DYAR: LARVAE OF THE HIGHER BOMBYCES. 
133 
radiating crown. On thorax a rudimentary wart represents iib and a 
single seta represents iii, but obscured by the coating of short, fine 
secondary hairs with which the whole sub ventral region is covered. 
Arsilonche albovenosa, Goetze. 
Warts large, many haired, perfectly normal in arrangement for the 
Arctiidae as well as for the present family; on thorax, iii represented 
by a single seta; no secondary hairs. 
This type is present in a considerable number of the Apatelidae. 
In the present species warts i and ii form a square on joint 12 which 
is not the case in the Arctians; but it is not universal in the Apatelidae 
either. The hairs may be both stiff and spiny as in Apatela sperata , 
intermediate as in this species, or soft as in Clidia geographica and 
more markedly in Moma orion. 
Simyra dentinosa, Freyer. 
Like the preceding type, but wart iv on abdomen very small, rudi¬ 
mentary. Hairs from the warts numerous, stiff; softer and finer in 
S. nervosa. 
Demas coryli, Linn. 
Warts large and distinct except iv on the abdomen which is absent; 
vi small. On the thorax iib and iii absent; no secondary hairs. Some 
of the warts bear pencils of long spinulose hairs besides the ordinary 
ones, producing a certain resemblance to some Lymantriidae, which 
is probably the cause of the reference of Demas to that family by 
English authors. The American D. propinquilinea is almost iden¬ 
tical with this larva. 
Panthaea coenobita, Esp. 
Warts rather small but all present on abdomen. Secondary hairs 
present, but not uniformly distributed, on thorax forming tufts above 
wart ia+ib, producing a fallacious resemblance to the structure of 
the lymantriid section. The dorsal warts bear short pencils more 
specialized than in Demas, and the thoracic region is curiously colored 
with large black patches, probably only exposed as a response to 
attack. These black patches are separated by hair collars, which is 
the reason for this curious development of secondary hair tufts. It 
thus appears to be adaptive and without phylogenetic significance. 
Moreover, these hairs do not arise from a wart area, but from the 
skin. 
In the American P. furcilla the abdominal hair pencils from joints 
5 and 12 (wart ii) are much longer than in P. coenobita and there 
