Genus Brenthis 
which is characteristic of the latter genus, is altogether lacking 
in Brenthis. 
Egg. —The eggs are subconical, almost twice 
as high as wide, truncated at the top, and 
marked with thirteen or fourteen raised longi¬ 
tudinal ridges connected by a multitude of 
smaller cross-ridges. 
Larva. —The caterpillars are not noticeably 
different in their general appearance from those 
of the genus Argynnis , except that they are 
smaller and generally not as dark in color as 
the larvae of the latter genus. They feed, like 
the caterpillars of Argynnis , upon violets. 
Chrysalis.— The chrysalis is pendant, about 
six tenths of an inch long, and armed with Fig. 90.—Neuratiori 
two rows of sharp conical tubercles on the enlarged? 1 ™ 5 Brenthls> 
back. 
(1) Brenthis myrina, Cramer, Plate XV, Fig. 1, $ ; Fig. 2, 
6 , under side; Plate V, Figs. 12-14, chrysalis (The Silver- 
bordered Fritillary). 
Butterfly.—The upper side of the wings is fulvous; the black 
markings are light, the borders heavy. The fore wings on the 
under side are yellowish-fulvous, ferruginous at the tip, with the 
marginal spots lightly silvered. The hind wings are ferruginous, 
mottled with buff. The spots, which are small, are well sil¬ 
vered. Expanse, 6 , 1.40 inch; $, 1.70 inch. 
Egg. —The egg is conoidal, about one third higher than wide, 
marked by sixteen or seventeen vertical ribs, between which are 
a number of delicate cross-lines. It is pale greenish-yellow in 
color. 
Caterpillar. —The caterpillar has been carefully studied, and 
its various stages are fully described in “The Butterflies of New 
England,” by Dr. Scudder. In its final stage it is about seven 
eighths of an inch long, dark olive-brown, marked with green, 
the segments being adorned with fleshy tubercles armed with 
needle-shaped projections, the tubercles on the side of the first 
thoracic segment being four times as long as the others, cylin- 
drical in form, and blunt at the upper end, the spines projecting 
upward at an angle of forty-five degrees to the axis of the tubercle. 
12Q 
