122 LEPIDOPTERA. 



grey, the darker grey border shading inwards in these paler 

 specimens. Rarely the spots and hind wings are almost 

 white, with a floury appearance, arising from a dusting of 

 whitish ochreous scales. 



The scales lying separately upon the surface of the fore 

 wings, bear the queerest possible resemblance, under a good 

 magnifier, to immense shoals of tadpoles. 



On the wing in July. 



Larva two-thirds of an inch in length ; broad and fat ; 

 head very small, glossy black, retractile ; body enlarging 

 rapidly, with segments rather deeply divided ; upper part 

 of second segment naked, green, somewhat retractile ; body 

 very dark green ; subdorsal stripes velvety black, interrupted 

 by bright yellow transverse spots; each segment with a 

 series of ovate tubercles thickly studded with short black 

 bristles, and each having one long black hair; spiracles 

 black ; under surface smooth, paler green ; legs shining, 

 green and black ; prolegs light green. When very young 

 pale green, and continuing so until hybernation. In the 

 spring, when approaching full growth, intensely black with 

 bright yellow lateral spots. (Buckler.) 



August to June on Azalea procumhcns, Ghcrlcria sedoides, 

 Silenc acaulis, Trifolium al2nnum, T. oxpcns, T.pratcnse, Lotus 

 corniculatus, Gcum montanwn, Sibhaldia 2Jrommhens, Alche- 

 willa alimia, feeding in the sunshine. Dr. White says Erica 

 and Vaccinium, and that he reared larva3 upon Polygonum 

 aviculare and Triticum rcpcns — plants which do not grow in 

 their native localities. 



Pupa half an inch long, tapering behind, the backs of the 

 abdominal segments with rows of minute hooks ; leg and 

 antenna-sheaths free at the ends; wing-cases with the 

 margins prominent : black, with the abdomen greenish-black, 

 not glossy. In a rather fusiform cocoon attached to a stone, 

 rock, or other object ; colour pearly-grey with a silveiy lustre. 

 (Buckler.) Mr. W. H. Tugwell found a cocoon attached to 



