CEYLON BUTTERFLIES. 133 
My own opinion is that we have three species in Ceylon, 
which, making use of both Green’s and Bingham’s tables, I 
would define as follows :— 
Three spots in basal half of cell; terminal margin of fore 
wing distinctly crenulate ; lower extremity of black border 
of fore wing usually subtended by yellow = silhetana. 
Not more than two spots in cell; if only one, it is usually 
rather indistinct ; terminal margin of fore wing entire ; lower 
extremity of black border of fore wing never subtended by 
yellow = hecabe. 
One very distinct black streak in cell ; terminal margin of 
wing entire, or very slightly crenulate ; lower extremity of 
black border of fore wing distinctly subtended by yellow = 
rotundalis. 
156. TeRIAS HECABE.—F ound in India, Malaya, China, &c. 
Moore also gives hecabeoides and simulata, but these are 
now regarded as varieties only. Itis very variable in markings 
and in size, and a dwarf form from 25 to 30 mm. in expanse is 
very common at Haldummulla. 
While in the Northern Province in November, 1915, and 
January, 1916 (wet season), I noticed that a large number of 
specimens showed exceptionally few markings on the under 
side. I caught many with both spots in the cell wanting, 
others with only one spot, and even a specimen with two spots 
on one wing and none on the other. More than half of those 
I caught were abnormal. I have subsequently found similar 
varieties plentiful at Haldummulla, Kottawa, &c. On the 
upper side the markings are normal, but the colour of the 
females is rather paler than usual, the under side of the hind 
wing being, as a rule, very pale. ‘There are two specimens in 
the Colombo Museum labelled 7’. sari, which are, I believe, 
only this variety of hecabe. They are very unlike Indian 
specimens of sarv. 
It is one of the commonest butterflies everywhere in the 
Island, and both wet and dry season forms fly together all 
the year round. 
157. TRIAS SILHETANA.—Moore gives citrina, uniformis, 
and templetonii. From the illustrations the two former are 
8 6(S8)19 
