1899.] F. ¥mu— On a new species of Bhimraj. 119 



fathoms' station). The male differs from the female in the form of 

 the chelipeds, which in the male have a club-shaped palm. The bran- 

 chial formula is exactly the same as that of Latreillia pennifera : there 

 are 8 branchiae on either side, namely 3 pleurobrauchise (somites xi. 

 xii. and xiii.), 2 pairs of arthrobranchiae (appendages ix. and x.), and a 

 small podobranchia on the second maxillipeds. 



On a new species of Bhimraj (Dissemurus), with some observations on 

 the so-called family DicruridsD. — By F. Finn, B.A., F.Z.S., Deputy 

 Superintendent of the Indian Museum. 



(Plate II.) 

 [Eeceived July 28th ; Read August 2nd, 1899]. 



About three years ago I saw at the establishment of Mr. 

 W. Rutledge, of Entally, a living specimen of a Bhimraj or Racket- 

 tailed Drongo, which at once attracted my attention by its pied plum- 

 age, and I purchased it for the Museum. Unfortunately the bird did 

 not long survive, being in poor condition when received, and its skin 

 was transferred to the Museum collection. At the time I regarded it 

 merely as a curious variety, but, taking into consideration the extreme 

 rarity of symmetrical albinism (except in the case of albinoid or pallid 

 varieties), and the fact that the appearance of this specimen is not 

 suggestive of ordinary albinism, but rather of specific difference, I 

 venture to characterize it as new, and shall name it after Major 

 Alcock, I. M.S., Superintendent of the Indian Museum, in recognition 

 of the kind encouragement he has always extended to my ornitho- 

 logical studies. 



Dissemurus alcochi, sp. nov. (Plate II). 



Habit and size of an ordinary example of Dissemurus paradiseus 

 with a moderate crest ; colour also as in that species ; black glossed 

 with steel-blue, with the following exceptions : the upper and lower 

 wing-coverts except the primary-coverts, inner scapulars, axillaries, 

 upper tail-coverts and the lower plumage from the breast downwards, 

 which are white edged with black, and the rump and under tail-coverts, 

 which are entirely white. There are also some white streaks on the 

 lower breast, and a shading of white on the inner webs of the tail- 

 feathers and innermost secondaries, and on the outer webs of the outer 

 secondaries. The black edging of the white feathers is best developed 

 on the greater wing-coverts, where it extends right round the tip of the 

 feather. Soft parts as in D. paradiseus of the same age. Bill from 

 gape If inches ; wing 6; shank 1"1. 



