46 THE CANADIAN ENTOMOLOGIST. 



is one and three-fourth inches, and thickness nearly one-half an inch. 

 The color of the middle dorsal line is bluish-green, and of the lateral 

 walls, a beautiful pea-green. The dorsal and lateral dots and blotches 

 have entirely disappeared, as well as those upon the pro-legs and spine- 

 bearing tubercles. 



The tubercles upon the ist segment are a light blue, bordering upon 

 pearl ; concolorous with those upon the lateral and sub-lateral abdominal 

 rows. Their spines still retain the primary black. The 2nd and 3rd 

 segments have dark purple tubercles above, while the 4th, 5th, 6th, 7th, 8th, 

 9th and loth pairs of dorsal tubercles, are a deep lemon. The nth segment 

 has one large central tubercle, equal in size to those upon the 2nd and 

 3rd segments, which are larger than the others. The 12th and 13th 

 dorsals are a pale blue. 



The pro-legs and true legs are yellowish green, except the lower part of 

 the distal joints of the latter, which are similarly colored with the claws. 



Upon each side of the caput, near the base of antennae, are two dark 

 spots. General color of head, pea-green ; mouth appendages, light blue. 



The under surface of the caterpillar is a light green. 



July 4th — The last moulting occurs. The length is two and one-half 

 inches, and the thickness one-half an inch. As soon as the skin is 

 changed, the dorsal tubercles of the 2nd and 3rd segments, are yellowish 

 brown, with a lower circle of eight black papillae without spines, and a 

 circle of six spines above, surrounding a central one. Fourth pair of 

 dorsal tubercles yellow, with eight black warts near the base, and a circle 

 of six black spinules above, surrounding a central terminal one ; 6th, 7th, 

 8th, 9th and loth each with two horizontal spines ; 5th, with five spines 

 arranged in the form of a pentagon; nth, yellow, with a- circle of six 

 spines, near the base of which, anteriorly, are several irregular black 

 blotches. 



On the anterior margin of the ist segment, in line with the dorsal 

 tubercles, exist four blue wart-like prominences. 



The 2nd and 3rd lateral tubercles are light blue, each furnished with a 

 circle of six spines, surmounted by a central spine ; 4th, a circle of four 

 and one central ; 5th, 6th, 7th, 8th, 9th and loth, blue, with one central 

 spine. 



Sub-lateral tubercles, below spiracles, same size as the laterals, hairy, 

 2-spined, with rudiments of a second pair in some cases. Below these, 



