PTEROPHORUS LITHOPACTYLUS. 365 



purplish streaks ; the under-side of the abdomen was 

 pale green ; like the larva also, it was thickly clothed 

 ou the dorsal surface with short, whitish hairs. 



Tlie imago appeared on the 12th of July. (George 

 T. Porritt, 3rd February, 1877; E.M.M., March, 1877, 

 XIII, 236.) 



Pterophorus pterodactylus. 



During last summer, 1881, a young " plume " larva, 

 which proved to be Pterophorus monodactylus L. = 

 pterodactylus Haw., was accidentally brought in with 

 some convolvulus I had gathered for a brood of P. 

 pentadactylus. By the middle of August it was full- 

 grown, when I described it as follows : 



Larva, when at rest, about five-eighths of an inch 

 in length, and stout in proportion. The head is 

 polished and rather small, narrower than the second 

 segment. The body is uniform and cylindrical, 

 tapering a little posteriorly. The segmental divisions 

 are well defined and deeply cut ventrally ; each 

 tubercle emits a tuft of short but rather strong hairs. 



The ground colour is bright yellowish-green, more 

 decidedly green on the back ; the head is pale yellow, 

 the mandibles are light brown. A fine but clear 

 yellowish- white line forms the dorsal stripe ; there is 

 a much broader stripe of the same colour along the 

 spiracular region, and the space between it and the 

 spiracles is freckled with streaks and spots of the 

 same colour. The spiracles are black, the hairs 

 greyish. The ventral surface, legs and prolegs, are 

 uniformly pale green. 



The pupa, although attached by the tail only, was 

 laid flat along the top of the cage. 



It produced a fine imago on the 14th of September, 

 1881. (George T. Porritt, 3rd February, 1882; 

 Entom., April, 1882, XV, 90.) 



