BIRDS OF NORTH AND MIDDLE AMERICA. 561 
[Chlorostilbon] caribeus SHarre, Hand-list, ii, 1900, 113 (w. Venezuela; Trinidad; 
Aruba, Curacao, Bonaire, and Margarita islands). 
Chlorostilbon caribbxa Roxsinson, Proc. U.S. Nat. Mus., xviii, 1896, 672 (Margarita 
I.), 682 (Guanta, Venezuela), 684 (La Guayra, Venezuela).—Rosinson and 
* Ricumonp, Proc. U. 8. Nat. Mus., xxiv, 1901, 173 (coast of Venezuela).— 
Cuarx (A. H.), Auk, xix, 1902, 263 (Margarita I.). 
Chlorostilbon caribbeus Simon and Damas, Ornis, xi, 1901, 212 (Curacao). 
Chlorostilbon caribbezus Lowe, Ibis, 1907, 559 (Margarita I.). 
[Chlorostilbon] caribeus Simon, Cat. Troch., 1897, 18. 
(?) Chlorostilbon caribbeus lessoni Srmon and Datmas, Ornis, xi, 1901, 212, 213 
(Cartipano, Cariaco, Andes de Cumané, and Ciudad Bolivar, Venezuela). 
[Chrysomiras atala] var. caribaeus Muusant, Ann. Soc. Linn. Lyon, n. 8., xxii, 
1876, 210. 
(?) Chiorostilbon caribaeus nanus BreRLerscH and Harrtert, Novit. Zool., ix, 
April, 1902, 86 (Caicar4, Venezuela; coll. Tring Mus.). 
Genus HELIOTHRYX Boie. 
Hetiothryx Bots, Isis, 1881, 547. (Type, Trochilus auritus Linnzeus.) 
Heliothrys (emendation) Gray, List Gen. Birds, 1840, 14. 
Heliothrix (emendation) Srrickyanp, Ann. Nat. Hist., vi, 1841, 419.—CaBanis 
and Herne, Mus. Hein., iii, March, 1860, 28. 
Heliotriz (emendation) Bonaparte, Consp. Av., i, 1850, 69. 
Rather large Trochilide (length about 100-120 mm.) with the 
straight bill excessively compressed (finely wedge-shaped) anteriorly, 
tail more or less graduated (but rectrices broadly rounded terminally), 
under parts white, and with a black stripe on side of head. 
Bill (unfeathered portion) about as long as head, straight, rather 
broad and depressed basally, excessively compressed terminally, 
narrowly cuneate with finely acuminate tip, in vertical profile; cul- 
men distinctly ridged throughout (but less sharply so posteriorly); 
tomia smooth; mandible with a longitudinal, median narrow groove 
on basal half only. Nasal operculum very narrow, completely hidden 
by the dense, closely appressed frontal feathering, which extends to 
or beyond anterior end of the nostrils, forming a short obtuse point 
or antia on each side of culmen or these merged into a single, broader, 
median antia. Feet excessively small; tarsus feathered on upper 
portion, except on inner side; lateral toes about equal in length, 
slightly shorter than middle toe; hallux much shorter than lateral 
toes. Wing about four times as long as exposed culmen, the outer- 
most primary longest. Tail about three-fifths as long as wing in adult 
males to five-sixths as long in adult females, graduated, the rectrices 
rather soft, with broadly rounded tip. 
Coloration.—Metallic grass-green or bronze-green above, the middle 
rectrices bluish black, lateral rectrices and under parts pure white 
(faintly spotted with grayish on chest in young); a black loral, sub- 
orbital and auricular stripe. Adult males with a stripe of brilliant 
metallic emerald green beneath the black stripe on side of head, a 
violet post-auricular tuft, sometimes with the pileum metallic violet. 
Range.—Guatemala to Guiana and Peru. (Three species.) 
81255°—Bull. 50—11—36 
