106 THE CANADIAN ENTOMOLOGIST 



on either side of the midrib near the centre of the leaf. The in- 

 dividual egg is lemon yellow in colour with an apparently smooth 

 surface. It is elliptical or narrowly oval in outline with broadly 

 rounded extremities and measures 0.95 mm. long by 0.45 mm. 

 — 0.55 mm. broad. Each egg is attached to the leaf surface at one 

 of its extremities and inclined usually at an angle of 30 degrees. 

 At the attached end there is a thin, irregularly disc-shaped expanse 

 of material which fastens the egg to the leaf surface. A number 

 of egg masses were observed and the numbers of eggs in 22 masses 

 were counted with the following results: 



Maximum number 30 



Minimum " 12 



Average " 19-f 



Two other unusually small masses were noted which contained five 

 and seven eggs respective!}'. 



As the egg matures, the three pairs of dark spots on the thoracic 

 dorsal surface and the dark spots on the abdominal, dorsal and 

 lateral surfaces of the embryonic larva show distinctly through the 

 egg shell. Previous to the emergence of the lar\'a the shell of the 

 egg splits along the lateral surface from the apical end half way, or 

 slightly more, to the base and the larva gradually works its way 

 through this opening. When the larva first emerges, it is dirty 

 white in colour but changes very rapidly on exposure and soon is 

 dark in appearance. 



Five larval stages were observed as follows. — First stage: re- 

 cently emerged larva; body elongate tapering posteriorly; general 

 body colour dirty white; head, and dorsal and lateral surfaces of 

 prothorax black, legs and body at outer side of legs dark brown; 

 meso- and metathorax, each with a pair of dorsal black spots and 

 single dorsolateral tubercles. Each abdominal segment marked 

 dark brown as follows: a pair of prominent dorsal spots, a pair of 

 lateral prominent spots, with a smaller dot more or less connecting 

 them, three less prominent transverse ventral spots forming a 

 broken line. On the posterior abdominal segments the dorsal and 

 lateral spots are connected, forming longitudinal bands. Dark 

 spots on dorsal and lateral surfaces bearing one or more fine, com- 

 paratively long hairs and the latter also noted on head and thorax. 

 Width of head 0.3 mm.; length of body 0.9 mm. Second stage: 



