of the Genus Teracolus, Swains. 469 
since the days of Hewitson! It only shows how utterly 
impossible it is to write a correct synonymic paper upon any 
genus without first arranging the species, having due regard 
at the same time not only to seasonal variation, but to geogra- 
phical distribution. Never since I first arranged the genus 
was it in such a perplexing state of chaos as during Mr. Mar- 
shall’s few visits to it with a view to “clearing up” the 
synonymy. ‘The natural result is that the “ clearing up”’ has 
resulted in partial failure. 
61. Teracolus gavisa. 
Anthopsyche yavisa, Wallengren, Lep. Rhop. Catfr, p. 13 (1857). 
Teracolus hero 9, Butler, P. Z. 8. 1876, p. 150, pl. vi. fig. 12 (part.). 
Teracolus subvenosus 9, Butler, Ann. & Mag. Nat. Hist. ser. 5, vol. xi. 
p. 105 (1885). 
Ranges from Natal to the Victoria Nyanza along the 
eastern littoral. 
This species differs from 7. achine in its much bolder 
marking in all its seasonal phases, the reduction of the 
crimson apical patch on the primaries of the males, and the 
well-defined black veining on the under surface of the wet- 
season form. “7. subvenosus 9” is a typical female of 
T. gavisa, but “ T. hero ?” a singularly heavily marked and 
buff-tinted female of the intermediate phase. 
I should regard 7’. gavisa as at least subspecifically distinct 
from YZ. achine, at any rate until it has been proved by 
breeding to be a mere varietal development of that species. 
It can always be easily distinguished in all its phases. 
62. Teracolus omphale. 
Pieris omphale, Godart, Enc, Méth. ix. p. 122 (1819). 
Anthocharis theogone, Boisduyal, Spec. Gén. Lép. i. p. 575 (1836). 
Anthopsyche procne, Wallengren, Lep. Rhop. Caffr. p. 323 (1857). 
Teracolus omphaloides, Butler, P. Z. 8. 1876, p. 151. 
Sra corda, Méschler, Verh. zool.-bot. Ges. Wien, xxxiii. p. 278 
T ie complexivus, Butler, P. Z. S. 1885, p. 770. 
Ranges along the eastern side of Africa from Somaliland 
to the Cape. 
T’. omphale is a very variable species, the most heavily 
marked of the wet-season forms occurring in Nyasaland, 
where the marginal spots on the upper surface of the second- 
aries frequently unite into a broad continuous border; the 
discal black belt on these wings in the male varies enormously, 
sometimes broad from abdominal margin to outer border, 
sometimes slender, sometimes barely indicated. In the inter- 
