968 DB. A. G. BUTLEE ON BUTTEEFLIES [NoV. 28, 



to base ; the remainder of these wings is smoky brown, slightly 

 cupreous, with a large ill-defined but distiuctly darker patch over 

 the end of the cell : secondaries cupreous brown, brilliantly glossed 

 with sky-blue between the second subcostal branch and submedian 

 vein ; a conspicuous orange anal spot between two short tails : 

 anal lobe small, silver-spotted and fringed with black ; body blackish ; 

 frons silvery whitish, collar with pale edges ; antennae annulated 

 with white, the club externally edged with tawny : under surface pale 

 fleshy buff, with the discoidal area of the primaries and the anal 

 patch of secondaries orange-ochreous ; the internal area of the 

 primaries blackish grey towards the base, white slightly opalescent 

 beyond, the marking on the wings much as in C. esmeralda, silver 

 with black margins ; body below white. Expanse of wings 26 

 millim. 



The female is rich copper-brown with white fringes, and an 

 orange spot on the secondaries between the tails, as in the male ; 

 the under surface similar to that of the male : size uniform. 



(S , Slopes of Nthatha Hill, Kitwi, 4700 feet, 31st December, 

 1898 ; $ , Plains N. of the Tana Eiver, 4500 feet, Kikuyu, otb 

 January, 1899. 



C. tamaniha, according to Walker, expands one inch and one 

 line (or 28 millim.), and is therefore the largest species in the 

 genus ; the primaries are described as being shot with blue at the 

 base and on the hind half, and the secondaries as blue, with a 

 narrow brown border ; " an orange spot adjoining the tail, into 

 which it extends, bordered on the outer side with glittering chaly- 

 beous." These characters do not at all correspond with those of 

 C. esmeralda (which Prof. Aurivillius has unaccountably placed as 

 a synonym of it), and differ considerably from those of the present 

 species. Many years ago (1870) I saw the type, but I cannot 

 pretend to remember exactly what it was like. I am, however, 

 quite certain that Walker's measurement is rather under than 

 overstated : the specimen is, of course, incorrectly described as a 

 female. C. esmeralda not only differs from C. pseudozeritis in 

 having only one tail to the secondaries, but in the absence of the 

 brown clouding on the under surface of these wings. It is mere 

 guesswork to suppose that a small insect like this from Natal is 

 at all likely to be identical with one from Somali-land, or even 

 that the latter is likely to be the same as one from the western 

 shore of the Eed Sea. It is quite possible that there are many 

 species of Chloroselas scattered over Africa, and that, ten years 

 hence, the species hitherto confounded will be generally regarded 

 as amongst the best marked of all. Structurally, the species may 

 at present be separated by the tails of the secondaries as follows : — 



Species with two tails. 

 Small — C. pseudozeritis Trimen. 

 Large — C. azurea Butler. 



Species with one tail. 

 Small — C. esmeralda Butler. 

 Large — 0. tamaniha Walker. .^ 



