148 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



ridge, broadly rounded. This ridge is only on the basal half of the last 

 segment, the sides of the apical half are broad at the base and terminate 

 into a sharp edge or carina at the apex. At the base of the first segment , 

 near the outer corners, are two small, yellowish brown spiracles, which 

 are elliptical, chitinous plates with three, parallel, oblique slits which are 

 darker on the edges and point towards the apical corners of the first segment. 



Near the apex of the lateral ridge, is a microscopic spiracle on all seg- 

 ments except the first, second and last. 



The last segment is nearly twice as long as the preceding ones and 

 terminates into a blunt point. In the middle of the dorsum of the last 

 segment are two transverse grooves or folds which are interconnected by 

 two smaller folds, which are oblique and slightly curved. From these 

 transverse grooves are two longitudinal, faint grooves which are irregular 

 and terminate at the apex of the last segment. 



The last segment has two much larger spiracles, located near each basal 

 corner. Each spiracle is nearly circular and are much darker yellowish- 

 brown than the anterior pair. Around the edge of each is a band or border 

 ((imposed of 40 compressed ringlets, resembling a cross-section of grains of 

 corn. The area inside of this band is pale grayish brown. Below the 

 upper edge, which is towards the cephalic end of the larva, is a crenulate 

 opening reaching half way around this area. See plate xvii, fig. 3. 



The under side of the head has two pairs of proclinate bristles, one pair 

 at the base and the other at the middle. 



Segments one, two and three each have one pair of yellowish-brown 

 bristles on the ventral side. Each bristle is located in the middle of the 

 segment and about one-fourth the transverse width from the lateral edge. 



The ventral side of the last segment has a pair of yellowish-brown 

 bristles near the apex and a pair on the lateral edge located at about the 

 apical fourth. At the base of this segment is a groove which forms a 

 rectangular surface with a slight depression near each end. From this 

 rectangular surface are two grooves running parallel, half way to the apex, 

 then converging to a point at the apex. 



The anal opening is located at the base of this last mentioned surface. 



Pupa (plate XVII, fig. 2). 



The pupa is 25 mm. long and 6 mm. diameter at the base of the abdomen ; 

 thorax nearly 7 mm. diameter. 



Head and thorax are dark reddish-brown. Abdomen much lighter and 

 of a brick-red color. The whole pupa is rugose, the abdomen is more 

 sharply marked, especially along the apical edge of the segments, \\lirn> 

 it is reticulate. 



Head. Near the apex arc two large horn-like projections. Belmv are 

 two more projections, each having one large and one small tooth or prong. 

 In back of and slightly below each apical projection, is a bifid liuiiu'i-nl 

 spiracle, opening on the caudal side. The ends are bifurcate, shiny and 



