THE CANADIAN ENTOMOLOGIST. 345 



July (seven specimens), first moth emerged Aug. 6, and proved to be A. 

 jievadensis, var. incorrupta \ got 3 ? ^"d 3 $ , but cculd not get them to 

 mate." 



During the summer of 1904, Mr. Marmont found further specimens of 

 the larvje feeding on the same plant, some of which he was kind enough 

 to send for study. Unfortunately, this food plant does not occur at Ottawa, 

 and although the larvae were offered several other low plants, they refused 

 them, and soon died. 



In June last, however, Mr. Marmont sent some more specimens, 

 which arrived in perfect condition. These were found feeding on the 

 same plant, Castilleia sessiliflora, but this year, although Mr. Marmont 

 continued for a while to send us a supply of the food-plant, we had no 

 trouble in getting them to eat dandelion and plantain. 



The following description was made of the mature larvae : 



Length 38 mm. Head 3 mm. wide, shiny, wholly black, excepting 

 median suture, lateral margins of clypeus, which are pale, and a few streaks 

 of white above the ocelli. Skin of body gray, streaked and blotched with 

 black, or purplish-black, which gives the whole larva a purplish tinge; skin 

 paler ventrally. Dorsal stripe broken up on abdominal segments into 

 spots, three on each segment, the central one of which is yellow and 

 roundish, and immediately behind tubercle i ; the other two spots are 

 white. On the thoracic segments the dorsal stripe is almost complete. 

 Tubercles on all the specimens very conspicuous, and decidedly yellow, 

 almost ochre yellow ; i nearly one-half the size of ii ; iii not so large as ii, 

 but larger than iv, v and vi. Bristles faintly barbed, and mostly whitish; 

 some yellowish and black bristles from the dorsal tubercles. Spiracles 

 black. Thoracic feet black, prolegs yellowish. 



The cocoon of vicorriipta is very slight, as in other species of the 

 genus. One larva, which changed to pupa on July 3, produced the moth 

 on July 20; another which pupated on July 7, emerged as moth on July 21. 



Pupa. — Length 20 mm., width 6.5 mm., reddish-brown, paler in folds 

 of abdominal segments ; very slightly pruinose. Thorax and abdomen 

 sparsely hairy. Spiracles black, with pale centre. Cremaster darker than 

 abdomen, shiny, bearing capitate bristles of varying lengths. 



Mr. N. Criddle tells me that he has found the larvfe of incorrupta at 

 Aweme, Man., feeding on Lamb's-quarters. 



