PIERIS I. 
PIERIS SISYMBRI, 1-5. 
Pieris Sisymbri , Boisduval, Ann. Soc. Ent. de France, 1852, p. 284. 
Male. —Expands 1.3 to 1.6 inch. 
Upper side white with a faint yellow tint; bases of wings dusted with black ; 
primaries have the costal margin gray for three fifths the length from base ; the 
ends of the nervules from apex to second branch of median covered by black 
bars, which diminish gradually in length down the margin; midway between 
margin and cell is a transverse black band, interrupted opposite cell, and running 
from costa to upper median interspace; on the arc a black bar, indented on outer 
side ; secondaries immaculate ; fringes of both wings white ; black at the ends of 
the nervules. 
Under side same color; the markings repeated, but paler or gray, the bars 
along margin of primaries greenish-gray. 
Secondaries have all the nervures and branches broadly edged on both sides 
with greenish-gray, somewhat interrupted on the extra-discal area, and across 
this is a series of black serrations lying on the nervules, pointing towards and 
parallel to the margin. 
Body gray above, thorax white below, abdomen yellowish; legs white ; palpi 
white with black hairs in front; antennae black above, whitish beneath; club 
black, the tip orange. (Figs. 1, 2.) 
Female. — Expands from 1.6 to 2 inches. 
Upper side like the male, but usually the extra-discal band is extended to sub¬ 
median interspace, the second median interspace being immaculate; on under 
side the markings are as in the male, sometimes slight and pale, but often heavy, 
greenish-black ; the nervures and branches of secondaries in many examples 
buff. (Figs. 3, 4.) 
Vail Flava. Female. — Both surfaces pale yellow. (Fig. 5.) 
