of the Genus Teracolus, Swains. 503 
87. Teracolus gaudens. 
Teracolus gaudens, Butler, Ann, & Mag. Nat. Hist. ser. 4, vol. xviii. 
p. 486 (1876). 
Abyssinia. 
The type is a wet-season male, and for some time I held 
Mr. Marshall’s opinion, that 7. arenicolens from Arabia was 
clearly its dry-season form. This, however, I have now 
proved to be an error, based upon a false identification of 
T. chrysonome—an Arabian species and distinct from the 
Somali insect. 
88. Teracolus chrysonome. 
Pontia chrysonome, Klug, Symb, Phys., Ins. pl. vii. figs. 9-11 (1829). 
Teracolus arenicolens, Butler, Hint. Month. Mag. xxi. p. 81 (1884). 
Arabia and Nubia. 
In the Godman and Salvin collection were four examples 
of typical 7. chrysonome (received from Mr. Druce, who 
purchased them from the Kaden collection) ; these correspond 
closely with Klug’s figures, and are undoubtedly the wet- 
season form of J’. arenicolens. They differ from my supposed 
T. chrysonome from Somaliland in the much less defined 
markings upon an opaque pale sulphur ground on the under 
surface, and on the upper surface in the slightly more slender 
and sometimes imperfect blackish irregular stripe across the 
primaries ; the males also with the basal white area chalky, 
much less suffused with ash-grey, and extending to the end 
of the discoidal cell. 
89. Teracolus helvolus. 
Teracolus chrysonome, Butler (not Klug), P. Z, S. 1885, p. 768. 
Teracolus helvolus, butler, P. Z. 8. 1888, p. 94. 
Somaliland southward to Mombasa and Kilima-njaro. 
T. helvolus is the dry-season phase of the species ; but it is 
doubtful whether it does not appear simultaneously with the 
wet-season phase. Our Somali specimens, however, were 
not taken together, the dry form having occurred in January 
and the wet form in April. 
90. Teracolus aurigineus. 
Teracolus aurigineus, Butler, Ann. & Mag. Nat. Hist. ser. 5, vol. xii. 
p. 103 (1883). 
Teracolus venustus, Butler, P. Z, S. 1888, p. 94. 
From the Albert Nyanza eastwards to Mount Kenia, the 
Victoria Nyanza, and Kilima-njaro, and southwards to Nyasa, 
