296 LEPTDOPTERA. 



dorsal line dark grey-brown with a fine thread of paler along 

 its lower edge, followed at a little distance by another such 

 pale and rather thicker line, though much interrupted or 

 broken up by the deep wrinkles of the skin ; at some dis- 

 tance again below runs the subspiracular stripe of the same 

 pale greyish-brown, with a streak of the ground colour 

 through the midst of it ; the head has the front margins of 

 the lobes broadly streaked with blackish, and a little at the 

 sides also ; the mouth is large and sometimes blackish ; the 

 plate on the second segment is not so noticeable as usual in 

 this genus by any difference of colour, though it is a little 

 darker brown toward the margin in front ; the dorsal and 

 subdorsal paler threads are faintly seen to pass through it. 

 As the larva approaches full growth the skin becomes 

 somewhat shining, and the raised spots, which immediately 

 after the previous moult come out black, grow paler in the 

 centre and are of a dark brown all round it, each furnished 

 with a short fine bristle ; the spiracles are black and rather 

 small in size. 



When first hatched it is of a greenish-grey, with blackish- 

 brown head and dorsal plate, the raised spots black and 

 furnished with hairs. After feeding a few days it becomes 

 of a greenish-ochreous tint, and in another week of a 

 greenish-olive, or rarely reddish-grey. From the time that 

 it is about half an inch in length to about an inch its colour 

 is ochreous, with a dark double dorsal line and two lines on 

 each side, the raised spots small and dark brown. After the 

 final moult it comes out at first very much darker than 

 before, with quite a noticeable appearance of sootiness over 

 it, all the lines being purplish-black and much suffused ; the 

 skin also presents quite a rough surface, and although this is 

 afterward partly lost it yet remains a distinguishing feature 

 to the end. 



August to November, when it retires for hybernation; 

 feeding again in March and until the middle of May. On 

 low-growing plants generally. Chcnirpodium, Folygonuin, 



