142 THE BUTTERFLIES OF CEYLON 
is thelarger. It has also occasionally a minute spot in inter- 
space 6. 
Mr. Hannyngton sent me a chromus ? 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 and a small dot in 7. The 
band en the hind wing is broader than that of alexts, but is 
not sharply defined like that of butlers. 
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 iust 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 cn 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 butleyi from Kandy 
and Deniyaya, and of chromus from Kandy, Jaffna and 
Mannar. 
231. BIBAsIs SENA. Also found in India and Siam. 
The colour of the cilia on the hind wing and the patch of 
long hairs on the dorsum, above the tornus, varies from rather 
pale orange to orange-vermilion in freshly caught specimens. 
The fore wing of the female is broader than that of the male, 
and the hind wing is more rounded. , 
I consider it a rarity. I have taken one or two specimens 
on this estate, and in December, 1904, I found several inside 
Wellawaya resthouse settled on the walls. They were very 
wary and difficult to catch, so I only got three or four ; the 
others did not return to the resthouse that day. With these 
exceptions, I have never come across it, but have received 
specimens from Kandy. 
The prehensores are figured on Plate 6, figs. 69 and 70. 
