[June 1884. BULLETIN. BROOKLYN ENTOM. SOC. VOL. VII. 15 
‘The eggs according to Mr. Koebele are laid in bunches of from 1 
to 10 on the bark of the tree. Of course with their long exposure the 
large majority are destroyed by their enemies. 
The Zarva is elongated, tapering towards both ends, is generally 
rounded above, and somewhat flattened below. The head ‘s generally 
flattened, with the front nearlv horizontal, so the mouth parts are pro— 
jected forward, and is often divided at the apex. The abdomen is gen— 
erally provided with protuberances on each segment; is largest at the 
8th segment, which is marked generally with a dorsal lunule or protu- 
berance, as is often the 11th. Generally the larve have curious scurfly 
fringes running in a substigmatal line, and coming next the flattened 
portion of the abdomen. Guenee seems to think they may serve the 
purpose of assisting the larva to cling more tenaciously to the surface 
upon which it rests. From repeated observations, I have been unable 
to see any such use made of them, and movyeover they have no 
sucking disks, and seem to be devoid of muscular mobility. The larva 
may be said to have 16 legs, though according to Prof. French’s obser- 
vations, in the earlier stages of larval history, the two abdominal pairs are 
nearly obsolete, and in some species as in micronympha, (_/ratercula Gt.) 
they remain so, and in the early stages may not exist at all. In all the 
species the larvae are semi loopers, hunching up the back in walking. 
The spiracles are as usual oval, fringed with hair within, and present, so 
far as I have observed. no variation. 
The larva is arboreal and nocturnal. It lies concealed and quies- 
cent during the day under or in the crevices of the bark, or in the grass 
at the base of the tree or shrub on which it feeds. I have noticed that 
the larva often returns to the same place of concealment day after day, 
following probably a silken thread left asa guide. The larve of the 
same species are somewhat variable during the different stages of devel- 
opment, the head being comparatively larger, the body flatter, the seg- 
ments much more nearly of the same size, and the abdominal legs with 
a greater lateral projection in the earlier stages than in the final one. 
There is also a decided variation in coloration, and in the abdominal 
protuberances, In thesame stage, there is in my observation much 
vatiatidn in the same species in the ground color, and in the size and 
distinctness of the markings and protuberances. I believe the larva is 
somewhat mimetic, and to an extent approximates the color of the bark 
of the tree on which it feeds. The larva has at least 4 moults during its 
history. Prof. French records that cara and amatrix go through 5 each, 
