ARGYNNI8 SELENE. 75 



along the side, and a pale spot below each subdorsal 

 spine, followed again below by a stripe of the darker 

 colour of the back. 



On attaining a length of three-eighths of an inch, 

 its appearance is again changed ; it then has a broad 

 dorsal stripe of pinkish-grey, a subdorsal stripe of 

 blackish-brown, and below it, on the sixth, eighth, tenth 

 and twelfth segments, are blotches of orange-ochreous ; 

 below these, on all the segments, there are similar 

 blotches, forming a somewhat interrupted broad 

 stripe. 



The larvse, which are hybernating at this stage of 

 growth, turned gradually to almost a dull pale orange 

 colour throughout, the head and spines (all of the same 

 length) remaining shining black. 



After the next moult there is again seen the previous 

 arrangement of colours, but rather brighter ; the spines 

 and head still black as before — the larva being about 

 five- eighths of an inch in length. 



After another moult it assumes the final dress ; it is 

 then three-quarters of an inch long — increasing after- 

 wards to about an inch — tolerably uniform in bulk, but, 

 when looked at from above, widest about the fifth and 

 sixth segments, and tapering thence very slightly to 

 the tail ; the segmental divisions are well defined. 



The head is rather notched on the crown. Of the 

 six rows of spines the upper (or subdorsal) rows are 

 rather stouter than the others and the front pair of 

 this row, which are the only spines on the second seg- 

 ment, are now rather more than twice as long as the 

 rest, and after tapering for some distance become 

 thicker again at their tips, and standing forward a little 

 apart from each other over the head remind one much 

 of a pair of snail's horns ; on the third and fourth 

 segments there are but four rows of spines, and those 

 finer than the rest ; as a whole the spines may be des- 

 cribed as conical, thick, fleshy, shining, and semi- 

 translucent, ochreous in colour, tinged with pink, and 

 beset with fine-pointed black bristles ; those spines on 



