BIRDS OF NORTH AND MIDDLE AMERICA. 595 



A[tthis] ellioti Ridgway, Rep. U. S. Nat. Mup., 1890, 380 (mon.).— Hartert, Das 



Ticrreich, Troch., 1900, 211 (mon.). 

 [Atthis] ellioti Sharpe, Hand-list, ii, 1900, 142. 

 T[rochilm] ellioti Ridgway, Man. N. Am. Birds, 1887, 315. 



ATTHIS HELOISA MORCOMI (Ridgway). 



MORCOM'S HUMMING BIRD. 



vSimilar to A. li. luioisa, but smaller (except l)ill) ; adult female 

 paler below, with bronzy spots on chin and throat much smaller, 

 sides less extensively cinnamon-rufous, and under tail-coverts pin^e 

 white. (Adult male not seen.) 



Adult female. — Length (skin), 66; wing, 36; tail, 19.5; exposed 

 culmen, 12.5.'^ 



Southern Arizona (Ramsey Canon, Huachuca Mountains). 



Atthis morcomi Ridgway, Auk, xv, Oct., 1898, 325 (Huachuca Mts., Arizona; 

 coll. U. S. Nat. Mus.). — American Ornithologists' Union, Auk, xvi, 1899, 

 111; Check List, 3d ed., 1910, 204.— Bailey (Florence M.), Handb. Birds 

 W. U. S., 1902, 241.— SwARTH, Pacific Coast Avif. no. 4, 1904, 19 (Ramsey 

 Canon, Huachuca Mts.). 



A[tthis] morcomi Hartert, Das Tierreich, Troch., 1900, 211 (monogr.). 



[Atthis] morcomi Sharpe, Hand-list, ii, 1900, 142. 



Genus SELASPHORUS Swainson. 



Selasphorus Swainson, Fauna Bor.-Am., ii, 1831, 324, 496. (Type, Trochilus 



rufus Gmelin.) 

 Selosphorus (emendation) Bonaparte, Consp. Av., i, 1850, 82. 

 Selaspherus (emendation) Reichenbach, Troch. Enum., 1855, 11. 

 Selasforus (error) Duges, La Naturaleza, i, 1870, 141. 

 Selatophorus (emendation) Newton, Diet. Birds, pt. ii, 1893, 448, in text. 



Small TrochilidtTe (length about 65-85 mm.), related to Archiloclius 

 and Cahjpte, but differing from both in having the tail more or less 

 rounded or graduated in adult males, strongly rounded in adult 

 females and young; adult males also differing from those of Archilo- 

 chus in having the "gorget" elongated laterally, and from those of 

 CalyiJte in having the pileum concolor with the back; adult males of 

 most species with outermost primary attenuated and acute terminally. 



Bill about as long as head to decidedly longer, straight, slender, 

 terete; culmen rounded except basally, where contracted into a more 

 or less distinct ridge; tomia smooth; mandible with the usual lateral 

 median groove or sulcus. Nasal operculum rather broad and con- 

 vex, tumid posteriorly, nude, but hidden by appressed frontal feath- 

 ering, wliich anteriorly extends considerably beyond anterior edge of 

 nostrils, forming a short obtuse point or antia on each side of culmen. 

 Tarsus feathered, except on posterior side; lateral toe slightly 

 shorter than middle toe, but (apparently) slightl}' longer than hallux. 

 Wing about three times as long as exposed culmen, the outermost 



a One specimen (the type). 



