28 SPHINX PINASTE.I. 



on each lobe. On the 6th of August one had accom- 

 plished its first moult ; its head, which was very similar 

 in shape to that of the larva of a Smerinthus, was now 

 of a pale green marked with a black streak down each 

 lobe from the apex of the crown, their black streaks 

 shortly afterwards were margined externally with yellow 

 streaks, the upper lip outlined with black and the mouth 

 black ; the body was green, the back being a deeper 

 green than the sides with subdorsal lines of whitish 

 green, and with a fine whitish green lateral line fol- 

 lowed by a stripe of the same deep green colour as the 

 back, which blends a little below into a yellowish 

 whitish-green spiracular stripe, which is abruptly con- 

 trasted beneath by the deep-green belly ; the black 

 caudal horn on the twelfth segment was of the same 

 shape as before ; all the legs as before. 



By the 9th of August several of the larvse had grown 

 to be 14 mm. long. 



On the 12th of August several had moulted the 

 second time ; the green colour was full and bright, 

 the pale yellow lines were of about equal stoutness, 

 the spiracular line being just the least degree the 

 stouter, the yellow stripes on each side of the head 

 were bright, edging the black stripes ; the caudal horn 

 was reddish- brown and glossy with the tip black, 

 slightly bifurcate and flattened ; the larvas at this time 

 no longer ate along the side of a needle-leaf, but 

 attacked it from the end biting it quite through, and 

 thus continued to munch gradually stepping backwards 

 as it shortened the needle till the needle was consumed 

 close up to the sheath at the twig or stem. 



Between the 16th and 18th of August several of the 

 larvae had moulted the third time. The spiracular line 

 was now a little interrupted at the end of each seg- 

 ment ; the head, the anterior legs and ventral prolegs 

 were now glossy, smooth and red, and the hinder half 

 of the anal prolegs, anal flap and rough caudal horn 

 were glossy, but with minute black points ; the caudal 

 horn was now curved, and viewed in profile tapered 



