338 THE CANADIAN ENTOMOLOGIST. 



in previous stage, but the colour is now a distinct reddish brown. Spiracles 

 black, close in front of tubercle iv. Thoracic feet black ; prolegs slightly 

 darker than ventral skin. 



Stage III. — Length 7 mm. Head 0.8 to 0.9 mm. wide, black, shiny; 

 slightly bilobed. Body dark, almost smoky, with a tinge of green, 

 becoming paler ventrally. Dorsal stripe dull orange, rather indistinct. 

 Along the sides, above tubercles iii and iv, are two series of dull orange 

 dashes, one above each tubercle, not very distinct. Bristles as in last 

 stage. Spiracles small, black. Thoracic feet blackish, prolegs concolor- 

 ous with venter, darker exteriorly. 



Stage IV. — Length 10 mm. Head i.i to 1.2 mm. wide, jet black. 

 Skin of body velvety black, duller ventrally. Tubercles black, each bearing 

 a bunch of finely barbed bristles, those from i, ii, iii and upper part of iv 

 being black, lower bristles pale rusty. No markings on the body. 

 Spiracles black. 



Stage V. — Length 17 mm. Head 1.6 to 1.8 mm. wide, black as 

 before, epistoma pale. The larvae in this stage did not show any difference 

 from Stage IV. The velvety black of the body is the same as in the 

 mature larvae. 



On Sept. 26 six specimens moulted for the fifth time. At this 

 date, and for some days previous, the larvae, which were in a healthy con- 

 dition, showed signs of hibernation, and practically ceased feeding. 



Stage VI. — Length 30 mm. Head 2.4 to 2.6 mm. wide. In this 

 stage the bristles from tubercles i, ii and iii in most of the specimens are 

 all black, but in some there are rust-red bristles on the dorsum of segments 

 2, 3 and 4, particularly on segment 2. One specimen had all rusty 

 bristles from all the tubercles, on segments 2 to 7 inclusive. Tubercles 

 shiny, black. Spiracles orange. In one specimen these were all black. 

 No markings of any kind on the body. 



Unfortunately, not many of the larvae came through hibernation 

 successfully, although we tried several different methods of hibernating 

 them. Those which did come through alive soon died. 



Mature Stage. — In the May, 1903, number of the Canadian 

 Entomologist notes are given on the mature larvae. After this paper 

 was written Mr. C. H. Young gave me three mature larvae collected in 

 May, near Ottawa, all of which showed traces of a dorsal stripe, and had 

 tubercles i, ii and iii black ; iv, v, vi, vii and viii all reddish excepting in 

 one of the specimens, which had vii and viii almost black. One of these 

 /larvae pupated on May 27, the moth emerging on June 24. 



