TIGRIS BRASSI02E. 151 



slightly from about the middle towards the head and 

 tail, the head rounded, narrower than the second 

 segment, the skin at last shining, the usual warts 

 sharply prominent, the whole body sparsely set with 

 short hairs ; the colour of the back is a light greyish 

 or bluish green (the blue tint predominating in some 

 examples and the yellow in others), the dorsal line deep 

 rich yellow, the spiracular region paler and duller 

 yellow, the belly more greenish ; the lobes of the head 

 bluish-grey, finely powdered with small black dots 

 bearing short light hairs, and broadly margined all 

 along their front edges with black ; the space between 

 these black borders pale yellow, the upper lip blue-grey, 

 the mouth black ; the usual warts black and shining, 

 surrounded by large dull black spots, the largest of 

 which is that which surrounds the lateral wart, the 

 rest of the back is set with black spots of two or three 

 magnitudes, arranged on the subdivisions of the seg- 

 ments. All the legs yellowish with black marks ; the 

 black shining plate on the second segment divided 

 by the dorsal line, which also enters the black plate on 

 the thirteenth segment for half its length ; below the 

 spiracles only small and pale black spots occur ; the 

 spiracles indistinct, pale with black rings. 



The larva for pupation fixes itself head upwards or 

 horizontally on a flooring of silk, with a belt round the 

 middle, and a holdfast for the anal legs. The pupa is 

 26 mm. long, well proportioned and stout, somewhat 

 angulated, the head with central spike or horn, the 

 back keeled throughout, the keel rising very high on 

 the thorax in two steps to a bluntish point, and then 

 falling in the same way to the waist ; the abdomen not 

 so prominently keeled, at the end the keel bifurcates 

 forming the two sides of the spike ; the shoulders 

 angulated, from these a subdorsal ridge angulated 

 along the wing-cases with two prominences, the 

 second being the higher. There is a variety in which 

 this second prominence becomes quite a spike. (Dr. 

 Jordan sent me a specimen in 1874, and the two 



