366 BIRDS OCCURRING IN INDIA NOT DESCRIBED 



This pale representative of C. apus, L., comes to Pekin in 

 large numbers in April {David) to breed, and leaves early in 

 August. A bird from the Himalayas, brought home by 

 Dr. Jerdon, agrees with my specimens ; and it is probably this 

 species, and not the true C. apus, which is found in India iu 

 winter.— Swinhoe, P. Z. S., 1871, 345. 



141 bis.— Hydrocissa convexa, Tem. 



In plumage, like H. albirostris, but with the four lateral 

 pairs of tail-feathers wholly white; in adults and in the young, 

 these are black at base, and the middle pair tipped with white. 



Iris vandyke-brown ; naked space round the eyes and sides 

 of throat bluish-white. — Moore and Horsfield. 



The little casque is wider than it is high, convex on the sides, 

 arched above, but with a very perceptible ridge along the median 

 line ; it ends in a perpendicular line, and is there compressed 

 into a knife-like edge ; it is whitish posteriorly, and marked 

 with a black band which follows its outline ; the point is black ; 

 the beak is the same colour as the casque, but the base of the 

 lower mandible, the commissure, and the point of the upper 

 mandible are black ; the spaces about the eye and at base of the 

 lower mandible are bare, but they are divided by a narrow band 

 of black feathers. 



The general plumage is black ; the abdomen, sides, flanks, 

 vent-feathers and lower tail-coverts pure white ; the two central 

 tail-feathers entirely black ; the rest, together with the termiual 

 portions of most of the quills, pure white.-— Temminck, P. C. 



(corrected.) 



145 bis.— Tockus gingalensis, Shaw, 



" Its general shape resembles that of most other species 5 ' 

 (of Hornbills), "but the bill, which is very large, is not distin- 

 guished by any crest or prominence ; the colour of the upper 

 part of the head and the back is blackish-brown, with a cast 

 of bluish-grey ; the wings are of a fine bluish-grey ; the 

 smaller coverts edged with black, marking out that part of 

 the plumage into so many scale-like divisions ; the face, fore- 

 part of the neck, breast, belly, and thighs are of a greyish 

 white, growing deeper on the belly and thighs ; the tail is 

 longishj the two middle feathers bluish-grey, the rest tipped 



