272 LEPIDOPTERA. 



transverse lines double and the other dark markings intensi- 

 fied ; broken black clouds lying between the uervures; the 

 white markings obliterated, or only existing as faint dashes 

 between the double transverse lines, at the edge of the 

 stigmata, and in small scallops along the hind margin ; 

 and the usual large ovate blotch obliterated ; the hind 

 wings and underside also darker. Almost every inter- 

 mediate shade of variation also occurs, or the white mark- 

 ings are replaced by yellow, and in many the white ring of 

 the orbicular stigma is very distinct. These dark forms are 

 sometimes called collectively by the name of var. coronula, a 

 name which Haworth appears to have used to designate a grey 

 variety which he looked on as a distinct species. There is in 

 the collection of Dr. Mason a specimen in which the base of 

 the wing to the first line is strongly tinged with yellow. 

 On the wing in June and July. 



Larva nearly cylindrical, tapering but little at each end 

 except that the head is decidedly smaller than the second 

 segment; not very hairy, a single hair only arising from 

 each raised spot. Very clear, semi-transparent, glaucous 

 green, so that the internal vessels are visible ; the head 

 especially transparent, green with the mouth brownish ; 

 dorsal line yellow or white, very slender, sometimes only 

 visible on the middle segments ; subdorsal lines narrow, 

 yellow, complete ; spiracles pink or orange ; raised spots 

 very small, black ; legs and proiegs green. 



Dr. Chapman says that when newly hatched it is whitish 

 or colourless, except the head, which soon becomes black 

 with the jaws brown ; the raised spots are slightly outlined 

 in a darker shade ; each has a single hair which is greyish 

 at the base ; the raised spots or tubercles do not appear 

 crowded as in young larvas of the allied species, but the 

 eleventh segment is Hatter than the rest, as in them, and 

 its spots and hairs smaller. After the first moult the head 

 becomes greenish with a large black shade over the upper 



