Pupae of Some Maine Species of Notodontoidea 55 



is very thick in this region ; face-parts decidedly elevated at 

 the proximal ends of the antennae, clypeal region, labrum and 

 eye-pieces ; a furrow present indicating the lateral parts of the 

 fronto-clypeal suture ; labrum almost semicircular in outline ; 

 antennae reaching the caudal margin of the wings, the distal 

 end of each curved slightly mesad ; maxillae reaching the cau- 

 dal margin of the wings, their proximo-lateral angles not ex- 

 tending as far as the eye-pieces ; labial palpi never exposed ; 

 prothoracic leg reaching cephalad between the sculptured eye- 

 piece and antenna, and at least seven-eighths the length of the 

 wings, their femora never exposed; mesothoracic legs sometimes 

 reaching the caudal margin of the wings, but usually a little 

 shorter; thoracic segments unusually short, the entire thorax 

 less than one-fourth the total length of the body ; mesal length 

 of prothorax two-thirds that of the mesothorax, and the meta- 

 thorax one-half of this length ; mesothoracic spiracle with its 

 caudal margin abruptly elevated, then a gradual slope towards 

 the base of the wing; abdomen coarsely punctate, at least on 

 eight segments ; dorsal furrow never present between the ninth 

 and tenth segments ; abdominal spiracles strongly produced, 

 the openings somewhat lenticular ; one deep spiracular furrow 

 present over each spiracle on the fifth segment, the outer margin 

 strongly chitinized ; cremaster longer than broad, slightly bi- 

 furcate at tip often showing a fine seta on each lateral margin 

 near the proximal end. 



This genus has only one common species, Paleacrita vernatd 

 which is common in the eastern part of the United States and 

 Canada. 



PALEACRITA VERNATA Peck. 



The Spring Canker-worm. Fig. 3, C and D. 



Color yellowish or reddish brown; head, thorax, and ap- 

 pendages slightly roughened with indeterminate transverse stria- 

 tions ; a portion of the front more strongly elevated than the 

 remainder of the face-parts ; antennae showing transverse im- 

 pressions ; abdomen coarsely punctate on segments 1 to 8, rarely 

 on the remaining segments ; abdomen considerably arched in 

 the region of the first three segments giving the pupa a hump- 

 backed appearance; spiracular furrows with their transverse 



