PUPAE OF SOMF. MAINE SPECIES OF NOTODONTOIDEA 73 



caudal margin which has a small semicircular depressed area 

 in the middle ; abdomen finely but not coarsely punctate, the 

 punctures slightly larger along the cephalic margin of the seg- 

 ments ; spiracles lenticular, slightly depressed ; cremaster with 

 the lateral margins subparallel, usually 1 mm. in length, some- 

 times shorter : a rugose area at base bounded cephalad by a nar- 

 row, irregular carinate ridge. 



Length 18 to 22 mm. ; greatest width 6 mm. 



The larvae of this species feed on beech, maple, and many 

 other trees. They often become very numerous and during the 

 years 1908 and 1909 became a serious pest in Maine and New 

 Hampshire. A description of the larvae and their life history 

 is given in Bulletin 161 of the Maine Agricultural Experiment 

 Station. The larvae when full grown pupate in an earthen cell, 

 or among leaves at the base of the trees. 



HETEROCAMPA BILINEATA Packard. 



Color usually chestnut brown, sometimes darker; surface 

 smooth and polished ; head, thorax and appendages almost 

 smooth, with a few slightly depressed lines ; maxillae always 

 reaching the caudal margin of the wings ; pits along the caudal 

 margin of the mesonotum usually eleven, occasionally only ten; 

 mesothoracic spiracle with a very narrow elevation adjacent to 

 the caudal margin, and caudad of this a slight depression ; ab- 

 domen rather coarsely punctate on the cephalic margin, the 

 punctures smaller and farther apart on the remainder of the 

 segment ; abdominal spiracles lenticular but not depressed ; cre- 

 master with the lateral margins distinctly converging to the tip, 

 usually less than 1 mm. in length, never with a rugose area at 

 base. 



Length 16 to 20 mm. ; greatest width 5 mm. 



The larvae of this species have been collected in Maine 

 from oak, elm and linden. The larva enters the soil to pupate, 

 where it spins a loose web of silk to which the particles of soil 

 adhere, forming a sort of earthen cocoon. 



Family PLATYPTERYGIDAE. 



This family consists of four^genera, and pupae of only two 

 of these have been seen. The larvae of Oreta rosea were col- 



