THE CANADIAN ENTOMOLOGIST. 131 



dorsal line very pale yellow, almost white ; reddish tinted between the 

 joints ; subdorsal line duller ; head black. Duration of this period, four 

 days. 



AftQ.r Fifth Moult. — Length, .65 inch. Marked much as before 

 but darker \ ground colour lilac-grey, but so obscured by the black, 

 enlarged dorsal tubercles and mottlings as to be almost black ; lateral 

 tubercles as before ; dorsal stripe bright creamy-white ; legs and head 

 black ,; prolegs orange ochreous ; lateral hairs grey, dorsal black. 



Mature Larva. — Length, .95 inch. Cylindrical; ten tubercles to 

 each joint ; a small one close to the dorsal stripe, each with a tuft of 

 spreading hairs that are studded with points like the forked point of a 

 lightning rod, but shorter in proportion to the hairs. Colour mostly as 

 at the beginning of the stage ; the dorsal tubercles show orange on the 

 top ; the subdorsal line paler than the ground colour ; abdomen and feet 

 pale. Duration of this period, eleven days. 



Chrysalis. — Length, .55 inch. Diameter through joint i, .16 inch ; 

 through joint 3, .18 inch ; length of wing cases, .28 inch, reaching almost 

 to posterior part of joint 5 ; head rounded ; two tubercles above the 

 origin of the antennae that are hairy, also two hairs each to two lesser 

 tubercles between the origin of antennae ; terminal joint conical, scarcely 

 any depression to cremaster ; a terminal series of spreading hooks ; 

 smooth ; thorax and wing cases very slightly corrugated ; a slight raised 

 ring to anterior part of each abdominal joint. Colour, brown-black. 

 Duration of this period, from eleven to twenty-two days. 



This species, like most of the Arctians, is a general feeder, but eats 

 some things in preference to others. Among the several plants put into 

 the breeding cage, clover seemed to be preferred, and they were fed upon 

 that through most of their growth. As will be seen by the figures given, 

 the time from the egg to the imago is from forty-eight to fifty-nine days. 

 The eggs were deposited July 16, 1889, and the last moths came out Sep- 

 tember 12 the same year. There is with us an earlier brood of the moths 

 coming out in May, making three broods in a season, though in the 

 northern part of the United States, if it is found there, there are probably 

 only two broods. The last brood of larvae, like its allies, hibernates, and 

 of course this lengthens the period from egg to imago over that of the 

 two summer broods. Like other Arctia larvse, these are very active 

 when disturbed, running rapidly and hiding under the food in their cage. 

 They also hide in this way when not feeding. 



