190 THE CANADIAN ENTOMOLOGIST. 



in the black examples all tubercles are black ; on 2 is a chitinous band 

 with four small spines in cross row ; besides the seven principal rows, 

 there is a row of minute spines over legs and feet ; feet black ; legs oliva- 

 ceous ; head round, depressed at lop, the vertices a little produced, each 

 bearing a short, thick process, with short spines at top ; color of head and 

 processes dark brown ; many black hairs over surface springing from fine 

 tubercles. Duration of this stage 3 days in April, 2 in August. 



After 2nd Moult. — Length .3 to .33 inch; same shape; color dark 

 olive-brown or black-brown or reddish-brown, individuals varying ; the 

 spines longer, and at one-third from the top give off branches ; the posterior 

 end of each segment after 2 crossed by two or three fine white lines ; in 

 front of the medio-dorsal row of spines are two oblique divergent whitish 

 bars, one such bar from base of each spine in ist lateral row on outer 

 side ; the spines vary largely, some larvae having all the spines black, some 

 have the dorsal and ist lateral rows on 5th, 7th, 9th segments white, the 

 rest black ; some have white from 4 to 1 1 ; some have white on 9 only ; 

 on 2 a collar of black simple spines ; head broader than high, the top 

 rather square, not much depressed, the processes larger, but similar to 

 preceding stage, crowned with six points, one in middle, the rest about it; 

 surface glossy black, with many simple spines, of different sizes, usually 

 all black, but some examples show a few white among the black ; each 

 with long hair. To next moult, in May 3 days, in August 2 days or some- 

 what less. 



After 3rd Moult. — Length .38 to .4 inch ; color black, crossed on 

 the posterior end of each segment with two or three lines or stripes of 

 white, sometimes more or less macular ; according to the breadth of these 

 bands the larva is quite white or otherwise ; the oblique marks on dorsum 

 as before, more conspicuous ; a yellow band runs along base in line with 

 lower lateral spines, and the posterior part of each segment above this 

 band shows an oblique bar, and some white spots and points ; spiracles 

 black in broad white rings ; the spines long, and branching as before ; the 

 medio-dorsal row are always white ; those of ist lateral row are usually 

 white, but sometimes on 3 are black, or partly black ; some examples 

 have the 2nd lateral row wholly black, others white, or some of the last 

 spines are parti-colored ; on 2 is a collar of simple white spines ; head as 

 before, the white spines predominating largely. To next moult in May 3 

 days, in August 2 days or somewhat less. 



