PIERIS I. 
PIERIS NELSONI. 6, 7. 
Pieris Nelsoni. 
Male. — Expands 2 inches. 
Upper side white; costal margin of primaries and bases of both wings dusted 
black; at apex of primaries and to second branch of median, serrated black 
patches on ends of the nervules; and beyond, an extra-discal transverse row of 
small spots, of which two are deep black; namely, one in lower sub-costal, the 
other in upper median interspace ; another spot in sub-median interspace is repre¬ 
sented by a cluster of scales; on the costal margin, the upper spot is joined to 
the black marginal edging by a stripe of black ; on arc, a sub-oval black spot, 
through which runs a whitish streak; fringes white. 
Under side of primaries white, with a faint greenish-yellow tint over apical 
area; the markings repeated, those about apex diffused, gray-brown ; the inner 
row gray-brown, the lower spot, on sub-median interspace, as distinct as the 
rest. 
Secondaries white, faintly tinted .greenish-yellow; all the nervures and branches 
broadly bordered with gray-brown, especially those which include the cell, and 
the branches of median and the sub-median; indeed the interspaces are nearly 
closed up below the cell; beyond the disk these borders are joined by serrations 
in the interspaces, most conspicuous from outer angle to upper branch of median, 
but continued across the median interspaces. 
Body above covered with long gray hairs, abdomen black on both dorsum and 
sides; under side of thorax yellow-gray, abdomen white ; palpi white with many 
black hairs; antennae black; club black, tip green. 
From 1 $ taken by Mr. J. W. Nelson, at St. Michael’s, Alaska, June, 1881. 
Unfortunately no ? was taken. The species is near Callidice, Esper, but dif¬ 
fers in the coloration of the under side, which is gray-brown instead of green, 
and on upper side in the shape of the cellular spot, which is a short oval, in 
stead of a long curved bar, as in 2 $ 2 ? European Callidice before me (also in 
