THE CANADIAN ENTOMOLOGIST. 85 



side a sharp point, which sends back a straight hair ; color of body 

 whitish-yellow, in a few hours changing to pale green ; head sub-globose, 

 flattened and depressed at top, broadest at base, a little broader than high, 

 the vertices rounded, and on each a slight protuberance, with long curved 

 hair ; a similar hair a little below and nearer the suture, and two rows of 

 shorter hairs across face, four in upper, six in lower row ; surface corru- 

 gated ; color yellow, somewhat brown-tinted. Two days later, as the 

 body was changing to green, the head changed to yellow-green. Duration 

 of this stage 6 to 8 days. 



After ist Moult. — Length .26 inch; cylindrical, tapering from 2 and 

 ending in two long, slender, blunt-tipped tails ; color of body bright 

 green ; much covered with whitish tubercles mostly arranged in longitud- 

 inal rows, one being on either side the medio-dorsal line, one sub-dorsal, 

 one infra-stigmatal, and in the intervening spaces are many separated 

 tubercles ; each tubercle ends in a short, stiff white hair ; under side, legs 

 and pro-legs green ; head obovoid, truncated, well rounded on front and 

 sides, depressed at top, the vertices rather high, each bearing a tapering, 

 roughly tuberculated process or horn, which is green with red tip ; the 

 face much covered with white, conical, separated tubercles, arranged in 

 vertical rows ; ocelli black ; color of head green, rather darker than body. 

 To next moult 7 to 8 days. 



After 2nd Moult. Length .44 inch ; shape as at second stage ; color 

 light green ; the tubercles of the subdorsal line more prominent, more 

 yellow, and run from horns to tails ; another such row along basal ridge ; 

 head shaped as before, bright green, the horns long, tapering, green with 

 red tips. To next moult 9 to 15 days, depending on the weather. 



After 3rd Moult. — Length .52 inch ; shape and color as at preceding 

 stage. To next moult 6 days, in case of a single larva which died soon 

 after the moult. All others have hibernated in stage following 3rd moult. 



After 4th Moult, in Spring. — Length .6 inch ; color yellow-green ; in 

 addition to the dark green medio-dorsal stripe is another sub-dorsal, and 

 a second on mid-side, both narrow, scarcely more than lines. In 1 1 to 

 20 days the larvae reached 5th moult. 



After 5th Moult. — Length i inch, greatest breadth at segments 2 and 

 3, 13-100 inch, then tapering to extremity ; color as before. In about 

 ten days the larvae reached maturity. 



