142 THE CANADIAN ENTOMOLOGIST. 



After 2nd Moult — Length .24 inch, color chocolate-brown, the lower 

 lateral spines pale yellow at base and for one third up ; both other rows 

 have the bases more indistinctly yellow and then mostly on the outer 

 sides, the inner being nearly or quite black ; spines otherwise shining 

 black, the bristles black ; head subcordate, flattened frontally, the vertices 

 rounded, and at top of each on front side a little conical black process ; 

 minute processes or tubercles are scattered over the face, the hairs spring- 

 ing from them ; color shining black. To next moult 4, 6 and 9 days, 

 according to the state of the weather. 



After 3rd Moult — Length .4 inch ; color dark velvety brown ; the 

 spines black ; all of the lower laterals yellow at base and for about one 

 third up ; the upper laterals distinctly yellow at base on the anterior 

 segments, the yellow gradually fading to the last segments ; the dorsals 

 also distinctly yellow on anterior segments, the last wholly black ; the 

 dorsal spines on 2 are directed forward, but are no longer than others ; 

 head as at next previous stage, black in front, but yellow behind ; all 

 yellow is reddish, or honey colored. 



At this stage there was some variation in individuals in the color of the 

 spines. One had all distinctly yellow at base except the dorsals on 2 and 

 12, which were black. To next moult 5 to 8 days. 



After 4th Moult — Length .6 inch j color velvet-black ; lower laterals 

 wholly bright yolk-yellow ; upper laterals same on anterior half, the 

 remainder duller yellow ; dorsals bright yellow on anterior half, but after 

 6 less so, and on 9 to 12 black ; on 2 dorsals wholly black ; in line with 

 the dorsal spines on segments from 3 to 1 1 two gray dots ; head as before. 



Another larva had all three rows of spines largely reddish-yellow, fully 

 half way up from base ; the last two pairs of dorsals shading into brown. 

 To 5 th moult 4 to 8 days. 



After 5th Moult — Length 1.1 and 1.2 inch. Reached maturity in six 

 to eight days. 



MATURE LARVA — Length 1.8 inch at rest, 2 inches in motion ; 

 greatest breadth at rest .35 inch ; color velvety-black, under side chocolate- 

 brown ; between each pair of dorsal spines from 3 to 1 1 two gray dots 

 transverse ; the spines throughout slender, beset with short black bristles ; 

 the bases of all spines reddish-yellow, and for about two thirds up, the rest 



