CEYLON BUTTERFLIES. 185 
The clasp of alexis agrees with that of inermis, to which it is 
apparently closely allied, but the tegumen is entirely distinct. 
The clasp of buileri is the same as that of chromus, but, again, 
the tegumen is very different. See Pl. 8, figs. 1 to 4. 
The upper sides of the males are similar, but the under sides 
are very distinct, the most prominent difference being that 
butlert has a broad, sharply defined, white band on the lower 
wing, and alexis has a narrow diffuse one. The female of 
butlert has, as a rule, two small white spots on the upper side of 
the fore wing in 2 and 3, of which the lower is much the 
smaller, but both these spots are often absent. In this case 
the 2 can only be distinguished from the g by the absence of 
the sex mark. The female of alexis has two spots in all my 
specimens, of which the lower is the larger. It has also 
occasionally a minute dot in 6. 
Mr. Hannyngton sent me a chromus 2 from Coorg. It is 
larger than our Ceylon forms, the spots in 2 and 3 are much 
larger, and there is a spot in 6 anda small dot in 7. The band 
on the hind wing is broader than that of alexis, but is not 
sharply defined like that of butleri. 
They suddenly appear in great numbers, generally during 
the north-east monsoon, and I am of opinion that they 
“ flight.”’ In October, 1916, I noticed great flights of large 
Hesperiide on several evenings just before dark, all going 
south. I put on two native collectors and tried myself to 
catch specimens, but owing to the bad light and the speed of 
the flight I secured none. They can be walked up in the 
daytime in the tea or jungle, but then only fly a short distance, 
and settle on the under side of a leaf with their wings closed 
over their backs. They visit flowers in the early morning or 
evening or on a dull day, and I have known them come to my 
moth lamp at night. 
Both are extremely plentiful all over Uva up to the highest 
elevations, and I have specimens of butleri from Kandy 
and Deniyaya, and of alexis from Kandy, Jaffna, and 
Mannar. 
Alexis : ““ Numerous in low jungles of North Matale.” 
Butleri : ““ Colombo, East Matale ’ (F. M. Mackwood). 
