156 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Larva (plate XX, fig. 2). 



Larva. It has eleven segments, is opaque white, very faintly yellowish 

 at the base of the segments, cylindrical and tapering to a point at the 

 head. They vary from 3 to 6 mm. in length and 1 to 1.5 mm. in diameter. 



The head is retractile into the first segment, is bilobed and each lobe 

 has a very minute tubercle at the apex and on the under side of each lobe is 

 a series of brownish, roughened, transverse lines. Between these lobes 

 are two dark reddish hooklets. 



The anterior spiracles are white, quite small, semi-circular and beaded 

 along the edge ; in some specimens the beads are round, while in other speci- 

 mens they are rounded at the top and pointed at the base; there are ten of 

 these beads to each spiracle. This spiracle is located on the side and at the 

 base of the first segment. Along the lower front edge of the first segment is 

 a narrow roughened area (fig. a). 



Segments four to ten each have a small, ventral fusiform area, on the 

 front edge, which is formed by a series of raised, roughened brown lines. 



On the under side of the last segment, near the middle or anal area, is a 

 large, rugose area which is somewhat semi-circular in form. There is a 

 very small depression on each side of the anal opening. 



The last segment has a shiny, faintly yellowish rectangular depression 

 on the end. Near the middle of this depression are two yellowish-brown, 

 button-shaped, raised, spiracles which vary from nearly round to elliptical. 

 On each of these chitinized plates are three oblique slits. Just above these 

 slits is a small impression like an asterisk, which is concolorous with the 

 larva. The two stigmal plates are separated by a small Y-shaped depres- 

 sion (fig. b). 



Pupa (fig. 3). 



The pupa is brownish-yellow, cylindrical, tapering slightly towards the 

 head where the color is a deeper brown. It is 4.5 mm. in length and 1 .25 mm. 

 in diameter. The entire pupa skin is sharply marked with very narrow, 

 transverse ridges. All the transverse, segmental lines of the larva are 

 visible on the pupa skin, where they appear as very fine rugose surfaces. 

 The end of the last segment has a sharp edge or carina around it forming 

 somewhat of a hexagon; in this hexagonal area are the posterior spiracles 

 which are like those of the larva with the addition of a small stem on the 

 inner side, which points upward and outward. 



The adult emerges by splitting the puparium and forcing its way through 

 this slit. 



