BIRDS OF NORTH AND MIDDLE AMERICA. 595 
Altthis] elliott Rripeway, Rep. U. 8. Nat. Mus., 1890, 380 (mon.).—Hanrrtert, Das 
Tierreich, Troch., 1900, 211 (mon.). 
[Atthis] elliott SHarrr, Hand-list, ii, 1900, 142. 
T[rochilus] elliott Ripaway, Man. N. Am. Birds, 1887, 315. 
ATTHIS HELOISA MORCOMI (Ridgway). 
MORCOM’S HUMMING BIRD. 
Similar to A. h. heloisa, but smaller (except bill); adult female 
paler below, with bronzy spots on chin and throat much smaller, 
sides less extensively cinnamon-rufous, and under tail-coverts pure 
white. (Adult male not seen.) 
Adult female.—Length (skin), 66; wing, 36; tail, 19.5; exposed 
culmen, 12.5.% 
Southern Arizona (Ramsey Cafion, Huachuca Mountains). 
Atthis morcomi Ripeway, Auk, xv, Oct., 1898, 325 (Huachuca Mts., Arizona; 
coll. U. 8. Nat. Mus.).—AmeErican OrnitHoLogists’ Union, Auk, xvi, 1899, 
111; Check List, 3d ed., 1910, 204.—Battey (Florence M.), Handb. Birds 
W. U.S., 1902, 241—Swanrts, Pacific Coast Avif. no. 4, 1904, 19 (Ramsey 
Cafion, Huachuca Mts.). 
A[tthis] morcomi Hartert, Das Tierreich, Troch., 1900, 211 (monogr.). 
[Atthis] morcomi SHarrz, 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) RercHenBacs, Troch. Enum., 1855, 11. 
Selasforus (error) Ducks, La Naturaleza, i, 1870, 141. 
Selatophorus (emendation) Newton, Dict. Birds, pt. ii, 1893, 448, in text. 
Small Trochilide (length about 65-85 mm.), related to Archilochus 
and Calypte, 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 
Calypte 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, which 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) slightly longer than hallux. 
Wing about three times as long as exposed-culmen, the outermost 
@ One specimen (the type). 
