1880.] 123 



very subdued ochreous-yellow in angular forms on the back ; five days 

 later it spins a quantity of silk, tying as it were the leaves loosely 

 together, but firmly, for its safety while laid up for another moult, 

 which is accomplished after two or three more days, and then it has 

 the characteristic party-coloured coat of dark velvety-brown and pale 

 cream-colour, the tubercular process appearing on the fourth segment 

 as two short black eminences ; it soon spins more silk threads, keeping 

 the leaves partly together, and feeds well until once more laid up for 

 moulting, and this takes place after about a week from the previous 

 change of skin. 



Now the rosy-pink colour appears on the belly and ventral legs, 

 and the yellow parts of the back have a thin brown dorsal and fine 

 lateral lines, the yellow being much brighter than before ; three 

 distinct shapes of yellow are seen on the back, well defined, and con- 

 trasted by the rich dark brown surrounding them, viz., a brilliant pale 

 yellow triangular mark, its base at the beginning of the fifth segment 

 its apex at the beginning of the sixth ; an elongated diamond-mark of 

 deeper yellow extends from near the beginning of the seventh segment 

 to near the end of the ninth ; another begins on the front of the tenth 

 and includes the pointed tail, relieved on the twelfth segment with a 

 brown chevron : as the larva grows, these yellow marks expand and 

 become united into one long fluctuating shape along the back, as I 

 have formerly described ; though I have since then had one variety 

 retain the triangular mark isolated distinctly to the end of its larval 

 existence ; and another with the yellow colour rather inclining to drab. 

 Having referred to my former account of this species, wherein 

 mention was made of two young larvae dying, rather than eat the lime 

 supplied to them, and that yet only the year before a nearly mature 

 larva had thriven on that food well enough, it is now needful to state 

 that what seemed to me then so inexplicable, received afterwards an 

 easy solution when Mr. Grrigg sent me some lime gathered in the haunts 

 of sicula, leaves whose smaller size, and qualities of texture and colour, 

 were different from those the little larvae rejected ; it was a great 

 satisfaction, then, on visiting the trees where, without thought of any 

 particular species of lime, I had first gathered food for the adult larva, 

 to find they were Tibia parvifolia, and that T. europcea also grew at no 

 great distance, to which, by a mischance, the next year at night my 

 footsteps had been directed, an incident proving the importance of 

 having the proper name, when allusion is made to trees or plants as 

 food for larvae. 



Emsworth : October 10th, 1880. 



