THE CANADIAN ENTOMOLOGIST. 325 



efface on eitlier side of apex of frontal triangle there is a small shallow 

 depression. The skin of body is a beautiful deep black velvety colour. 

 Dorsal tubercles are grayish, with the exception of those on 2nd, 3rd 

 and 4th segments, which are whitish — all other tubercles are whitish. 

 All tubercles above spiracles on segments 5 to 13 bear long silvery 

 hairs from one-half to three-quarters of an inch in length — some tubercles 

 bear as many as twenty silvery hairs. Besides the silvery hairs, these 

 tubercles also bear many black bristles about a quarter of an inch in 

 length. On segment No. 2 the bristles are all reddish, and many hang down 

 over the head. On segment No. 3 the bristles are rust-red, with a very 

 few black ones, and a very few long silvery hairs. On segment No. 4 the 

 tubercles bear hairs and bristles the same as those on the other segments, 

 with the exception that they also bear rust-red bristles in numbers sufficient 

 to give the anterior portion over which these bristles extend a reddish 

 appearance. The row of tubercles posterior to spiracles bear mostly 

 rust-red bristles, but there are also a few black bristles and a few 

 long sweeping silvery hairs. All bristles below spiracles are bright rust- 

 red. Spiracles white. On the 5th and 6th segments and nth, 

 1 2th and 13th segments are two small blackish medio-ventral 

 tubercles and two sub-ventral tubercles bearing sparse rusty bristles, the 

 sub-ventral tubercles having more bristles, which are also longer. The 

 medio-ventral tubercles are close together, almost touching each other. 

 Thoracic feet black, shiny, tipped with brownish, and bearing sparse, 

 short rusty bristles. Abdominal feet and prolegs black, shiny, reddish at 

 ends, and also bearing short rusty bristles. 



On the 20th June this larva sjiun a cocoon and in due course 

 pupated, the moth emerging on the 29th July — length of pupal stage being 

 about 39 days. In the case of this specimen, the cocoon was much darker 

 than in those bred in 1899, this cause being largely due to the additional 

 number of reddish hairs from dorsal tubercles on segments 2, 3 and 4, 

 being interwoven. 



The above two descriptions of the mature larva differ slightly 

 in some respects, but this in all probability is due to variations which 

 doubtless occur in the species. 



Food Plant. — The larvje bred in 1899 were fed on lamb's-quarters 

 {Chenopodium album). The one taken this year fed on this plant, as also 

 on dandelion and plantain. 



