386 GEORGE H. CARPENTER AND MABEL C. MACDOWELL. 
The car do is rather complexly folded, and its line of 
articulation is somewhat curved and oblique. It carries a 
very few spines. The stipes is somewhat quadrilateral in 
outline, carries some short spines on its ventral aspect, and 
some long spines on its external margin. Its surface is also 
enfolded. 
The palp is tliree-segmented, but the segmentation is not 
complete. Both the inner and outer edges bear a few stiff 
spines. 
The galea is slender and pointed, and beset with stiff hairs 
near the apex. Its articulation with the stipes is well marked. 
The lac ini a has a bifid tip, and bears many spines, some 
jof which are peculiarly modified, showing at the tip the 
appearance of incipient branching. Several stages in the 
modification of these spines are shown in fig. 17. In some 
of the specimens examined similar spines were found on the 
galea, though their occurrence there is less usual than on the 
lacinia. 
Labium. (PI. 36, fig. 18.) 
The labium is composed of light coloured transparent 
cuticle. It consists of a broad mentum (mt.) } a narrower 
submentum [sin.), two short, stout palps (Lb. Pip.), and an 
indented ligula (l). The mentum is convex ventrally and beset 
with stiff spines. The submentum is pitted all over with small 
circular depressions, giving it a somewhat honeycomb-like 
appearance. The suture between the mentum and submentum 
is incomplete. 
The close association of the submentum with the neck 
sclerities ( nk.-scl .), recalling the condition in the Orthoptera, 
is another indication of the primitive character of this 
larva. 
Also, on dissecting away the maxillas and labium, we find 
that the head-skeleton is quite continuous beneath them, so 
that the ventral head sclerite, composed of pale, almost trans- 
parent cuticle, has to be removed before the underlying 
