THE CANADIAN ENTOMOLOGIST. 145 



broadest part at the subdorsal tubercles on joint i. From the tubercles 

 on joint i to those on joint 2 the lilac is bordered by bright brownish 

 purple with a white line outside of this. In the middle of this diamond 

 is a little green shading. From the tubercles on joint 2 to the extremity 

 of the body is another parti-colored space lighter than the anterior one. 

 This gradually expands so as 'to include the stigmata on joint 7, then 

 decreases in width to the anterior part of the anal segment, expanding a 

 little in the middle of this, but contracting again at its posterior part. 

 The lilac of this is like the first, considerably suffused with green on the 

 back, and is bordered with brownish purple and white, though the colors 

 are a little lighter posteriorly. These two dorsal patches are not continu- 

 ous, but are separated on joint 2 by a distinct though small patch of 

 green. The posterior projections are mostly brownish purple, though 

 with somewhat greenish annulations, and when extended a ring of white 

 near the extremity. Head dark lilac. The body is a little thicker ver- 

 tically than from side to side. 



These were found feeding on willows (Salix nigra, I think) from 

 September 9th of last year to October 5th, nearly full grown. I noticed 

 that previous to the last moult tlie tubercles on joint i were covered with 

 little spines. 



They were kept in a room of moderate temperature during the winter 

 and transferred to the wood-house as soon as no more freezing was appre- 

 hended. The imagines began to appear April 30th, and the last emerged 

 June 3rd. 



Cerura borealis. — Of the same size, shape and general marking as the 

 preceding. The head is brown. The sides of the body are yellowish 

 green, the dorsal dark color not being so distinctly separated on joint 2 

 as in the first. The back, instead of being parti colored, is brown, some- 

 what suffused with green on the back at the widest places and darker 

 along the edges. Previous to the last moult the sides are bright green 

 and the brown a little less dull. 



Two of these were found feeding on wild cherry the 17th and i8th of 

 September, one nearly full grown which spun up Sept. 23rd. Only one 

 produced an imago, and that emerged April 21st. 



