FAMILY BRUSH-FOOTED BUTTERFLIES. 75 



transverse series of silvery spots, besides those at base and apex. 

 Expanse If inches. 



Caterpillar. — Head dark metallic green, the summits rounded. 

 Body spined, mottled with dark green, purple, and luteous ; spines 

 leathery, blackish fuscous or partly luteous, those on the back of 

 the first thoracic segment several times longer than the others. 

 Length f inch. 



Chrysalis. — Dark luteous, the abdomen darker, the whole 

 marked with fuscous ; laterodorsal tubercles of abdomen (very 

 prominent on the third segment) uniformly conical, those of 

 first segment smaller than those of second. Length ^ inch. 



The eggs, which are tall sugar-loaf- shaped, with sixteen 

 or seventeen prominent vertical ribs, are olivaceous yellow 

 and are laid singly on the leaves or stems of the food-plant 

 or on immediately adjoining vegetation ; also, according to 

 some observers, dropped loosely on the wing; they hatch 

 in from six to ten, sometimes fourteen, days. The cater- 

 pillars feed by night upon violets, and hide by day, and are 

 very quick in their movements and easily disturbed. The 

 chrysalis hangs from seven to eleven days. The haunts 

 and flight of the butterfly are the same as those of B. 

 hellona and its life-history probably identical; certainly it 

 passes the winter in the caterpillar state, both just from, 

 the Q^g and half grown, but the lethargic features noticed 

 ill the preceding species have not been observed, though 

 they probably occur, in this; the butterfly, however, is a 

 few days later than B. lellona in appearing in its successive 

 broods in a given locality. 



Three other species of Brenthis occur in the northern parts of our 

 district, two in the high north, B. cliaridea and B. freija, both of 

 them circumpolar insects, sometimes taken in Canada not far from 

 our border ; and B. montinus, known only from the subalpine dis- 

 tricts of the White Mountains of New Hampshire, and thought b^ 

 some to be merely a variety of B. charidea, 



