BIRDS OF NORTH AND MIDDLE AMERICA. 99 



Bill short, broad, and thick, its width at frontal antiae equaling or 

 exceedino- length of exposed ciilmen, the latter much less than distance 

 from nostril to eye; depth of bill at nostrils much more than half its 

 width at same point; tip of maxilla very slightly uncinate, the tomium 

 straight, with subterminal notch small but distinct; nostril small, 

 longitudinally ovate, only the edge of the overhanging operculum 

 showing beneath the feathering of the frontal antiae. Rictal bristles 

 distinct. Tail more than half as long as wing, forked for more than 

 one-third its length, the lateral rectrices rather narrow and distinctly 

 contracted terminally, their tip obtusely pointed. Tarsus longer than 

 middle toe (without claw), the inner and posterior })ortions entirel}' 

 naked, the extreme upper portion feathered for a short distance in 

 front; basal phalanx of middle toe united to that of outer toe bj'' about 

 half its length or a little more, to the inner toe by nearh' as much: 

 claws of latei'al toes reaching nearly to base of middle claw. 



Coloration. — Above soft (not glossy) green, becoming blue or \iol(^t 

 on rump and upper tail-coverts, the plumage structurally similar to 

 that of Tdclujci neta ; no white tuft on sides of rump; under parts 

 entirely white. 



Nidification. — (Unknown.) 



i?«^^6'.— Bahama Islands. (Monotypic.) 



CALLICHELIDON CYANEOVIRIDIS (Bryant). 

 BAHAMA SWALLOW. 



Adult 7nale. — Pileum, hindneck, back, and scapulars, plain soft 

 (not glossy) metallic dull bottle green, changing to soft metallic ))luish 

 m3'rtle green or greenish blue on lesser wing-coverts, rump, and 

 upper tail-coverts; middle and greater wing-coverts and tertials dusky 

 greenish blue, broadly margined with lighter and brighter greenish 

 blue or bluish green; alula, primary coverts, primaries, secondaries, 

 and rectrices dark greenish blue narrowh^ edged with lighter greenish 

 blue or bluish green, the lateral rectrices very narrowly edged with 

 whitish, their inner webs more broadly but less sharply edged with 

 the same; lores dusky; auricular, suborbital and malar regions, axil- 

 lars, under wing-coverts and entire under parts pure white; bill black; 

 iris brown; legs and feet brownish black or blackish brown ; length 

 (skins), 130-150 (145.0); wing, 113-117 (115); tail, 06-73 (67.10. forked 

 for 25-31 (27.1); exposed culmen, 6-7 (6.4); tarsus, 11.5-12 (11.8); 

 middle toe, 10-11 (10.S).« 



Adidt femalt. — Similar to the male, but more or less duller in color, 

 with white of auricular region (sometimes that on sides of breast — 

 more rarely that on center of chest) mottled with grayish brown; 

 length (skins), 130-140 (135); wing, 105-109 (107.5); tail, 50-61 (50.5), 



«Seven specimens. 



