PIEEINiE. 135 
yellow mark preceding terminal disco-cellular spot usually larger than 
in ^, in one example much wider externally and prolonged almost to 
base.^ 
It is with much hesitation that I accord Gavisa specific rank, 
having in view the examples of both sexes of the variable Achme, 
which exhibit a partial blackening of the neuration as above mentioned. 
It seems, however, to stand out as a prominent race, and perhaps may 
breed apart from Achine, if we can judge by a single case of pairing 
observed by Colonel Bowker at D'Urban in December 1879. In this 
pair (sent to me by Colonel Bowker) the characteristic complete black 
neuration of the under side is equally well marked in both sexes. 
A typical specimen of Wallengren's Gavisa was kindly lent to 
me by Mr. Aurivillius, and it should be noted that it agreed with the 
author's description (loc. cit.) in having the black neuration of the 
under side limited to near the hind-margins, and in that respect more 
resembled the intermediate examples which I have referred to Achine. 
Gavisa seems limited to the eastern side of South Africa, the most 
western locality I have recorded for it being the right bank of the Kei Kiver, 
whence Colonel Bowker sent one of each sex in 1873. These two specimens, 
though strongly black-veined beneath (the $ especially), are less heavily black- 
marked above, and the $ has the under side of the hind-wings tinged with 
ochre-yellow. 
I met with this form of Teracolus not uncommonly in Natal, especially in 
the neighbourhood of D'Urban ; it had the ordinary flight and habits of the 
genus, and I observed it on the wing at the end of January and throughout 
February and March. ^ 
Localities of Teracolus Gavisa. 
I. South Africa. 
B. Cape Colony. 
h. Eastern Districts. — Fort Warden, Kei River {J. H. Boiuker). 
D. Kaffraria Proper, — Bashee River (/. H. Boivlier). 
E. Natal. 
a. Coast Districts. — D'Urban, Pinetown (J. H. Boioker). Tongaati 
River. Little Noodsberg. 
h. Upper Districts. — Estcourt (/. M. Hutchinson). 
G. "Swaziland."— The late E. G. Buxton. 
K. Transvaal. — Junction of Limpopo and Marico Rivers {A. TF. Erihs- 
8on). Lydenburg District {T. Ayres). 
^ As Geratacker {Glied. -Fauna des Sansihar-Gebictcs, Ins., p. 364) has noted, the $ 
figured by Reiche as that of his Bxole {loc. cit.) undoubtedly belongs to the Achine group, 
and I concur with Mr. Butler in thinking that it should be regarded as identical with the 
? of Wallengren's Gavisa. 
Having examined the types of Suhvenosus, Butl., from Victoria Nyanza, I find the $ 
maeparable from that of Gavisa, while the £ , though very near the corresponding sex of the 
species named, dififers in wanting the inner black edging of the apical patch, and in the 
feeble development of the inner-marginal blackish bar of the fore-wings and the costal one 
of the hind-wings. 
^ Five examples sent to me from D'Urban by Mr. A, D. Millar are dated 17th Decem- 
ber 1887. 
