THE CANADIAN ENTOMOLOGIST, 13 



1 1 this ridge is distinct, cleft to the body ; color variable, some examples 

 being white, some decidedly greenish ; many have the posterior slope of 

 the 2nd segment black or dark brown ; some also have most of the dor- 

 sum dark brown, irregularly mottling the light ground ; some have only 

 small brown patches disposed without rule on the dorsum, and mostly on 

 the anterior segments ; the whole surface velvety ; this appearance is 

 caused by minute stellate glossy processes, scarcely raised above the sur- 

 face, only visible under a magnifyer, mostly six-rayed, and sending from 

 the centre a concolored filamentous spine a little longer than the rays ; 

 these stars are arranged in pretty regular rows, and are light except on the 

 brown patches — there both star and spine is brown ; on the nth segment, 

 near posterior edge of dorsum, is a transverse slit, in a sub-ovoid spot, 

 from which proceeds an ovoid membranous process ; and on 12, back of 

 and between the stigmata, on either side is a mark like a stigma, but a 

 little larger, from which proceeds a membranous tube, in form of a trun- 

 cated cone, ending in a crown of feathery tentacles ; these three special 

 organs are exposed or concealed at the will of the larva ; (similar openings 

 are found in the two preceding stages of the larva, but less easily seen) ; 

 head small, obovoid, dark brown, placed at the end of a long, pale-green, 

 conical neck, which is retractile, both neck and head being covered by 

 2nd segment. 



The foregoing descriptions are taken from the summer larvse, feeding 

 on flowers of Gimicifu%a racemosa. The larvae in the fall, feeding on 

 flowers of Acthiomeris sqitanvsa, differ much in color from the description 

 after second moult, being generally in last two stages yellow-green and 

 olive-green, the sides darkened, the dorsum lighter, and there is an absence 

 of the brown patches seen in the summer larvae ; the back of 2nd segment 

 sometimes green, sometimes brown. On the dark shades of the sides the 

 stellate processes are often pink. 



Before changing to chrysalis the summer larvae sometimes turn pink 

 and from pink to brown, or become brown without the pink stage ; but 

 others remain white, changing to sordid ; the body contracts to about .3 

 inch, and becomes rounded. Duration of larval stages 19 days. 



CHRYSALIS— Length, .28 inch; greatest breadth, .12 inch; the 

 ventral side straight, the dorsal rounded and evenly except for a very 

 slight depression below the mesonotum ; both ends rounded ; the abdo- 

 men broadest ; color dark brown or yellow-brown, varying ; on dorsal 

 part of abdomen on either side is a row of blackish dots, continued to 



