Lasiocampidae 



lar is not pleasant to 

 contemplate. The best 

 way to combat these 

 destructive insects is to 

 diligently search lor 

 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. 1 1, <5 . 



Syn. psetidoticustria Bois- 

 duval. 



The species, which 

 is in its habits very 

 closely allied to the 

 preceding, has its home 



Fu;. 18S.— J/, americaita. a, lateral view of 

 larva; d, dorsal view of larva; c, mass oi' eggs; 

 (/, cocoon. (After Riley.) 



Fig. 189.— 



M. diss Mil, 

 larva. (After 

 Riley.) 



upon the Pacific coast. 



(3) Malacosoma disstria Hubner, Plate X, 

 Fig. 9, 6 ; form erosa Stretch, Plate X, Fig. 10 , <? . 



Syn. sylvatica Harris ; dnipacearnin Boisduval ; thomcicoides 

 Neumcegen & Dyar ; sylvaticoides Neumregen & Dyar ; tJuvacica 

 Stretch ; peiuersa Neumcegen & 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 



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