PIERIN.'E. 57 



mucli rounder hind-marginal spots, not acuminate inwardly (or united 

 by the festooned line often found in Zochalia). On the under side 

 (4) the yellow colouring is much brighter ; ( 5 ) the fore-wing has a 

 basal flush of orange, and (6) only four separated submarginal spots 

 instead of a continuous band ; while in the Idnd-iving (7) the nervures 

 are much more narrowly black, and (8) the cellular striic and festooned 

 submarginal line are wanting. 



From Ccdypso the butterfly is readily separated by its smaller size 

 and much narrower black border of the fore-wings, as well as, on the 

 under side, by its black nervures and very much smaller submarginal 

 black spots of the hind-wing, and the want in the same wing of the 

 conspicuous terminal disco-cellular black spot. In the ^ there is no 

 resemblance to that of Calypso, which has a broad dusky border, and 

 ground suffused with yellow and grey, — much like those presented by 

 the darker $ s of Gidica, Boisd. 



The male above described was sent to me by Mr. Walter Morant in 1869, 

 and I then made a description and drawing of the specimen, Avhich the captor 

 believed was taken near Pinetown, in Natal, where he was resident at the 

 time. The 5 here described and figured Avas taken by the late Mr. M. J. 

 M'lven at D'Urban in 1866 ; but being unset, and, I believe, on the same pin 

 with several other butterflies, had escaped notice in a collection received by the 

 South- African Museum. 



It occurs to me as not impossible that this may be the butterfly referred to 

 Calypso by Boisduval in the Appendix to Delegorgue's Travels (p. 5 86), with 

 the habitat of Port Natal, — the 9 O'jygia having been taken for the (J Calypso. 

 No South- African specimens of the latter species have ever come under my 

 notice. 



Localities of Pieris Ogygia. 



I. South Africa. 

 E. Natal. 



a. Coast Districts. — D'Urban {M. J. M'Ken). Pinetown {W. 

 Morant). 



258. (9.) Pieris Zochalia, Boisduval. 



Pieris Zochalia, Boisd., Sp. Gen. Lep., i. p. 506, n. 100 (1836). 

 (J $ ,, Trim., Khop. Afr. Aust., i. p. 37, n. 22 (1862). 



Plate X. fig. 6 (?). 



Exp. al, (^) 2 in. ; (g) i in. i i lin.-2 in. 3 lin. 



^ White, with black markings. Fore-iving : costa from base nar- 

 rowly black-edged ; basal half of wing with a hrilliant pearly gloss ; 

 a short black terminal disco- cellular bar from costa, contracted in its 

 middle portion ; a deep black band on hind-margin, narrowing to a 

 poiut at anal angle, irregularly excavate on its inner edge, and gene- 

 rally containing five sub-triangular white spots, of which the fourth is 

 occasionally almost obsolete. Hind-ioing : generally a very short, thin 



