place of the former black pencils. 
Head black, the front with the usual pale inverted A ; the sides mottled with black 
and pale brown. Duration four to five days. 
Mature larva. — Length when crawling 1.60 inches, when at rest 1.40 inches. 
(French.) 
p U pa. — Cylindrical, tapering gradually from segment 5 back, the tongue-case ex- 
tending only to the anterior part of segment 5 ; the anterior part of the abdominal 
segments finely punctured; head rounded, mahogany-brown, the wing-cases and 
outer anterior parts darker. Cremaster a series of short hooks extending out later- 
ally. Duration of the period two hundred and sixty-nine to two hundred and seventy- 
five days. Length .80 inch ; to end of wing-cases .40, these extending almost to the 
posterior part of segment 5. (French.) 
22. Apatela oblinita (Abb.-Sm.). 
Abbot states that the larva feeds in Georgia on the willow and cot- 
ton, the moth appearing in April. Grote mentions the willow as its 
food- plant (Papilio, ii, p. 99), while Thaxter states that it feeds on the 
button bush and various meadow plants. 
In his third report as State 
Entomologist of Illinois, Prof. 
S. A. Forbes states that the 
leaves of the willow at Nor- 
mal were generally infested 
both in 1883 and 1884 by the 
l&rvsd of Apatela oblinita, those 
collected July 6 pupating on 
the 11th and emerging on the 
29th. 
"This insect hibernates in 
the cocoon, and seems to be 
either single or double 
brooded, according to lati- 
tude. In Missouri there are 
two broods in a year, by Pro- 
fessor Riley >s account, the 
moths of the first brood escaping from the cocoons in May (the larvse 
resulting appearing chiefly in June) ; and the second brood of moths 
occurring in July and the larvae late in the fall. In the Northeast, the 
Fig. 191. 
-Apatela oblinita,- a. larva; b, cocoon; c, 
moth. Kiley del. 
