Lasiocampidae 
lar is not pleasant to 
contemplate. The bets 
way to combat these 
destructive insects is to 
diligently search for 
their webs when they 
first are being formed, 
and to cut off the 
branches to which they 
are attached and burn 
them. By following 
this method carefully, 
their ravages may be 
held in check. 
(2) Malacosoma 
californica Packard, 
Plate X, Fig. 11, $ . 
Syn. pseudoneustria Bois- 
duval. 
The species, which 
is in its habits very 
closely allied to the 
preceding, has its home 
upon the Pacific coast. 
(3) Malacosoma disstria Hubner, Plate X, 
Fig. 9, $ ; form erosa Stretch, Plate X, Fig. 10,6. 
Syn. sylvatica Harris ; drupacearum Boisduval; thoracicoides 
Neumoegen & Dyar; sylvalicoides Neumcegen & Dyar; thoracica 
Stretch; perversa Neumoegen & Dyar. 
The moth is universally distributed through the 
United States and Canada. It appears to be rather 
variable, and a number of subspecies or varietal forms 
have been recognized. Many of the races, if such 
they can be called, differ so little from the typical 
stock that it hardly appears worth while to regard 
the names which have been applied to them as 
other than synonyms. 
The habits of the larvae are almost identical with 
those of the species to which reference has already 
been made. Like them, they prefer to attack the 
3U 
Fig. 189.— 
M. disstria, 
larva. (After 
Riley.) 
Fig. 188. — M. americana. a, lateral view of 
larva; o, dorsal view of larva; c, mass of eggs; 
d, cocoon. (After Riley.) 
i 
