THE CANADIAN ENTOMOLOGIST. 211 



after the first of this period, As before, the body is cylindrical, with eight 

 rows of tubercles, supporting tufts of spreading hairs, the most of these 

 black vvith a few gray hairs round the outside of each cluster ; the length 

 of the hairs on the middle of body about the diameter of the body, those 

 on the posterior part of the body about twice as long, the pencil from 

 joint 1 3 about four times as long as those on the back of the middle 

 joints ; tubercles still black ; head amber, with a prominent blackish spot 

 in the centre of the anterior part of each cheek. Duration of this period 

 57 f^ays. 



Chrysalis. — Length .45 inch; length of wing and tongue cases .25 

 inch, extending almost to posterior part of joint 5 ; depth of joint i .14 

 inch; of joint 2 .15 inch; of joint 3 .16 inch; from this it tapers 

 slightly to joint 7, from this more abruptly to the end ; no hooks at anal 

 extremity ; cylindrical, anterior end rounded, the head sloping to the 

 antennae cases at a little less than 90 degrees ; wing and antennas cases 

 slightly roughened, abdomen slightly punctured. Color, chestnut brown, 

 antennae cases and outer edges of wing cases a little paler. Duraftion of 

 this period from 205 to 234 days. 



There is but one brood in a season, and unlike most of our insects, it 

 has two periods of what might be called suspended activity. One of 

 these, the pupal period, is common to all insects imdergoing complete 

 transformations ; the other, just before pupation, an unusual one, unless^ 

 with a species that hibernates in the larval state. By looking over the 

 different periods, we find them as follows : — 



Egg period .... 6 days. 



ist larval " .... 4 " 



2nd " " 3 " 



3rd " '' 7 " 



4th " " .... 6 " 



5th " " .. .57 " 

 After the fourth moult the larvae grew to their full size in a few days, 

 and then remained in a quiescent state, unless disturbed, during the 

 remainder of the period. They passed the last moult July 25th, but did 

 not pupate till September 20th. I could not see that they ate anything 

 during this time of about 50 days, the period of our dry, hot weather, 

 though fresh food was furnished them every day. At first T thought thi? 



