PIERIN-K 59 



believe, iu Kaftraria by Coloiu'l Bowker) is singular in having the 

 hind-marginal spots of the hind-wings so greatly reduced on the 

 iipper 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 $ Zochalia most resembles on the 

 upper side the $ Severina, Cram., 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 $ Mescntina, 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 Kafiraria 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 piretty briskly along their edges, 

 or in open places on their outskirts, settling often on floAvers. 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 7th May. 



Localities of Picris Zochalia. 



I. Soutli Africa. 

 B. Cape Colony. 



a. AYestern Districts.— Knysna and Plettenberg Bay. 

 h. Eastern Districts. — Port Elizabeth. Grahamstown. King Wil- 

 liam's Town (TF. S. M. D' Urban). 



D. Kaff'raria Proper. — Moutli of Kei River and Bashee River {J. H. 



Bo'wker). 



E. Katal. 



a. Coast Districts. — D'Urban {J. H. Bowker). 



F. " Zululand." — Boisduval. 



K. Transvaal. — Potchefstroom District (?'. Ayres). Eureka, near Bar- 

 berton (C. F. Palmer). 



259. (10.) Pieris Mesentina, (Cramer). 



$ Papilio Mescntina, Cram., Pap. Exot., iii. pi. cclxx. fi". A, b (1782). 



$ Papilio Aurota, Fab., Ent. Syst., iii. i, p. 197, n. 614 (1793). 



S ? Pieris Mesentina, GoJt., Enc. Meth., ix. p. 130, n. 34 (181 9). 



(? ? „ „ BoisJ., Sp. Gen. Lep., i. p. 501, n. 95 (1836). 



