3o6 LEPIDOPTERA. 



well as the intermediate wrinkles, so that the skin appears 

 very smooth and soft. The colour on the head and back 

 is a delicate bluish-green, quite opaque on the back ; the 

 dorsal line very thin — a mere pale thread — and edged with 

 darker green than the ground colour ; subdorsal line whitish, 

 better defined, and also edged with darker, indeed this line 

 on the thoracic segments is white ; beneath it, as far as the 

 spiracles, the colour is transparent yellowish, or else a full 

 green, so clear as to show the branchial vessels through 

 it ; this colour deepens gradually below till it terminates 

 in a fine blackish-green line, along the lower edge of 

 which are the white spiracles, outlined with black ; spi- 

 racular stripe brilliant, pure white, very broad along the 

 middle segment, and a little attenuated toward each end, 

 often extending along the side of the head toward the 

 mouth, and ending behind at the extremity of the posterior 

 legs ; under-surface and legs rather paler and more yellowish- 

 green than the back; after the thoracic segments the tuber- 

 cular dots are arranged in threes on either side of the dorsal 

 line ; they are paler than the ground colour and sometimes 

 ringed with a little darker colour. 



The variations seem to be in the depth of the general 

 ground-colour — more or less blueness of the green — and in 

 the presence or absence of a small blackish oval ring with 

 whitish centre (or false spiracle) on the sides of the third and 

 fourth segments. 



The young larva when first hatched is pale olive-green, the 

 large head pale brown with distinct dots and hairs ; in a 

 couple of days rather bluish green ; in a fortnight, of a full 

 deep green with the lines and dots paler green; in another 

 month the colour changes to yellow-green, and then the fine 

 lines are whitish ; by the end of May the adult colouring 

 is assumed. (W. Buckler.) 



It has been stated that in this larva when just hatched 

 from the o^^'g the first usual pair of prolegs is not visible at 

 all, and the second pair only indicated by two minute 



