THE CANADIAN ENTOMOLOGIST. 191 



After 4th Moult. — Length .8 inch ; in three days reaches maturity. 



Mature Larva.— Length i inch ; cyUndrical, stout ; armed with 

 seven rows of long, tapering spines, one medio-dorsal, and three on either 

 side ; the dorsals beginning at 5 and ending at 12, the upper laterals run 

 from 3 to 12; the second laterals from 3 to 13, but on 4 the spine is below 

 the row, and in line with the spiracles ; the lower laterals from 5 to 12; 

 from a little below the summit of each spine rise from three to five slender 

 branches, about a central one which is a prolongation of the spine itself 3 

 the spines of the dorsal and upper lateral rows are largest and longest, and 

 each has five branches, besides one or two lower down, of medium length, 

 and some small spines, each branch and spine ending in a bristle ; the 

 spines of second lateral row are of medium length, with four branches ; 

 and those of the lower row are shortest and have three and four branches ; 

 in the green and white varieties of the larvse all the spines are whitish or 

 yellow, as well as the branches ; in the black, the spines are yellow, mostly 

 black-tipped, the branches as well, but the spines of the first lateral row 

 are sometimes black to their bases ; so those of second row are sometimes 

 wholly, sometimes but partly black ; 2 has a collar of six simple spines 

 and two others are upon each side, in vertical line ; the color of body 

 varies much ; some examples are cream-white, some greenish-white, with 

 almost no markings, or the markings are obsolescent ; others are velvet- 

 black, the dorsum crossed by white stripes upon the posterior edges of the 

 segments ; with two white divergent bars coming to an angle at the front 

 of each dorsal spine, and running to the anterior edge of the segment ; 

 and with a similar oblique bar from each spine of the first lateral row on 

 the lower side ; along the base is a raised yellow stripe, and from this up 

 to the second laterals the ground is crossed by abbreviated white stripes or 

 patches, particularly on the last half of the segments ; above this the side 

 is black ; but individuals vary in the extent of this black area ; sometimes 

 the ground color is vinous-red ; under side greenish, or honey-yellow, 

 according to the color of upper side ; the spiracles black in broad white 

 rings; at the base of the second laterals from 9 to 11, or from 7 to 11, is 

 usually a fulvous or orange patch, varying in extent ; feet greenish or 

 black ; legs greenish or brown ; head rather square, higher than broad, 

 with high vertices ; in the light examples the color of head is dull pink, in 

 the dark ones it is black, shining, sometimes with a forked whitish stripe 

 down the front ; on each vertex a short, stout process, cylindrical, com* 



