50 SOUTH-AFRICAN BUTTERFLIES. 



disposed to think that Alha makes its appearance on the wing only in the 

 ■winter or dry season.^ 



Some dated specimens since received from Mr. Alfred D. Millar tend to 

 confirm this view, a ^ having been captured on the 15th August and three $ s 

 and a $ on the 17th September 1887. It is not impossible that Alba may be 

 the winter brood of Pigea. 



Localities of Pieris Alha. 



I. South Africa. 

 E. Natal. 



a. Coast Districts. — D'Urban {M. J. M'Ken,' J. II. Boioker). 

 D'Urban District {T. Ay res). INIalvern (/. //. Bo^vlcer). Pine- 

 town ( W. Morant). Mouth of Tugela River (J. H. Bowker). 



254. (5.) Pieris Simana, Hopffer. 



^ 5 Pieris Simana, Hopff., " Monatsb. K. Akad. Wissensch. Berl., 1855, 

 p. 640, n. 13;" and Peters' Reise IMossamb., Ins., p. 354, t. xxiii. 

 tf. Z,a[S\ 5, 6[$](i862). 



(J Pieris Pigea, Wallengr., K. Sv. Vet. -Akad. Ilandl. ; Lep. Rhop. Caffr., 

 p. 7 [nee $ ]. 



i:xp. al., ($) I in. 9^-11 lin. ; ($) 1 in. 11 lin. 



Very closely allied to Charina, Boisd. 



^ Greenish-tvhite with a bright pearly lustre ; hasal and 7iiarginal 

 blackish markings quite as in Charina. Under side. — Almost without 

 marking, as lohite as wppcr side ; the hind-iving and ajMx of fore-wing 

 very rarely with the faintest tinge of yellowish. Fore-iving : terminal 

 nervular black dots exceedingly minute ; terminal disco-cellular fuscous 

 dot very minute ; in Querimba specimen (apud HopfFer), a good-sized 

 rounded, discal, fuscous spot, like that in ^, between third and second 

 median nervules. Hind-ioing : irroration either wholly wanting or 

 extremely faint and limited ; spots of basal area and discal row very 

 vaguely and only partly represented, the more constant and less indis- 

 tinct being the spots below median nervure and the costal spot of 

 discal row ; terminal disco-cellular spot distinct ; costa at base with 

 more distinct orange-yellow edging line. 



^ More yellowish than ^, and rather more so than $ Charina ; 

 blackish markings generally more developed than in Charina. Fore-iving : 

 basal dusky suffusion wider ; spots of costal streak beyond middle 

 confluent, not separable ; hind-marginal spots enlarged and confluent 

 into a quite continuous, rather wide border, with acute inward nervular 

 projections. Hind-wing : hind-marginal nervular spots larger than in 

 Charina, sub-sagittiform, acutely-pointed outwardly. Under side. — 



1 Colonel Bowker has since forwarded three pairs taken in copula at Malvern, near 

 D'Urban, in May 1888. Two of the ? s are of the pale, more glossy, under-side colouring, 

 while the third presents a deep ochre-yellow hue, and has the upper side of the hind-wings 

 generally but unequally tinted with pale ochre-yellow. 



