BOTYS HYALINALIS. 123 



fine brown thread on the latter half of each segment, 

 and there is a little transverse streak of the same tint 

 at each segmental division, and also at the middle 

 wrinkle of each segment ; the spiracles appear of the 

 ground colour ringed with brown. 



Early in May the full-grown larva is about 16 mm. 

 long when at rest, and quite 22 mm. when extended 

 in walking, 3 mm. wide at the seventh segment, where 

 it is stoutest; the colour is still dull opaque white, 

 with perhaps the faintest tinge of green ; the dorsal 

 region with a faint shade of black from the internal 

 vessels ; the head very pale reddish, with a dark dot 

 on the top of each lobe, and another dot on each 

 cheek ; the collar now with scarce any reddish tinge 

 at all, but showing its dots distinctly, namely, a row 

 of six small ones close to its front edge, about the 

 middle on either side a double dot like a figure of 8, 

 and then a transverse row of eight dots varying in 

 size, and lastly, a pair near the dorsal line just on the 

 hinder edge; the belly is now of a yellowish-white, 

 the spiracles are black, the thoracic legs rich brown ; 

 the dots and warts are just as before, perhaps more 

 prominent, and as the lateral and ventral dots, as well 

 as the dorsal, are all placed on shining warts, the 

 effect is striking. 



The cocoon is regular in figure, about 20 mm. long 

 and 12 mm. wide, of very fine gauzy texture, made of 

 white silk. 



The pupa is slender, 13 or 14 mm. long, tapering 

 gradually to the tail, the tip of which terminates in a 

 long spike with square end, set with six long curled 

 spines; the pupa-skin is glossy and shining, curiously 

 ornamented with tufts of hair; on the back of each 

 segment, just in the region of the subdorsal lines, 

 there is a pair of tubercles, each set with a whorl 

 of eight or ten harsh-looking waved and curled hairs; 

 three of the anterior segments bear in addition each a 

 pair of longish transverse ridges behind these tubercles, 

 and closely set with shorter curled bristles, and on the 



