THE CANADIAN ENTOMOLOGIST. 343 



From my observations I would say that the mature larva oi parthenice 

 differs from the mature larva of virgo in the size of body, size of tubercle 

 i, colour of tubercles, particularly on the dorsum, and in having the 

 thoracic feet red. The bristles from the tubercles are not so stiff in par- 

 thenice as they are in virgo. 



Pupa. — Length 22-24 tin^-j width 8.5 mm.; dull black, conspicuously 

 pruinose ; yellowish or reddish in folds of abdomen. Thorax and 

 abdomen bear short, black, stiff bristles. Spiracles black. Cremaster 

 shiny, blackish ; bristles capitate, reddish brown. 



Rectilinea. — In my previous notes, included in the above paper, I 

 spoke of this Arctian as being "very rare in Canada." During 1903, how- 

 ever, the species was rather abundant at Aweme, Man., and a nice series 

 of the moths was collected by Mr. Norman Criddle. While Dr. Fletcher 

 was in the West, in 1903, he stopped off at Aweme, and among other 

 interesting things collected some Arctian larvae. These were received at 

 Ottawa on June 25, Unfortunately, only one of these larvse reached the 

 pupal state ; the moth emerged on July 25 and proved to be rectilinea. 

 The length of the pupal state was 19 days. This larva was a handsome 

 caterpillar, very rapid in its movements. In length it was 33 mm., the 

 head black, epistoma yellowish ; median suture and margins of clypeus 

 pale, the latter dark reddish brown at vertex. Skin of body in general 

 gray, mottled with velvety black. Dorsal tubercles of a yellow amber 

 colour, those below the spiracles of a reddish tinge. Bristles from 

 tubercles distinctly but finely barbed, those from tubercles above spiracles 

 mostly black, with a few silvery ones intermingled ; from lower tubercles 

 all silvery, tipped with rust-red. Dorsal stripe distinct, not broken, of a 

 bright pale yellow colour, tinged with red on the summit of each segment. 

 Feet reddish ; thoracic feet tipped with black. 



This description agrees for the most part with the description of 

 Stage VII in my notes already published* on the larvse of this species. 



Pupa. — Length 20 mm., width 6 mm., almost black, with a reddish 

 tinge, paler in folds of abdomen ; only slightly pruinose ; abdomen and 

 thorax bearing sparsely, short, inconspicuous bristles. Spiracles concolor- 

 ous with segments. Cremaster reddish, shiny, bristles capitate, of varying 

 lengths. 



At Aweme the dates on which Mr. Criddle has taken the moths are 

 July 26, 27, August 6, 15, 17 and 25. Mr. L. E. Marmont, at Roun- 



*Can. Ent., May, 1903. 



