106 BUCEROTID. 
Ocyceros birostris, Scop. 
144.—Meniceros bicornis, Scop.—Jerdon’s Birds of India, Vol. I, 
p. 248 ; Butler, Guzerat ; Stray Feathers, Vol. IIT, p. 457; Dec- 
can, Stray Feathers, Vol. IX, p. 384; Lophoceros birostris, Scop. 
Swinhoe and Barnes, Central India ; Ibis, 1885, p. 62. 
THE CommMon GREY HORNBILL. 
Length, 22 to 25 ; expanse, 25 to 32; wing, 75 to 8-7; tail, 10 
to 12; tarsus, 1°7 ; bill from gape, 3°5 to 425. 
Bill and casque dusky ; the tips and ridges of both mandibles 
whitish ; casque low and compressed, the ridge prolonged anteri- 
orly to a very acute angle, and the hind part concealed by the 
feathers of the forehead (which bend down oyer it) and not 
extending backward over the crown. 
In the female the casque is lower, more depressed and the sharp 
pointed horn is wanting; irides red-brown ; feet dark plumbeous. 
Plumage grey, paler below, and from the breast gradually albes- 
cent ; ear-coverts darker cinereous, and a light streak over the 
eye and ear-coverts ; primaries and secondaries dusky black, the 
latter margined with grey, all except the two first tipped white, 
with a brownish-white streak on the outer web; tail black near 
the end, tipped white. 
In the female and in immature bird the first six or seven pri- 
maries want the white tips entirely, while on all but the first two, 
the whitish streaks are much more developed and conspicuous 
than in the adult male. 
The Common Grey Hornbill does not occur in Sind, and has 
only been doubtfully recorded from the Deccan ; it is not uncom- 
mon at Mount Aboo and forests at foot, and is very common at 
and near Mhow and Neemuch ;—indeed, generally speaking, it is 
not uncommon in all the well-wooded portions of Rajpootana, 
Guzerat, and Central India. 
Genus, Tockus, Lesson. 
Bill without a casque, but with the ridge somewhat elevated 
and much curved ; size small ; plumage grey. 
Tockus griseus, Lath. 
145.—Tockus gingalensis, Shaw.—Jerdon’s Birds of India, Vol. I, 
p- 250 ; Butler, Deccan ; Stray Feathers, Vol. 1X, p. 384, 
THE JUNGLE GREY HORNBILL. 
Length, 22 ; expanse, 25 to 27; wing, 825; tail, 85 to 95; 
tarsus, 1°6; bill from gape, 4°25. 
Bill horny-yellow, suffused with a brownish-red tinge, except 
towards the tips; margin along commissure black; tips paier ; 
orbital skin black ; irides red ; tarsi and feet greenish. 
Head above, and back, dark cinereous-brown, with a cast of 
bluish grey; the greater coverts, secondaries, and primaries, all 
narrowly edged with whitish, and the latter broadly tipped with 
