180 



MAINE STATE COLLEGE. 



Fig. 19. Psila rosse. Larva \8 times 

 (original.) 



Fig. 20. Psila rosse 

 (original.) 



blunt, obliquely docked and bearing on the face of the oblique por- 

 tion the dark colored caudal spir- 

 acles. Third segment from the last 

 longest and somewhat lorjger than 

 the last two. The sutures between 

 the segment deep. The segments 

 somewhat transversely wrinkled. See Fig. 19. 



Pupce — 5 mm. (.20 in.) long, 1 25 mm. (.05 in.) wide, 



coarctate, brown, obliquely docked 

 behind. The docked portion bor- 

 dered by a rim and bearing two 

 black tubercles. Fig. 20 shows 

 dorsal and side views. The form 

 of the pupae is quite variable. 

 Some have two tubercles at the 

 head end and the black candol 

 spiracles show on the oblique end. 

 Pupre x 3 times Some have the sides parallel while 

 others are quite fusiform. The 

 surface is quite wrinkled. Some are fully a fifth longer than others. 

 Flies — Length 6 mm. (.25 in.) Wings 3 5 mm. long (14 in.) 

 and extending nearly half their length beyond the abdomen, 

 thin and iridescent. Abdomen and thorax shining pitch black 

 clothed with short grayish pubescence. Head pale orange or yel- 

 lowish ; eyes dark brown ; Antennae basal joint general color of 

 head, terminal joint nearly black, bristles light. A spot above the 

 mouth black, palpi black, proboscis very prominent, oblong and 

 armed with many short hairs. Legs pale yellowish brown. Abdo- 

 men ovate. Scutellum raised and bearing two bristles. Arista 

 armed with short hairs. About eight bristles on the mesothorax. 

 The flies have the habit of opening and closing the wings, which 

 are L quite iridescent in the sunlight. The males are smaller than 



the females. Fig. 21 shows the form 

 and veining of the wing. If the veining 

 of the win g s o Psila rosce are cor- 

 rectly shown in the small cut in United 

 States Agricultural Report, 1893, p. 133 

 then serious doubt arises regarding the 

 determination for the veining of the wings of our specimens are 

 quite different. Probably in so small a cut accuracy was not con- 

 sidered essential. 



Fig. 21. Psila rosa?, wiu 

 10 (original.) 



X 



