1887.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 577 



whitish. Chiu, throat, and upper chest wliite, faintly tinged with yel- 

 lowish, the leathers grayish basally ; lower chest and median line of 

 breast pale grayish, the color becoming very much deeper on sides of 

 breast; sides audflauks pale grayish olive, fading gradually into very 

 pale sulphur-yellow or yellowish white on belly and under tail-coverts, 

 the longer feathers of the latter with most of the (concealed portion 

 grayish. Upper inaudible black, lower light yellowish, becoming dusky 

 brownish at extreme tip; legs and feet black. Length (skin) 5.G0; wing 

 3.35, tail 2.05, exposed culmen .52, bill from nostril .10, width of upper 

 mandible at frontal apices .32. tarsus .52. 



Another adult male (No.lll271, same locality and collector, March 

 2G, 1887) is exactly similar in coloration, its measurements being as 

 follows, in the order given above: 5.85, 3.35, 2.70, .52, .40, .30, .52. 



I am very loath to describe another uew form of this extremely diffi- 

 cult genus, but I see no alternative, the bird being clearly separable 

 from G. virens, its nearest ally. 



18. Coccyzus minor (Gmel.). 

 Two specimens, February 18. 



19. Coccyzus americanus (Linn.). 

 One specimen, April 14. 



20. Falco peregrinus anatuin (Bp.). 

 One specimen, February 17. 



21. Falco columbarius Linn. 

 One specimen, April 14. 



22. Columba leucocephala Linn. 

 Four specimens, February 3 to 12. 



23. Butorides saturatus, si^. uov. 



SuBSP. CHAR. — Similar to B, virescens (Linn.), but much darker. 



Habitat. — Swan Island, Caribbean Sea. 



Adult (type, No. 111281, Swan Island, Caribbean Sea, March 6, 1887; 

 Charles H. Townsend) : Pileum dark greenish bronze, the longer feathers 

 of crest brighter bronzy green ; sides of head and whole neck, except 

 median line in front, plain dark purplish chestnut, the neck strongly 

 tinged with lilac-grayish or purplish glaucous ; a line of deep buff along 

 upper edge of malar region ; median line of chiu and throat buff, that 

 of lower throat indistinctly spotted with dusky, and median line of fore- 

 neck with much buff beneath the surface, but this mostly concealed. 

 Lanceolate plumes of black and scapulars rich greenish bronze, strongly 

 tinged, in certain lights, with glaucous-gray, their shafts pale ash-gray; 

 wing-coverts bright metallic bronze-green, narrowly but distinctly mar- 

 gined with dull ochraceous-buff or clay-color (lighter buff on greater 

 coverts), the lesser coverts less sharply margined with dull rusty ; remi- 

 ges plain slate-color, tinged with glaucous, the primaries very faintly' 

 and the secondaries distinctly glossed with bottle-green ; primary-coverts 

 Proc. N. M. 87 37 



