46 THE CANADIAN ENTOMOLOGIST. 



from two (on the smallest) to six finely serrated, radiating bristles which 

 are about twice the length of the tubercles. Duration of this stage eight 

 to nine days. 



After the First Moult — Length (taken a short time before the second 

 moult), 15 mil. Color pea green. Tubercles and bristles, mandibles, 

 palpi and antennae, a spot about the eyes, a stripe on each side of the 

 clypeus, the legs and a spot on the outside of the prolegs, black. Second, 

 third and fourth segments each with four black spots on the posterior 

 edge and a row of black spots on each segment after the head, on the line 

 of and behind the stigmatae. Duration of this stage five to seven days. 



After the Second Moult — Length (taken soon after the second moult) 

 20 mil. Color pea green with a bluish tint upon the dorsum. Black 

 markings as in preceding stags. Duration of this stage four to five days. 



After the Third Moult. — Length 35 mil. Color pea green, lighter on 

 the dorsum. Marked with black as in the two preceding stages. All the 

 tubercles with the basal portions blue, except those on the second seg- 

 ment and the lower one on each side of the third to the sixth segments 

 inclusive. Duration of this stage six to nine days. 



After the Fourth Moult — Length 50 mil. The head at the time the 

 larva escaped from the egg-shell was proportionally large, but during' the 

 succeeding stages it did not grow so fast as the other parts of the larva, and 

 at the beginning of this stage, but more especially at its close, it was pro- 

 portionally small. Duration of this stage ten to twelve days. 



Mature Larva — Length 76 mil. — about three inches. Thickness 

 between the segments 13 mil, of largest part of segment 15 mil. 



Head pea green, sparsely clothed with fine yellowish hairs. Mandi- 

 bles, outer joints of antennae and palpi, spot about the eyes, two spots on 

 the gular (these may have occurred in the previous stages, but were not 

 observed), and a stripe on each side of the clypeus, black, the latter some- 

 times wanting. Basal joints of antenna; and palpi and the labrum green- 

 ish blue. General color of the body pea green, rather lighter than the 

 head, and lighter above than on the sides, with the faintest tinge of blue 

 between the segments. Last joint of the legs and claw black. Stigmata; 

 oval, white, surrounded by a fine black line. 



The tubercles were greatly changed at the fourth moult, both in form 

 and color. The first and lowest on the second .segment is small, conical, 

 black and surmounted by a few short, stout, black spines. The second is 



