9 



along the segments of the thorax and the head. The tenth abdom- 

 inal segment bears six very long setae, two dorsal, two lateral and 

 two ventral. 



The body of the full-grown larva is fusiform, about 1.2 mm. in 

 length and about .3 mm. in breadth, while the width of the head 

 is about .1 mm. The antennae (Plate IV., fig. 27) are seven-seg- 

 mented, somewhat separated at their base and rather thick for 

 their length. Their color is usually darker than that of the body, 

 often nearly black, and the segmentation beyond the fourth seg- 

 ment is more distinct than in the immature larva. The first four 

 segments are nearly equal in thickness, the third and fourth nearly 

 equal in length, and each is as long as the first and second seg- 

 ments together. The last three segments are much smaller, the 

 fifth one being the shortest. The spines are arranged much as in 

 the younger stage. The third segment is distinctly ringed, and 

 without setse. 



Each segment of the body, except the last two, bears seta, 

 which are short, slightly thickened at their extremities, and are 

 arranged as in the young larva, those of the last two segments 

 •being longer and acute. The integument of the body is roughened 

 by transverse rows of clearly defined ridges. The body is marked 

 by dorsal and lateral longitudinal stripes of yellow, which are most 

 distinct upon the thorax, the dorsal stripe being the widest. 



Pdpa. {Plate I., Fig. 2.) 



The general form of the young pupa resembles that of the larva. 

 The color of the legs, wing pads and antennae is a clear white, 

 while the head, thorax and abdomen are very light yellow and the 

 eyes bright red. When the larva first enters the pupal stage the 

 antennae are apparently three or four segmented, much shortened 

 and directed forward as in the larva, but after a few hours they 

 are laid back upon the head and thorax. The wing sheaths, which 

 are short, are developed outside the body. The legs are rather 

 thick and clumsy, and as the insect advances in the pupal stage its 

 movements become more and more sluggish and uncertain. No 

 food is taken in this stage. 



Upon the dorsal side of the ninth abdominal segment, near its 

 posterior margin, are four prominent, stout, recurved, hook-like 

 processes, while the abdominal setse are slender and acute. In 

 the fully developed pupa, before the final molt, the form of the 

 body more closely resembles that of the imago. The wing sheaths 

 extend backward along the sides of the abdomen to about the sixth 

 or seventh segment, and the fore pair bear a few small spines. The 

 pupal skin is partially separated from the enclosed insect. 



