THE CANADIAN ENTOMOLOGIST. 



After fifth moult : Length .9 inch ; color black and gray-yellow, the 

 dorsal band brown-gray. 



Mature Larva. — Length 1.4 inch ; stout, the segments well rounded ; 

 the pattern of the markings similar to that o{ Atlantis; a broad dorsal 

 band which fills the space between the two dorsal rows of spines, in color 

 a deep yellow, cut throughout by a black line ; between dorsals and mid- 

 dle row a narrow gray band, and a short band of similar color between 

 the base of each dorsal spine and the spine next in advance on the 

 middle row, these bands edged with whitish ; the spaces between 

 brown-black ; below this area the sides to base are gray, mottled, with a 

 shade of reddish-yellow, most decided in the middle part 5 feet black, pro- 

 legs green-brown, ; the spines as in Atlantis; of the two upper rows gray- 

 green to base, a little yellow about base of those of middle row, and on 

 2 and 3 half up stem ; those of lower row also yellow, except the upper 

 half ; the two dorsals on 2 are turned forward, but are not longer than the 

 rest ; head sub-cordate, the vertices rounded ; color dull brown-black in 

 front, dull yellow about top and behind. From fifth moult to pupation 

 15 days. 



Chrysalis. — Length .9 inch; breadth across mesonotum, .24, across 

 abdomen, .26 inch ; general shape of this Group of the genus, but long 

 and slender ; head case square, bevelled on both sides to a cross ridge, 

 which is a little arched ; the corners rounded ; mesonotum long, moder- 

 ately prominent at rear and rounded, sloping to the front and rounding 

 down to head case ; carinated, the sides convex ; abdomen conical ; the 

 wing cases prominent ; color in shades of brown, the anterior parts dark 

 and reddish, mottled, on mesonotum, with yellowish ; on the tongue and 

 antennae cases reddish-yellow streaked and specked with dark brown ; 

 wing cases yellow-brown, with dark streaks along the nervules, and a 

 small spot at end of cell ; the abdomen has on the front of each segment 

 a dark brown band, somewhat broken, and serrated ; the rear part of 

 the segments pale gray, mottled with patches of a darker shade. 

 Duration of this stage 12 days. 



This species is found in the Rocky Mountain region from Colorado to 

 Montana, and was taken in Br. America by Captain Geddes, at Blackfoot 

 Reserve (C. E., xv., 222). 



