530 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXII. 



damp places in nalla loeds and on roads in the hot months of the 

 year in large numbers and is equally abundant in the shady ex- 

 tensive forests of the hills and in the open hot plains. The larva feeds 

 upon Leguminosece : Cassia, Wagatea, Acacia, Seshania, Coisal^nnia, 

 Albizzia, &c. From the variety of the foodplants existing there is 

 little wonder that the range is extensive and that the butterflies 

 vary as they do in colour, markings and size. The distribution is ; 

 throughout British India, eastwards to Siam and China ; south far 

 into the Malayan Subregion ; to the west into parts of the 

 Ethiopian Eegion. 



115. Terias sylhetana. — The type specimen was of the dry-season brood 

 and can be described briefly as follows : — Male, upperside : rich citron- 

 yellow. Fore wing : markings very similar to those in T. Jiecahe, variety 

 patruelis, Moore. Hind wing : ground-colour uniform ; a very narrow, 

 black, terminal line. In the type this is continuous, in other specimens 

 broken and interrupted, and in some large specimens intermediate between 

 the dry and wet-season forms, variable in width but distinctly broader 

 than in the type. Underside: the ground-colour very slightly paler; 

 markings much as in the dry-season form of hecabe, but in the fore wing 

 there is always an additional minute, reddish-brown dot in the extreme 

 base of the cell and in all typical specimens the apical reddish-brown patch 

 is much larger and spreads diffusely outwards to the termen. 



Wet-season brood. — Male and female, upperside : citron-yellow. Fore wing : 

 markings very similar to those of T. hecabe, variety meryuiana, Moore, but 

 the black area broader, especially the dilated, posterior, tornal portion 

 which, though squarer, has its inner edge slightly sloped outwards as in 

 meryuiana. The width of the black area is, however, very variable as are 

 also the size and shape of the dilated, posterior portion that occupies the 

 tornal angle. Hind wing : a black band along the terminal margin, this 

 band variable in width and generally attenuated anteriorly and posteriorly. 

 Underside : ground-colour similar to those in wet-season specimens of 

 hecabe, but always with an additional reddish-brown spot or dot at the 

 extreme base of cell of fore wing. Antennee, head, thorax and abdomen 

 and, in the male, the sex-mark, as in hecabe. Expanse : 41-58mm. 



Terias sylhetana is a variable insect, nearly as variable as hecabe ; dry- 

 season specimens can be distinguished from the corresponding forms of 

 hecabe by the much larger, outwardly diffuse, reddish-brown, apical patch on 

 the underside of the fore wiilg ; but the only constant difference distin- 

 guishing the wet-season forms (also the d ry-season ones) is the presence of 

 the extra spot in the cell of sylhetana on the underside of the fore wing. 



Larva. — Very similar to that of T. hecabe, but is always found in com- 

 panies of many individuals. Head round from front view, flattened some- 

 what on face, with a slight, depressed, thin line down centre ; surface 

 covered with minute, black tubercles bearing each a rather long, white 

 seta ; colour black ; clypeus very light yellow with similarly coloured jaws. 

 Segment 2 somewhat broader than head ; anal end longly semicircular, 

 somewhat square at extremity, dorsally slightly sloped. Surface of body 

 transversely lined as in hecabe, each interspace between the lines with a 

 row of small, black, longly conical tubercles which are more pronounced 

 laterally as a rule ; many of the dorsal tubercles often have a transparent, 

 longly pear-shaped, blue top to them (the dried liquid-globule ?) ; the 

 main tubercles of each segment with a longer, black seta often surmounted 

 by a globular, blue drop of liquid ; abdomen with small, setiferous, black 

 tubercles. Spiracles large, roundly oval, light yellowish brown in colour. 



