Packard.] 
518 
[Feb. 19, 
hairs, about one- third as long as the body is thick. Besides the 
black head, the two black twin tubercles, and the black suranal 
plate, there are two rows of black slashes along the sides of the 
body, one subdorsal and the other lateral. The thoracic legs are 
black at the ends, and the abdominal legs are dotted with black at 
the extreme tip. 
Recapitulation .-— The changes from the first to the last stages are 
not so marked as usual in this family, and this appears to be due 
to the fact that the mature larvae, though brightly colored, spotted 
and banded, live more or less in tents, out of sight, the young lar- 
vae apparently also adopting a partial life in tents. 
1. In Stage I the cervical shield is well developed, and in Stage 
V, or the last stage, is divided into halves. 
2. The dorsal tubercles on the first and eighth uromeres are 
separate, while in the last stage they are closely contiguous and 
very prominent, while the piliferous warts on the mature larva are 
nearly obsolete. 
3. Stage I already shows traces of longitudinal lines. 
4. The markings (both colorational and structural) of the last 
stage appear at the end of Stage II, and are probably still more 
emphasized in Stage III. 
Dr. Harris, in his “ Treatise*,” quite fully describes the habits of 
this tent-inhabiting caterpillar, remarking, “ When young they 
sometimes fold up one side of a leaf for a nest, and eat the other 
half.” He also fully describes the tent made by the social mature 
larvse, which we have also observed on the poplar, “made of a 
single leaf folded or curled at the sides, and lined with a thin web 
of silk.” He also states that “ the caterpillars go out to feed upon 
the leaves near to their nests.” It thus appears that from early 
larval life the caterpillars live in much the same way as the fully 
grown larvae, dwelling in tents, and, unlike most Notodontians, 
continuing to live socially in “ swarms of twenty or more,” until 
they disperse, preparatory to pupation. While feeding exposed, 
they are probably not eaten by birds, as their colors and markings 
serve as “ danger signals.” 
LIFE-HISTORY OF DATANA INTEGERRIMA G. AND R. 
The following notes were written out from an examination of 
greatly enlarged drawings, made by Mr. Bridgham at Providence. 
The figure of the fourth stage agrees with Mr. Beutenmiiller’s de- 
