HIRUNDO. 303 
Smith-|Collec-| Sex When 
sonian| tor’s | and Locality. Gollected Received from Collected by 
No, No. | Age. ; 
35,056 of 66 Brazil. mae Acad. Nat.Sciences.; ...... 
* 342 se Bahia. ae Cabs laiwnencen so) ||aueves i. 
CALLICHELIDON, Bryant. 
Callichelidon, Bryant, MSS. (Type H. cyaneoviridis, BRYANT.) 
Nostrils lateral; overhung by membrane. Tarsilengthened ; equal to middle 
toe and more than half the claw; entirely bare of feathers. Basal joint of 
middle toe entirely adherent externally, for more than half internally. Lateral 
toes equal, or outer a little the longer. Tail deeply forked ; the feathers some- 
what attenuated; as long as the wings. 
Above green, beneath white. 
The type of this new subgenus, perhaps entitled to rank as a full 
genus, has the same soft velvety condition of the dorsal plumage, 
without metallic lustre, as in thalassina. The tail is deeply forked 
and the lateral feathers narrow and tapering from the base. The 
second species, placed here provisionally on account of the long - 
bare tarsi, exhibits on the back a strong metallic lustre, and the tail 
is less deeply forked. : 
The legs are longer and more naked than in other American 
Swallows—in this respect approaching Cheramaca, of Cab. (C. leu- 
costerna, of Australia). Here, however, the outer toe is said to be 
shorter than inner; the claws very large, the outer toe but little 
adherent at base. 
Synopsis of Species. 
Above soft velvety grass green, changing to blue on rump. 
Beneath pure white. Feathers of chin and throat white 
to base . c : : . . , ; 5 - cyaneoviridis. 
Above metallic golden-green. Beneath white ; the chin dusky. 
Feathers of chin and throat plumbeous at base ; of breast 
with large greenish spots, somewhat concealed C . euchrysea. 
Hirundo cyaneoviridis. 
Hirundo cyaneoviridis, Bryant, Pr. Bost. N. H. Soc. VII, 1859, 111 
(Nassau, N. P., Bahamas; very abundant).—Callichelidon cyanco- 
viridis, Bryant, MSS. 
Hab. Island of New Providence, Bahamas. 
(No. 11,946.) Upper parts soft velvety green, with a slight occasional 
gleam of golden, passing on the wings into greenish-blue, and on the rump 
