59 
believe, in Kaffraria by Colonel Bowker) is singular in having the 
hind-marginal spots of the hind-wings so greatly reduced on the 
u^'per side that they are smaller and more linear in form than the cor- 
responding spots are on the under side. 
In the pattern of the black borders, and the size and shape of the 
white spots which they enclose, the $ Zochcdia most resembles on the 
upper side the $ Severina, Oram., but is at once distinguished by the 
terminal disco-cellular bar from costa, which is very black and sharply 
defined, and nearly as broad as in the $ Mesentina, Cram. In both 
sexes the width of the basal pearly gloss in the fore-wings is a distinctive 
feature, as well as the thin not diffused blackish neuration of the under 
side of the hind-wings. The $ differs greatly from the same sex of 
both Severina and Mesentina in the hind-marginal border of the hind- 
wings, which, instead of being very broad, dusky, and almost spotless, is 
almost as narrow and lightly festoon-edged inwardly as in the The 
tendency to have the upper side of the hind-wings only yellow — and 
that of a deep clear tint — is also a special character of the ^ Zochalia 
among its immediate congeners. 
This species appears to be peculiar to South Africa, and to be more pre- 
valent in the Cape Colony than elsewhere. I found it numerous in wooded 
places at Knysna and Plettenberg Bay, and not uncommon near Grahamstown. 
In Xatal I did not meet with it, and only a few examples have reached me 
from that Colony and Kaffraria Proper. A single specimen was sent from the 
Transvaal by Mr. T. Ayres. It is quite sylvan in its haunts, never being found 
far from woods, but chiefly delighting in flying pretty briskly along their edges, 
or in open places on their outskirts, settling often on flowers. I have captured 
it from the end of September to the middle of February, and once took a speci- 
men (at Knysna) as late as the 7 th May. 
Localities of Pieris Zochalia. 
1. Soutli Africa. 
B. Cape Colony. 
a. Western Districts. — Knysna and Plettenberg Bay. 
h. Eastern Districts. — Port Elizabeth. Grahamstown. King Wil- 
liam's Town {W. S. M. D' Urban). 
D. Kaffraria Proper. — Mouth of Kei River and Bashee River (J. H. 
Boiuker). 
E. Natal. 
a. Coast Districts. — D' Urban (/. H. Bowker). 
P. " Zululand."— Boisduval. 
K. Transvaal. — Potchefstroom District {2\ Ayres). Eureka, near Bar- 
berton (C. F. Palmer). 
259. (10.) Pieris Mesentina, (Cramer). 
$ Papilio Mesentina, Cram., Pap. Exot., iii. pi. cclxx. fif. a, b (1782). 
$ Papilio Aurota, Pab., Ent. Syst., iii. i, p. 197, n. 614 (1793). 
S ? Pieris Mesentina, Godt., Enc. Meth., ix. p. 130, n. 34 (1819). 
? „ 5, Boisd., Sp. Gen. Dep., i. p. 501, n. 95 (1836). 
