PIERIS I. 
“My specimens agree exactly with the excellent figures” of Vol. I., But. N. A. 
It is not necessary therefore to re-figure Beckerii on account of variation, but to 
make the distinction between it and Chloridice patent, I give figures of the upper 
and under side of Beckerii $ (8); of upper side of the 9 (9); both from Vol. I.; 
and the corresponding wings of Chloridice $ (10), 9 (11), from the examples in 
my collection. Chloridice is a much smaller species, and looks more like an An- 
thocaris than a Pieris. My examples of Beckerii measure $ $ 2 ; 2.1 inches; 9 9 
2; 2.2 inches. Of the $ Chloridice , one is 1.6 in. the other 1.8 in.; the 9 1.6 
inch. The males Chloridice have a cluster of confluent black spots at apex of 
fore wing and on upper part of hind margin, and these are also confluent with the 
spots of the inner row, so that nearly the whole apical area is black and trian¬ 
gular, much as in certain species of Anthocharis, as A. Ausonides, for example, 
only the black is intense in the Pieris and pale in the other. The discal spot is 
particularly characteristic of an Anthocharis, being a narrow, curved bar, with a 
fine white line running through it lengthwise, along the arc of cell. In all re¬ 
spects this bar is very close to that of Anth. Hyantis. 
In Beckerii , the apical spots are smaller and shorter in proportion, do not 
touch each other, and are entirely separated from the spots of the inner row. 
The spots of the two rows are parallel, and there is nothing of the triangle. And 
the discal spot is a large, nearly square patch, of quite another shape from that 
of Chloridice, with the white streak considerably thickened in the middle, not 
a uniform line. Beckerii S, on the upper side, looks in all respects more like $ 
Pieris Occidentalis than it looks like Chloridice. Comparing the females: Chlo¬ 
ridice has the spots at apex so run together that merely along the hind margin in 
middle of each interspace, is any white seen; the inner row of spots are lost 
altogether in the black area. This area ends below squarely at the second me¬ 
dian interspace. The discal spot is of same shape as in the male, but twice as 
broad. 
In Beckerii 9 there is a marginal series of comparatively small lanceolate sep¬ 
arated spots, six in number, and there .is an inner, or extra-discal row of four 
nearly equal large black spots in line across the wing, nowhere touching the 
marginal spots; and the discal spot is very large and rhomboidal. On the under 
side of primaries of Beckerii, in both sexes, are two black spots belonging to the 
inner row, one in the upper median, the other in sub-median interspace. (Fig. 
8.) In the females these are large, in the males they vary, and in one of my 
examples the lower spot is wanting. Dr. Hagen writes of his examples of Beck¬ 
erii, that in the females the two spots are very marked and black, but the males 
never have these spots so large, sometimes faint, sometimes wanting. Dr. Hagen 
has examined figures of Chloridice in Fischer, Esper, Herbst, Hiibner, and Bois- 
