46 APATURA IRIS. 



the tip of a leaf ; each leaf thus tenanted showed that, 

 at a little distance below the larva, a small portion had 

 been eaten from its edge, on one side, quite through the 

 whole substance. The larvae were now just one-eighth 

 of an inch long, and on their rough granulous heads, 

 could be seen, with the aid of a lens, two large, some- 

 what bright, oval, smooth patches of paler colour, each 

 with a central dark spot occupying the crown of the 

 lobes ; the body light yellowish-green, faintly showing 

 a darker dorsal line and slanting side streaks. 



When but five days old I found the Colchester 

 larva lying dead, where it had been feeding on the 

 edge of a leaf ; the cause of this mishap arose from 

 the state of its food, which could not without risk be 

 changed the day before, as three of the other larvae 

 just a week old were fixed for moulting, each on a 

 coating of silk, spun either on the glass cylinder or on 

 the side or tip of a sallow leaf; tho other larva, not 

 previously visible for a day or two, now made its 

 appearance again, having already completed its first 

 moult, furnished with remarkably long and stout horns, 

 cleft at the dark reddish tips. This I noted as No. 1, 

 a very lively and active little creature, roaming over 

 the sallow leaves for an hour or two after its removal 

 from the rest before establishing its footing on a leaf 

 point. 



On the tenth day No. 2, which had been fixed on the 

 cylinder, moulted ; on the twelfth day No. 3, on a leaf 

 tip, had also moulted, both furnished with horns like 

 No. 1. The remaining larva moulted on the thirteenth 

 day, but appeared without horns, the head being much 

 the same as before, though the colouring of the body 

 was changed like the others, viz. to a bright green, 

 with yellowish subdorsal stripes on the six anterior 

 segments, and yellow slanting lines along the sides of 

 the others, the points of the tail brought close together 

 appearing very like one anal point, ringed with red. 

 This hornless larva fed and seemed very lively and well 

 up to the twenty-first day, when it spun a layer of silk 



