24 



specimens, but as the pupa matures the imaginal eyes appear as two 

 reddish spots in the cephalic region. 



The pups are greenish white in color, wiith yellow bodies pres- 

 ent in the basal abdominal region as in the previous instars ; the 

 empty pupa cases are white. 



The length of the pupa varies from .66 to .88 mm.; the greatest 

 width from .396 to .55 mm.; average length about .76 mm.; average 

 width about .49 mm. 



Adult. (Plate IV, Figs. 17-20; Plate V, Figs. 21-27.) 



Female. The length of the body of the adult female varies from 1 . 

 to 1.3 mm., the average being about 1.14 mm. The color of the head 

 and thorax is pale yellowish buff, and of the abdomen pale lemon 

 yellow. The tip of the rostrum* is black ; the legs and antennas are 

 pale yellowish, sometimes slightly tinged with dark white. The vasi- 

 form orifice and the base of the ovipositor may be more or less dark 

 colored. In specimens mounted in balsam the thorax is deep orange 

 in color, due to muscles within ; the abdomen is bright lemon yellow, 

 showing bright orange or orange red ovaries and egg nuclei. Soon 

 after emergence from the pupa case the whole body becomes covered 

 with a white amorphous waxy secretion. This first appears in the 

 form of very fine threads exuded from extremely numerous and 

 minute pores in the integument. 



The head is transverse ; seen from the front, sub-triangular, 

 rounded above. Two pairs of reddish eyes are borne on each extreme 

 side, the upper pair of which is wine colored, being a little lighter in 

 color than the lower pair. There are about forty-eight pigmented 

 facets to each of the upper eyes, surrounded by about ten unpig- 

 mented ones. The lower eyes are each composed of about thirty 

 pigmented facets, larger in size than the facets of the upper eyes. 

 Both the upper and lower eyes are sub-circular in outline, separated 

 by a narrow strip of integument. Directly above each upper eye is 

 a single unpigmented ocellus. Each antenna arises a short distance 

 in front of the upper eye of its respective side. It consists of seven 



* I have here used " rostrum " in the sense of beak. Some writers follow Maskell in 

 designating this organ the mentum. As Maskell gives no evidence in support of this view, 

 and as I have been unable to find any reference to a study of the homology of the mouth 

 parts of this group of insects, I prefer to retain for the present the word " rostrum," as used 

 by the older writers. 



