190 
Bulletin of the British 
Dr. Sharpe exhibited, on behalf of Mr. It. J. Ussher, a 
specimen of the larger form of the Snow-Goose, Chen nivalis 
(Forst.), which had been shot near Belmullet in co. Mayo. 
It belonged to the collection of the well-known Irish 
naturalist, Mr. H. Blake Knox. 
Mr. Howard Saunders exhibited a specimen of a Sociable 
Plover ( Chcetusia grey aria), which had been sent to him 
for inspection by Mr. E. Williams, of Dublin. The bird 
in question had been shot near Navan in co. Meath on the 
1st of August, 1899, and constituted the second occurrence of 
the species within the area of the British Islands. 
Mr. Ernst Hartert exhibited a new species of Humming¬ 
bird, which he described as follows :— 
Agyrtria tenebrosa, sp. n. 
Upper surface green; hind-neck and upper back with a 
steel-blue gloss; crown of head violet-blue, greenish on the 
forehead ; longer upper tail-coverts greenish bronze. Bec- 
trices deep steel-blue, almost black, the middle pair with a 
faint bronzy gloss. Under surface of body glittering green, 
the feathers of the chin and throat white before the metallic- 
green tips, those of the abdomen blackish before the green 
tips. Under tail-coverts dark bronzy-green. Feathers on 
the tibia and metatarsus as well as tufts of fluffly feathers on 
the sides of the belly dusky with whitish tips. Bill black, 
the lower mandible flesh-colour (in skin), with the apical 
third black. Wing 57-58, tail 38, central rectrices 31, 
bill 21 mm. 
Two specimens found in Bogota collections : the type 
in Mr. Rothschild's Museum ; another in Mr. Dunstall's 
collection. 
Ohs . In general coloration this species is very much like 
Saucerottia cyanifrons (Bourc.), but its elongated and 
slightly-curved bill, somewhat longer and narrower rectrices, 
and other characters seem to place it in the genus Agyrtria 
as at present accepted. 
