ANTHOCARIS II. 
Chrysalis. — Length .9 inch. Slender, cylindrical, thickest in the middle, 
tapering therefrom pretty evenly, the extremities being of nearly equal size, the 
anterior a little flattened; viewed laterally, the figure is that of a highly obtuse- 
angled triangle, the sides equal, the base nearly straight, there being only a 
slight wave at thorax; color gray-brown, covered with fine longitudinal darker 
strGciks 
This species is common in California and Colorado. It is also brought from 
Utah, Arizona, and Montana, and from Vancouver’s Island. The late Robert 
Kennicott sent me, some years ago, a specimen taken by himself on the Yukon 
River, a very high latitude for a species of so delicate a genus. In the At¬ 
lantic States, the allied A. Genutia is very rarely found north of latitude 40 , 
twenty degrees south of the Yukon River. Of the habits of this species Mr. 
Henry Edwards writes : “ It is one of the very first to appear in spring, and 
as early as the end of February, if the weather be moderately warm, may be 
seen sporting over the flowers of Brassica, Radix, and other cruciferous plants. 
It is local, but where found, occurs in some abundance. Through the whole of 
the San Joaquin, Alameda, and Napa valleys it is common, though only in the 
early season, for it is single-brooded, and its existence seems to terminate about 
the end of April.” 
The larva was discovered by Mr. Mead, in Colorado, in 1871, and from one 
sent by him the drawing on the Plate was made. Mr. Mead wrote, 28th June, 
as follows : “ At Turkey Creek Junction there were many eggs and some larvae 
of Ausonides to be found, the latter feeding on the flowers and seed-vessels 
of a cruciferous plant. The eggs were long, ribbed longitudinally, and in color 
light yellow. The larvae are solitary, and are seen stretched at length on the 
stem or seed-pods of the plant.” 
From a chrysalis also sent by Mr. Mead, the butterfly emerged at Coalburgh, 
in the spring of 1872. 
There is a striking resemblance between the larva of Ausonides and that of 
Pieris Protodice, a butterfly very common in the Southern and Western States. 
Their larvae are more alike in color, form, and markings than often happens be¬ 
tween species of the same genus. The chrysalids, on the contrary, may be said 
to have no resemblance whatever. 
Ausonides, as remarked by Dr. Boisduval, is scarcely distinguishable from 
Ausonia, Hubner, a species found in the regions bordering the Mediterranean, 
and subject to much variation, especially in the degree of mottling of the under 
side of secondaries. The alpine var. Simplonia, Freyer, seems nearest the usual 
American type, though we have also individuals in which the markings approach 
Belia, Esper, considered to be another variety of Ausonia. A comparison of 
