270 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XIX. 



No, XXVIII.— ON TERACOLUS (COLOTIS) FAUSTA AND 

 OTHER SPECIES OF THE GENUS. 

 I am sending some specimens of Teracolus {Colotls) fausia taken in the 

 ueighbourhood of Karachi this year and would like to draw attention to a 

 difference between the two sexes which is not mentioned in Col. Bingham's 

 description in the Fauna of British India, Butterflies (vol. ii., p. 267). According 

 to the latter the male may be distinguished from the female by 



1. The absence of the sex-mark (specialized scales) in the fore wing. 



2. In some forms a lighter colouring throughout. 



In addition to these distinctions, however, I have noticed in the specimens 

 obtained this year that 



In the male the dorsal margin of the fore wing shows a pronounced curve, 



so much so that interspace forms a kind of lapet over the hind wing ; 

 In thefemale there is no such curve, the dorsal margin being straight. 



1 have found this difference to be very constant among all specimens 

 procured. 



I also send a few specimens of T, e.trida and T. danae, including some taken 



in 1904, which was an ordinary dry season in Sind, and some taken 



this year, which brought exceptionally good rainfall. The difference in 



colouring between the specimens of the two seasons is very pronounced. 



In his description of T. danae, Col. Bingham remarks *" Male and female 



colouration very variable, especially in the female." I have sent you three 



specimens of females illustrating this, to which I would add that among a large 



series I find hardly two alike. In some of them the dusky margin is diffused 



over the whole of the apex of the fore wing and the crimson patch reduced 



to a few whitish streaks. 



K. BERNHARDT. 

 Karachi, dOth October 1908, 



No. XXIX.- DESCRIPTION OF A NEW SPECIES OF CHA RAXES 

 FROM THE BHUTAN FRONTIER. 

 By G. W. V. DE Rhe-Philipe. 

 Charaxes raidhaha, sp. nov. 



Closely allied to C. fahius, Fabricius. Termen of fore wing more oblique 

 and both termen and dorsum shorter than in C. fahiua, giving the wing a 

 narrower and more pointed appearance. 



Upper side. — Fore wing ground colour a deep velvety black, darker generally 

 than in the allied form ; basal area greyish black. Immaculate except for a 

 subterminal series of cream-coloured spots decreasing in size towards the apex ; 

 these spots larger and more marked than in C. fahms, those at the posterior 

 angle being twice as large as in most examples of the latter. Hind wing, discal 

 band as in C. fabius, but generally paler and narrower ; subterminal series 

 of light yellow spots complete, terminal markings greenish blue, not yellow. 



Under side. — Ground colour a purplish grey, appreciably different from the 

 usual ground colour of C. /alius. Markings arranged as in the latter, but the 



