18 THE CANADIAN ENTOMOLOGIST. 



On the 15th May most of the larvre were swollen and ready for the 

 first moult ; on the i6th and 17th ihey cast their skins. 



Stage II. — Length, 5.5 nnn. Head 0.7 mm. wide, brownish yellow; 

 on each cheek there are two large dark brown round spots. In some 

 specimens these two spots are almost black, and the whole face is 

 sparsely mottled with small spots of the same colour; ocelli dark; 

 mouth-parts reddish ; antennae faintly reddish. There is now a great 

 difference between the larvae in this stage and in last stage. A distinct 

 white dorsal stripe is now present, also a lateral stripe of the same 

 colour, and a wide stigmatal band, which is double on some segments. 

 The whole dorsal surface of the larvfe, just after moulting and for a day or 

 so, is dark green, but afterwards becomes less dark in colour, the skin 

 below spiracle.^ being still paler. In some specimens the skin between 

 the lateral stripe and the stigmatal band is quite dark, almost black. 

 The cervical i-hield is concolorous with body. The feet are all pale 

 green, the fir^t pair of abdominal prolegs aborted. The thoracic feet 

 bear black plates exteriorly. 



On the iQih May several were swollen, and by the morning of the 

 20th four had moulted. The remaining specimens had all moulted 

 by the 21st. 



Stage III. — Length, 10 mm. The general appearance of the larvae 

 in this stage is much the same as just after last moult. Head i.o to i.i 

 mm. wide, slightly bilobed, the two spots, one on each cheek, in all 

 but a itw specimens are now joined together, and appear as one 

 large conspicuous mark shaped like a dumbbell. The face is shiny 

 and of the same brownish yellow as before ; the brownish blotches, as in 

 last stage, are also present over the whole face ; ocelli black ; mandibles 

 reddish. Body of a rather geometrid appearance, colour above spiracles 

 dark grayish green, below spiracles lighter green. The dorsal and lateral 

 stripes are faintly bluish. The tubercles are black and very small. The 

 stigmatal band now appears as a double stripe, joined together at the 

 junction of each segment, and resembles a chain of links. The space 

 between the double stigmatal stripe and the lateral stripe is darker than 

 the dorsal area, and in some specimens this space is almost black, giving 

 the appearance of a wide, black, lateral band. The si)iracles are pale, 

 ringed with black. Cervical shield concolorous with body. 'J'horacic 

 feet and prolegs concolorous with venter, bearing short pale hairs. 

 Claspers of abdominal and anal feet reddish. The first two pairs 



