PIERIS I. 



"My specimens agree exactly with the excellent figures'' of Vol. I., But. N. A. 

 It is not necessary therefore to re-figure Beckeril on account of variation, but to 

 make the distinction between it and Chlorldice patent, I give figures of the upper 

 and under side of Beckerii ^ (8); of upper side of the 9 (9); both fi-om Vol. I.; 

 and the corresponding wings of Chloridlce $ (10), 9 (11), from the examj^les in 

 my collection. C/ifon'tZice 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 C/dorldice 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. Aiisonides, for example, 

 only the black is intense in the Pieris and pale in the other. The discal spot is 

 particularly chai'acteristic 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 i , on the upper side, looks in all respects more like $ 

 Pieris Occidentcdia than it looks like C/doridice. 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 

 nearl_y equal large black spots in line across the wing, nowhere touching the 

 marginal spots ; and the dis(;al 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 sul^-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, Hlibner, and Bois- 



