381 
taken, and which is the only one I have seen, would appear to be 
immature; but when the tail-feathers are closely examined, they 
will be found to comprise both old and new feathers of precisely the 
same character, proving that such cannot be the case. In the size 
of its body this new Hornbill does not exceed the common Black- 
bird (Merula vulgaris) ; it must therefore be regarded as one of 
the smallest members of its group. 
I have named this bird hartlaudi, in honour of my friend Dr. 
Hartlaub of Bremen, a gentleman who has paid great attention to 
general ornithology, but especially to that of Western Africa, where 
this bird is believed to have been procured, but from what precise 
locality is unknown. 
6. Descriprion or a New Species or THE Genus Mono, or 
Lesson. By Joun Goutp, F.R.S., etc. 
Mono aricatts, Gould. 
Opposite page 357 of Dixon’s ‘ Voyage round the World,’ pub- 
lished as long back as 1798, will be found the figure of a bird under 
the name of the “ Yellow Tufted Bee-eater,”’ which appears never 
to haye received a specific appellation : this has probably arisen from 
the circumstance of no examples having yet found their way into 
our museums. The description given by Captain Dixon, copied 
from Latham’s ‘ Synopsis,’ doubtless has reference to the bird which 
my late friend M. Temminck called Moho fasciculatus. 
Two examples of this curious bird, male and female, which will 
hereafter be deposited in the National Collection, having lately come 
into my possession, I avail myself of the opportunity of characterizing 
the species, and have assigned to it the name of apicalis, from the 
circumstance of all but the two middle tail-feathers being tipped 
with white; in which respect Capt. Dixon remarked that the bird 
he had figured differed from Latham’s description of the Yellow- 
tufted Bee-eater. 
Dixon’s bird was obtained at Owhyhee, and I believe that my two 
specimens were brought from the same island. 
This bird may be described as having the general plumage sooty- 
black ; tail brown, all but the two middle feathers largely tipped 
with white ; the two central feathers somewhat narrower than the 
others, and gradually diminishing in the apical third of their length 
into fine hair-like or filamentous upturned points ; axille or under 
surface of the shoulder white; flanks and under tail-coverts bright 
yellow ; bill and legs black. 
Total length, 12 inches; bill, 12; wing, 43; tail, 63; tarsi, oe 
The plumage of the female is in every respect similar to that of 
the male ; but, as in the Honeyeaters of Australia generally, particu- 
larly amongst the members of the genus Ptilotis, the body is fully a 
fourth less in size. 
