PTEROI'HORUS BEKTRAMf. 341 



Pterophorus BERTRAMI. 



About the middle of July in last year, 1884, Mr. 

 James Hinchliffe, then of Alva, now of Tillicoultry, 

 sent me a few eggs of this species. They hatched 

 out directly, and I at once placed them on a potted 

 plant of yarrow. Unfortunately, the plant died, and 

 I could find no trace of the larvae; but, on writing 

 Mr. Hinchliffe of the misfortune, this summer, 1885, 

 he very kindly made a search for the larvae, was at 

 once successful in finding them, and I had the pleasure 

 of receiving a supply from him on the 25th of June. 

 They were in three stages of growth, though most 

 were in the middle stage, or apparently about half- 

 grown. 



They were of the usual form of larvae of this 

 genus, though perhaps a little more slender than 

 some species ; the body is cylindrical, stoutest in 

 the middle, tapering towards the extremities; the 

 head is small and polished, considerably narrower 

 than the second segment ; the segmental divisions 

 are well defined, and the skin is rather glossy. 



When about a quarter of an inch long, the ground 

 colour is pale greyish-olive, but this is almost hidden 

 by dark purplish-brown dorsal and subdorsal stripes, 

 which give the larva a very dark appearance; the head 

 is very pale straw-colour, marked with smoky-brown ; 

 the ocelli are black, and the mandibles are reddish- 

 brown ; the frontal plate and the anterior legs are 

 polished black. 



In the next stage, that is when about three-eighths 

 of an inch long, it has become considerably lighter in 

 colour; the ground is glaucous-green, the dorsal and 

 subdorsal stripes are purple, but more interrupted, 

 and not so wide as in the earlier stage ; the head is 

 of the same pale straw-colour, but not so clouded 

 with darker, though the ocelli are still black, and the 



