PTKR0PH0RUS PENTADACTYLUS. 381 



grew rapidly, and by the 5th of May, the largest was 

 nearly full-grown. 



The larva is nearly three-quarters of an inch in 

 length, and of average build. The head is polished, 

 it has the lobes rounded, and is a little narrower than 

 the second segment. The body is cylindrical, and 

 fairly uniform, tapering only a very little towards the 

 extremities. The segmental divisions are clearly 

 defined; the tubercles are prominent, and from each 

 of them springs a tuft of moderately stiff hairs ; in the 

 tuft of hairs from the tubercles on the second, third, 

 fourth, twelfth and thirteenth segments is a single 

 hair, much longer than the rest, which stands out 

 very conspicuously. The skin is soft and smooth, 

 but only very slightly glossy. The ground colour is 

 of a median shade of dark green, exactly the colour, 

 indeed, of the convolvulus leaf, on which it feeds. 

 On the dorsal area, however, the ground colour only 

 appears as a large lozenge- shaped mark on each 

 segment, except the ninth, the remaining space on 

 each segment, and the whole of the ninth segment, 

 being filled with bright lemon-yellow. The darker 

 green alimentary canal shows through as the dorsal 

 line ; there are no perceptible subdorsal lines, but 

 there are long and continuous whitish streaks along 

 the posterior half of the spiracular region. The head 

 is bright yellowish-brown, the mandibles are reddish- 

 brown, and the ocelli are black and distinct. The 

 tubercles are intensely black, and the hairs are 

 greyish. 



The imago from this larva was out on the 31st of 

 May. (George T. Porritt, 9th December, 1882; 

 E.M.M., January, 1883, XIX, 187.) 



