42 THE CANADIAN ENTOMOLOGIST. 



After First Moult. — Length at 12 hours .18 inch; shape as before; 

 color gray-green, the dorsum of 12, 13 discolored brown or blackish, and 

 a sub-dorsal patch of same hue on S and 1 o ; thickly covered with fine 

 tubercles as at first stage ; the rows of larger tubercles as before, ivory 

 white, bell-shaped, the hair or process from top brown or black ; the basal 

 tubercles large, each with its crescent of smaller ones on lower side ; head 

 higher than broad, narrowing at upper part, depressed at suture ; color of 

 the upper front greenish, over mandibles yellow-white, at the back gray- 

 green ; on each vertex a low duplex black process, the outer part larger 

 and higher than the other, each with a black short bristle at top ; at back, 

 on either side the suture, a duplex small yellow process and others down 

 the side of face at back ; over the front minute tubercles as at first stage, 

 and in addition three large conical white tubercles on either lobe, each 

 three in triangle with base above, so arranged that four tubercles cross the 

 forehead in line. To next moult four to five days. 



After Second Moult. — Length at 12 hours .25 inch ; shape as before ; 

 tuberculated as before ; color gray-brown, discolored on posterior seg- 

 ments as before ; head shaped as before ; the processes on vertex larger, 

 triplex, shining black, two being in line across front, the outer one larger, 

 the third lying behind and between the others ; the back and the front 

 face armed as before. To next moult five days. 



After Third Moult.— Length at 24 hours .34 inch j shape, armature 

 and color as before ; there is much variation in the extent of the black ; 

 on one example 6 and n were quite black dorsally, on sides of 8, 9, 10 

 black patches, on sides of 3, 4, 5 paler black ; another was pale black on 

 12, 13, a very little of same on 5 and 6, and the sides of 8, 9, 10 pale 

 black ; head as at last previous stage, the front greenish-black, the vertex 

 processes black ; of the four cones across front the outside ones were 

 black, the others white, with brown rings at base. To next moult four 

 and five days. 



After Fourth Moult. — Length at 24 hours .7 inch ; after five days was 

 fully grown. 



Mature Larva.— Length 1.3 inch; stout anteriorly, thickest at 3, 4, 

 tapering on dorsum and sides to 13; the end of 13 rounded and the dor- 

 sum much curved; color gray-green, segment 2 darker green; usually 

 marked by patches of black on dorsum or sides of segments after 6, but 

 some examples have little, or it is pale colored, and others have none at 



