3(1 THE CANADIAN ENTOMOLOGIST 



there is a patch of clear pale olive, without black dots ; the dark stripes 

 on posterior part of joint 9 olive tinted, giving the joint a darker shade. 

 Head striped longitudinally with dull lilac and white, the latter broken 

 and irregular ; the top has the lilac replaced by black, with the orange 

 dots of the preceding stage present ; a short black stripe on each side 

 from the clypeus. Venter white, the joints bearing legs with black 

 patches tinted with orange, the others with orange patches. Piliferous 

 spots the ground color, but a little rose tinted. 



Mature larva. — Length 2.50 inches, width of middle of body .30 

 inch, of head .20 inch; depth of middle of body .25 inch, of head .15 

 inch. Color characters the same as at the beginning of period ; the three 

 anterior ocelli black, the three posterior brown. Duration of this period 

 15 days. 



Chrysalis. — Length from .90 to .95 inch ; lateral diameter, through 

 joint 5, .33 to .35 inch ; dorso-ventral diameter, through the same joint, 

 .28 to .30 inch ; the cause of the difference being a lateral expansion of 

 the wing cases ; only a slight dorsal depression on joint 1 (referring of 

 course to the abdominal joints) ; length of tongue and wing cases .60 to 

 .65 inch, both extending to posterior part of joint 5 : from joint 5 taper- 

 ing regularly to the posterior part of the terminal joint, this ending 

 abruptly in the cremaster ; anterior part rounded, this and the tongue and 

 wing cases moderately corrugated or wrinkled ; abdominal, joints punc- 

 tured ; the whole covered with a white or glaucous secretion. Duration 

 of this period 28 to 30 days. 



In this species, as in most I have bred, the eggs continue to hatch for 

 several days after the first ones emerge from the shell, these later speci- 

 mens being so much later in their pupation and in their other changes, 

 when the hatching is not too long delayed. In some cases these belated 

 examples are weaker than the earlier ones, and either die before reaching 

 maturity, or produce smaller or imperfect imagines. For these reasons I 

 have given the changes and characters of the earlier individuals. I be- 

 lieve, however, that in the woods the delayed hatching produces the late 

 specimens that are to be found in good condition in September and often 

 later. 



The eggs from which these observations were made were obtained 

 October 29, 1886, by confining a dilapidated female with hickory bark and 

 leaves, the supposed food plant. They began to hatch April 21, 1887, 



