48 THE CANADIAN ENTOMOLOGIST. 



The body above is of a deep, rich green color, with patches andi 

 streaks of dull white ; the second segment is smaller than the head, and 

 thickly covered with whitish tubercles ] the third segment, which is dull 

 whitish green, is raised considerably above the second, and has a flat 

 ridge above with a long brownish horn on each side of it thickly covered 

 with very short white and brown spines ; the fourth segment has a similar 

 ridge, with a small tubercle on each side, each tipped with a bunch of 

 short whitish spines. All the segments behind the fourth have two 

 tubercles, one on each side, of varying size and in a line with the long 

 horns on the third segment, each being covered with a cluster of whitish 

 spines. The tubercles on seventh, eighth, tenth and eleventh segments 

 have a streak of white at their base, and each segment behind the fourth, 

 excepting the ninth, has several smaller tubercles of a bright blue color. 

 A large whitish patch covers nearly the whole of the ninth and parts of 

 the eighth and tenth segments, and another of a similar character covers 

 the second, third and part of the fourth. A Avhite stripe extends along 

 each side, close to the under surface, from the fifth to the terminal seg- 

 ments, in which is set a small cluster of whitish spines about the middle 

 of each segment, from the sixth to tenth inclusive. On each side of the 

 seventh, eighth and tenth segments is an elongated blackish spot, just 

 above and behind the spiracles ; the latter are rather large, oval, and of a 

 brownish black color. 



The under side is whitish green, with a central dull white stripe on the 

 hinder segments ; the feet are brown, ringed with brownish black ; the 

 prolegs pale greenish, faintly tipped with brown. 



The chrysalis, fig. 7, d, has a curious mixture of colors — brown, grey, 

 flesh color and white — and is characterized by a remarkable, thin and 

 almost circular projection sticking out from the middle of its back, which 

 has been likened to a Roman nose. 



There are two broods of this insect during the year ; the larvae of the 

 second brood scarcely attain half their growth when they hybernate, and 

 complete their developement the folloAving spring. On the approach of 

 inclement weather the little caterpillar constructs a curious case in which 

 to dwell, see c, fig. 7, which has been likened to the leaf of a miniature 

 pitcher plant ; having first, by means of silken cords, firmly secured the 

 stem of the leaf it uses to the twig on which it grows. These cases are 

 frequently found upon willow bushes, and also on the American poplar 

 during the winter season. 



