.'124 THE CANADIAN ENTOMOLOGIST. 



of apex of frontal triangle, there is a small shallow depression. The 

 prominent rusty bristles from dorsal tubercles on segments 2, 3 and 4 

 have disappeared, with the exception of a transverse patch from tubercles 

 on 2nd segment, which turn down abruptly over the face, and very few on 

 3rd segment, all the remaining bristles being black. All tubercles whitish. 

 Black bristles and long sweeping silvery white hairs from all tubercles 

 above spiracles. On 2nd and 3rd segments very few silvery hairs ; on 

 remaining tubercles of dorsal area on segments 4 to 12, inclusive, about 20, 

 or more, long sweeping silvery hairs. The row of tubercles posterior to 

 spiracles bear long, bright, rusty red bristles from each tubercle, together 

 with a few black bristles from upper half of tubercle, and also a very few 

 long silvery hairs. All bristles below spiracles bright rusty red. 

 Spiracles white. On the 5th and 6th and nth, 12th and 13th segments are 

 two small blackish medio-ventral tubercles and two sub-ventral tubercles 

 sparsely covered with 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 shiny, black, tipped 

 with brownish, prolegs blackish, reddish at ends. 



On the 9th Oct. the two remaining larvje had spun a slight cocoon, 

 and by the i6th Oct. had changed to pupse. 



The cocoon is very thin, made of white, almost cobweb-like silk, 

 with all the long white and some of the other hairs from larva interwoven. 

 Pupa is plainly distinguishable through the cocoon. 



Pupa. — Length 27 mm., width at widest part 8.5 mm.; black. 

 Abdomen minutely pitted ; thorax and wing-cases wrinkly. Reddish 

 on abdominal folds between segments. Cremaster rough, short but 

 broad, hollowed below, terminating with a bunch of about a dozen and a 

 half short, capitate, rust-red bristles. 



On the 1 6th June, 1900, a single specimen of the mature larva was 

 found at Cumberland, Ont., to which place an excursion of the Ottawa 

 Field-Naturalists' Club was held. Thjs following description was taken : 

 Length 42 mm., extended 50 mm. General appearance, black cater- 

 pillar with rust-red sides, rust-red colour on 2nd, 3rd and 4th 

 segments, and covered with long sweeping silvery hairs. Head, width 

 3.4 mm., 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 



