THE CANADIAN ENTOMOLOGIST. 323 



colour black, with front segments rusty, slightly brighter than in last moult. 

 Head 1.5 to 1.6 mm. wide, jet black, shiny, slight furrow on vertex. 

 Transverse row of shiny black tubercles on all segments but head. On 

 the 2nd, 3rd, 4th and 5th segments, as in last moult, reddish hairs from 

 all tubercles, also some black and long silvery hairs. The hairs from 

 tubercles on the other segments are all blackish and silvery, the silvery 

 ones being long and slender ; all the tubercles on dorsal area, including a 

 series of which there is one tubercle posterior to each spiracle, have a 

 pearly white patch at summit. This is most conspicuous on the lateral 

 series — i.e., the third from the dorsum. Thoracic feet jet black, prolegs 

 black, tipped with rusty red. 



On the 3rd Sept. two larv?e were swollen, and by the morning of the 

 4th had passed the 5th moult. The remaining two moulted, one on the 

 5th, and the other on the 6th Sept. 



Stage VI. — Length at rest 24 mm., extended 26.5 mm. General 

 appearance a black hairy caterpillar, reddish rust colour on 2nd, 3rd and 

 4th segments. Head 1.9 to 2.1 mm. wide, jet black, shiny, slight furrow 

 on vertex. Long sweeping silvery white hairs from all tubercles, particu- 

 larly numerous on segments 5 to 13, inclusive. These segments also 

 bear short white bristles. On segments 2, 3 and 4 the bristles are a rusty 

 red, with only one (or two) long sweeping whitish hair from each tubercle 

 (these rusty red bristles giving the front part of larvae the reddish appear- 

 ance). On segment 5 the lateral tubercles also bear a it^ rusty bristles. 

 All bristles below stigmata on each side fawn coloured (in some specimens 

 almost white). Dorsal series of tubercles black, on segments 5 to 13, 

 inclusive, lateral and stigmatal tubercles whitish. Stigmata white and 

 very small. On segments 2, 3 and 4 the dorsal tubercles are whitish. 

 Thoracic feet and prolegs concolorous, prolegs tipped with a faint rusty 

 tinge. 



On the 1 8th Sept. two had passed the 6th moult, one having died 

 after the 5th moult. The remaining one moulted on the morning of the 

 20th, but died the same day. 



Stage VII. — Length at rest 32 mm., extended 39 mm. General 

 appearance a black caterpillar with rusty red sides, and covered with long 

 sweeping silvery hairs. Head 3.2 to 3.4 mm. wide, jet black, shiny, 

 bilobed. Face sparsely covered with bristles, those about the mouth- 

 parts short and rusty in colour, those from upper part of face fewer and 

 twice as long, and black in colour. On each side of face, on either side 



