OF WASHINGTON, VOLUME XIX, 1917 1/)1 



On the side of segments three to nine, and located at about the apical 

 third, is a small, round, flattened spiracle, with one faint slit across the 

 middle. 



The PREPUPAL larva is white and of about the same size and appearance 

 as the larva. There is a great shrinkage of the first segment and from a 

 side view the dorsum of this segment is concave. 



The humeral spiracle is formed slightly in front of .-md above the large 

 anterior spiracle of the larva, and all the lateral, abdominal spiracles are 

 formed in front of and below those of the larva. All the abdominal spines 

 and bristles are pale yellow and perfectly formed under and show through 

 the semi-transparent larval skin. The large pointed horn-like projections 

 at the apex of the abdomen project slightly through the skin and are of the 

 darkened, nearly normal coloring. 



Pupa (plate XVIII, jig. 2}. 



The pupa is elongate, cylindrical, moderately shiny and faintly rugose. 

 The general color is pale yellow ochre. It measures 20 mm. in length and 

 5 mm. in width at the thorax while the abdomen is slightly narrower. 



Head. On each side of the apex is a large, pointed, horn-like projection, 

 below each of these, on the side, is a larger one with three large prongs, the 

 last one having two small points at the apex. 



These large projections are deep reddish-brown, very rugose at the base 

 and smooth and shiny on the apical half. In back of the above projection 

 is a small, sharp pointed, tooth-like projection, yellow at the base and red- 

 dish-brown at apex; near the middle of the upper side is a small ridge reach- 

 ing to the apex. 



Thorax. Near the base of the first abdominal segment, across the middle 

 of the next four segments and at the apex of the last segment, yellowish 

 brown. 



The humeral spiracle is small, reniform, pale yellow, smooth and slightly 

 raised, with a row of uniform dark dots around the curved edge. (See 

 drawing, plate XVIII, fig. l>.) On the upper edge of the wing-pad is a 

 rounded, raised surface, with a small, narrow, darkened, sharp edge just 

 back of the center. At the lower edge of the pleura and touching the wing- 

 pad is a foot-like projection, which is reddish-brown towards the apex where 

 there are two small, tooth-like points and one large point near the base. 



The wing-pads reach to the middle of the second abdominal segment 

 and the leg-sheaths to the middle of the third segment. 



Abdomen. There are eight well defined segments. All but the last 

 have a transverse row of sharp, claw-like dark-brown spines across the 

 dorsum of the segments, becoming quite long and yellow on the sides of the 

 segments and diminishing in length on the venter. These ventral bristles 

 increase in length, on each segment, as they near the last segment. For 

 the location of these spines and bristles see drawing (fig. '_' 



At the apex of the abdomen are four large, very rugose, reddish-brown. 

 chitinous tooth-like spurs; between the lower pair on the dorsum. arc two 



