31 
white butterflies assume darker colors when inhabiting elevated 
localities or higher latitudes. (Grote.) 
g. Virginiensis .—Male expands 1.7 inch. 
Upper side white, less pure than Oleracea and much obscured by 
grey brown scales, which are scattered over the whole surface, but 
are dense on apex, costa and basal half of primaries, at the base 
and along the subcostal and median nervues of secondaries; a grey 
patch also on costa of secondaries. 
Under side white, the nervures all bordered with grey brown, most 
conspicuously on sub-median of both wings and the branches of this 
nervure on secondaries; shoulder pale orange. 
Body above blue-grey, beneath white; palpi white, tipped with grey; 
antennae blackish above,finely annulated with white below; club black, 
tipped with yellowish. 
Female, expands 1.9 inch. 
Similar to male, the surface usually still more obscured. 
This species is allied to Oleracea , from which it may bereadily 
distinguished by the shape of its wings, which are longer and nar¬ 
rower; by their texture, which is more delicate, and by the constant 
presence of grey scales over the surface. In the Kanawha district it 
replaces Oleracea which is yet unknown there. It is not uncommon 
in the month of May, frequenting open woods rather than gardens, 
and in this respect differing in habit from the allied species. I have 
never met with it later than June, though Oleracea in the northern 
States, is most abundant after that month and continues breeding till 
the early autumn frosts. (Edwards.) 
2. P. Rapje. 
This species has been already fully described, the following are 
descriptions of the varieties. 
a. YreJca. —Size and form of Fieris rapce\ Male , upper side white, 
base sprinkled with black atoms extending along the costa of the 
primaries as far as the end of the cell; a narrow, black, terminal 
line at the apex, and below this, a few scattered black specks; a 
rounded black spot on the medio-superior interspace, midway be¬ 
tween the cell and the margin. Secondaries with a small black 
spot on the costa, at two-thirds its length from the base; fringes 
white, exj>anse 1.88 inches. 
Underneath, the apex of the primaries is pale ochrey-yellowish; 
an additional small black spot is in the medio-inferior interspace, 
otherwise as on the upper surface. Secondaries pale orchrey-yellowish, 
thickly strewn with grayish or greenish-brown atoms, especially con¬ 
densed, towards the base; costa yellowish-orange. 
Body above black, with scattered whitish hairs; below white. 
Antenme black, ringed with white; club tipped with white. 
Female differs in having a large triangular apical patch, brownish- 
' black, of which the lower portion is densest, upon the primaries, 
and in the enlargement of their central black spot, and also in 
that of the costal one upon the secondaries. 
Below, the primaries, as in the male y the hind wings much more 
yellowish. ' (Reakirt.) 
