PIERIS I. 
PIERIS BECKERII, n. sp. 4—7. 
Primaries produced apically, slightly excavated on costal and hind margins. 
Male. Expands 2 inches. 
Upper side pure white, the texture of secondaries slighter than that of pri- 
maries, discovering the spots of under surface; base of wings not powdered with 
black as in allied species ; primaries have the apical half of hind margin bordered 
by small black patches or clusters of scales, diminishing in size to middle of mar- 
gin; anterior to these two similar sub-apical patches and a third in upper median 
interspace; on the arc a dense black subrectangular spot (not reaching the costa) 
with a central white streak. Secondaries immaculate. Fringes white except against 
the apical spots, there black. 
Under side white; the nervules at apex and on upper hind margin bordered 
by black scales and suffused with greenish yellow; the spot on interspace black 
and as on upper side ; cellular 1 spot enlarged, its base broadened and posterior edge 
excavated. 
Secondaries have all the nervures and their branches yellow; those termina- 
ting on hind margin edged by broad bands of yellow green reaching to middle of 
disk and connected anteriorly; three large spots of same color about the cell, two 
being at the outer angles, and one above and reaching the costa; another large 
triangular subapical spot on costa; the nervures at base also banded with green; all 
these bands and spots slightly sprinkled with black scales. 
Body above covered with grey hairs; beneath, abdomen yellowish, thorax 
white; legs white; palpi white, grey on upper side and at tip; antennae white 
above and at base below, beyond brown ; club black nearly covered with rows of 
white scales ; tip pale fulvous. 
Female. Expands 2 inches. 
Primaries less produced and broader than in male ; same shade of color ; the 
marginal spots enlarged and extended to second branch of median ; in addition to 
the three submarginal spots, which are also enlarged, is another in submedian in- 
terspace and a streak below this along inner margin ; the cellular spot much en- 
larged, rhomboidal, with slight central streak; secondaries have a patch on costa 
and four on the marginal nervules commencing at and posterior to subcostal ; also 
an interrupted submarginal stripe opposite cell, posteriorly indistinct; under side 
