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 T. 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, King, Symb. Phys., Ins. pi. vii. figs. 9-11 (1829). 

 Teracolus arenicolens, Butler, Ent. Month. Mag. xxi. p. 81 (1884;. 



Arabia and Nubia. 



In the Grodman and Salvin collection were four examples 

 of typical T. 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 T. arenicolens. They differ from rny 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. S. 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. 



