C YMA TOPHORTDM. 203 



square black marks ; skin of the body soft and smooth, not 

 glossy ; dorsal region faintly yellow, tinged with greyish and 

 changing almost imperceptibly to primrose-yellow along the 

 spiracular region, and then again to the delicate tint of the 

 back ; a very faint glaucous pulsating vessel shows partially 

 through the dorsal line. On the second segment is a narrow 

 shining pale-greyish dorsal plate, and another is on the anal 

 segment; on each side of the second segment are three black 

 spots ; on each side of the third, two, and of the fourth and 

 twelfth one each ; spiracles pale pink ; tubercular dots 

 minute, whitey-brown, each with a single hardly perceptible 

 hair ; legs and prolegs shining yellowish-white. When very 

 young pale straw-colour, inclining to greenish. When half 

 grown the body is pale buff, very velvety in appearance ; head 

 pale honey-yellow, with black ocelli, and black on each side 

 of the mouth ; the dots on the body as already described. 

 As it grows it becomes greyish-green, with orange-brown head, 

 and gradually assumes the adult colouring. (W. Buckler.) 



End of June to September, on poplar. When very young 

 it commences to unite the leaves together with short thick 

 silken threads, and then feeds on one surface only of the 

 leaf. When half an inch long it begins to eat quite through 

 the leaf, and from this time feeds in the ordinary manner, 

 continuing to hide in its domicile of leaves during the day, 

 and to leave it at night for the purpose of obtaining food 

 without injuring its home. The short threads, ending in 

 broad studs or pads of white silk, with which the leaves are 

 fastened together, are very curious. They are strong, and the 

 larva is not readily dislodged. Sometimes it selects a curled 

 dead leaf on the tree as its habitation. 



Pupa thick and short, the surface covered, except at the 

 abdominal incisions, with minute pits, or on the thorax and 

 wing covers by minute ridges ; at the aual extremity are 

 two converging spines, of which the recurved tips meet and 

 cross each other. Colour black, divisions of segments dull 



