THE CANADIAN ENTOMOLOGIST. "zol 



the latter with a black dot outwardly posteriorly to each piliferous spot, 

 the black dot inconspicuous in the paler ones. Spiracles black. Very 

 little or no shading of dark on lateral part of 9 on pale forms ; head as 

 before. 



Mature larva. — Length, 2,50 inches. More robust than at the 

 beginning of this period. Width of head, .15 inch ; of joint 2, .25 inch ; 

 middle of the body, .35 inch \ nearly cylindrical, venter a little flattened 

 and the lateral fringe makes it appear more so than it really is ; character 

 of markings about as last described ; in the light forms there is little 

 variation in the shade of the light and dark stripes, the general effect 

 being a pale lilac gray. The piliferous spots are very pale, but little 

 darker than the ground colour. The dark stripes, as is usual, are 

 composed of dots varying from a purplish-red to a reddish-black, those on 

 the pale stripes simply averaging lighter, elevated part of the dorsal of 9 

 very pale orange. Head with the upper part yellow-orange. Venter as 

 before. The dark forms have the greater average of dark dots in the 

 dark stripes, and the ground colour in these stripes is darker, especially 

 at the incissures, making sharp contrast between the light and dark 

 stripes, but the piliferous spots are the same. Duration of this period 

 four days. 



Chrysalis. — Length, 1.30 inches ; wing and tongue case to posterior 

 part of joint 5, .55 inch ; depth through 5, .32 inch ; through 4, .t^I inch ; 

 through 3, .34 inch ; through 2, .32 inch ; nearly cylindrical, tapering 

 gradually back from 5, anterior part rounded, antenna case extending as 

 far back as the wing case ; punctures of abdomen small and shallow ; 

 cremaster so blunt and short as scarcely to be called conical, depressed 

 ventrally, corrugated irregularly but mostly longitudinally, ending in a 

 few hooks of varying lengths. Colour dark chestnut-brown, covered with 

 a white bloom. Duration of this period from 44 to 53 days. 



Three spun in the upper corner of the box in which they were raised 

 two together in one common cocoon, the rest in the lower part, mostly in 

 the corners and edges just above the dirt, on the sides of the box and 

 among the refuse twigs and leaves where these came against the sides of 

 the box, others among the leaves of the food-plant. The cocoon is 

 thicker and more compact and firm than that of most species, those in the 

 upper corners of the box being smooth inside, firm and mingled with 

 loose web outside. 



I'he eggs from which these larvae were raised were sent me from 



