98 BIRDS OF TENASSERIM* 



whitish at tip. Sometimes the whole of both mandibles are 

 pale fleshy pink, bluish towards the tip. In one specimen part 

 of the skiu of the upper mandible had peeled off from some 

 natural cause, showing below a dull horny blue. 



The sexes do not differ, that I can discover, in plumage. 

 The entire chin, throat, and upper breast is a dull fulvous 

 or rusty white, some of the feathers often more or less 

 margined with ferruginous, or occasionally in the case of 

 some few feathers with dull crimson. A patch in the 

 middle of the back (not seen when the bird is at rest) 

 of varying size, and varying in color from a pale rosy 

 orange to orange crimson ; a broad white band at the base 

 of the first eight quills on both webs ; a white mark, some- 

 times a band across both webs, sometimes a spot on both webs, 

 sometimes on one web only, on from the five to the one exte- 

 rior pair of tail feathers. Most commonly, I think, the three 

 outer pairs have it; but it varies, as above, from a broad band 

 on all five to a small spot on the outer web of the external 

 feathers only, and this is instructive as indicating the weight 

 that should be given to similar differences in the white mark- 

 ings of the tail of Cymborhynchus macrorhynchus. The whole of 

 the rest of the plumage of the bird is dull black, but with, in fine 

 adults, a decided greenish tinge on rump and upper tail-coverts. 



The youngest bird that we have obtained, shot on the 1st 

 of May, soon after leaving the nest, was everywhere a dull 

 sooty black, wanted the red patch on the back, and had only 

 a yellowish patch in the middle of the throat. The white 

 on the primaries was as in the adult. 



140.— Diclioceroscavatus,*S7to. (21). S. F., IV., 384. 



{Tonghoo, very common, Rams.) Kollidoo ; Pahpoon ; Yea ; Pakchan ; Banka- 

 soon ; Malewoon. 



Occurs throughout Tenasserim, except in the more elevated 

 portions of the higher hills, but is especially abundant in the 

 evergreen forests of the south. 



* Mr. Elliot maintains, Ibis, 1877, p. 416, that the Linnsean name bicomis ought to 

 be retained for this species. I consider that it ought to be rejected altogether. 



The case stands thus : — 



Linnaeus himself described the plumage of affinis or albirostris, and a bead and 

 casque, most probably of cavatus. He gave references. 



Pet. Gas. 43, t. 28, /, 6 and t. 31, /. 1. 



To this work I have not access. 



Will. Orn. t. 17, /. 1. 



This Mr. Elliot says is the head of cavatus. 



Edw. Av. 2, p. 151, *. 281, /. D. 



This is unmistakeably the head of convexus. 



Briss. Av., p. 668. 



Here the head of cavatus and a plumage nearest approaching to that of convexus 

 are described. 



Now I submit that no name based on such heterogenous foundations can stand for 

 aDy species, ami I reject it altogether, 



