278 
below it a lateral process (/%.); z., the infraspiracular tubercle bear- 
ing about eight hairs, but no sete; f/., the planta; s., the clavate 
seta. 
The hairs are more numerous than before, nearly concealing the 
body, much as in Stage V. 
Stage [/7.—Length, 5 mm. Of the same color as before, and © 
with no noteworthy change in appearance. 
It molted again July 25-26, the length of the stage being about 
nine days. 
Stage 7V.—Length, 7-8 mm. The larva only differs from that 
of the preceding stage in all the hairs being white, and in the 
woolly or finely spinulated ones being thicker. 
It molted August 3, the length of the stage being about 7-8 days. 
Stage ViLength, 9-10 mm. Same as before, but the hairs 
have grown a little thicker (see Fig. 7, a, 0). 
Iam uncertain whether the larve molted again before the final 
-ecdysis, but Aug. ro-12 they had become 15 mm. long, and were 
the same as before, but with more long hairs in proportion to the 
short forked ones. This is perhaps the end of Stage V. 
This stage lasted about ten days, as they molted again Aug. 22— 
23, and some as late as Aug. 30. 
Last Stage (V7).—Length, of body alone, 20 mm.; but including 
all the hairs before and behind 30 mm.; breadth of body, 10 mm. 
Mature larval characters being acquired only at the last molt, it is 
now entirely different in shape and color from the preceding stages. 
The hairs on the anterior third of the body are s/atfe-gray, behind _ 
reddish brown, and they are so dense and fine as to lie upon the 
body and entirely conceal it; they rise into four longitudinal 
ridges. The head is not now visible, the head-end is broader than 
the tail end, with overarching hairs, and a few longer scattered 
hairs on the front and side of the thoracic segments, and a few long 
brown hairs on the posterior end ; none of these longer hairs are as 
long as the body is thick, and none of the short barbed stinging 
hairs are to be seen through the dense pile of simple hairs. (See also 
Lintner’s description, and my own in Report V, U. S. Hut. Com- 
mission on Forest and Shade Tree Insects, p. 139.) 
UnusuaL NUMBER OF ABDOMINAL LEGS IN THE LARVA. 
In the American Naturalist for July, 1885, pp. 714, 715, we 
