114 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Heliopaedica xantusi Goutp, Mon. Troch., II. 1861, pl. 65 (descr.); Intr. Troch., 
1861, 61. Exuior, Illustr. New and Unfig. N. Amer. Birds, I. 1869, pl. 22. 
Bairp, Brewer, and Ripgway, Hist. N. Amer. Birds, II. 1874, 467, pl. 47, 
fig. 3 (descr. male and female; Cape St. Lucas). Muusanr and Verrraux, 
Hist. Nat. Ois.-Mouches, II. 1876, 3 (descr.). JASPER, Birds N. Amer., 1878, 
156, pl. 105, fig. 7 (Cape St. Lucas). 
Bfasilinna] xantusi Herne, Jour. Orn., 1868, 196 (crit.). Cours, Key N. Amer. 
Birds, 4th ed., 1894, 460, 461 (descr.; Cape St. Lucas.) RipGway, Man. 
N. Amer. Birds, 2d ed., 1896, 318 (descr. ; s. portion of Lower Calif.). 
[ Hylocharis| xantusi Mutsanr and VERREAUX, Class. Troch., 1866, 38 (characters 
of the genus). S#Harpe, Hand-list, IJ. 1900, 110. 
Hylocharis zantusii Gray, Hand-list, I. 1869, 151, no. 1,950. 
Heliopaedica xantusii Coorer, Orn. Cal., 1870, 3865 (descr.; Cape St. Lucas). 
Cougs, Check List, 1878, 55, no. 273. 
[Heliopaedica] xantusii Cours, Key N. Amer. Birds, 1872, 184 (descr.; Cape St. 
Lucas). 
Heliopaedica sxanthusi Mutsant, Ann. Soc. Linn. Lyon, nouv. sér., XXII. 1876, 
207 (Mexique). Mutsant and Vrerreaux, Hist. Nat. Ois.-Mouches, IV. 
1877, 186 (synonymy). 
Coeligena xanthusi MutsanT and VerRREAUX, Loc. cit., I. 1877, 190-192, pl. — 
(deser.; near Cape St. Lucas). 
Basilinna xanthusi Evuiot, Class. and Syn. Trochilidae, 1879, 227 (descr.; Cape 
St. Lucas). Evuprs-Drestonecuampes, Ann. Mus. Hist. Nat. Caen, I. 1881, 
479-481 (deser.). Boucarp, The Humming Bird, IV. 1894, 178, 179 (deser. ; 
Cape St. Lucas). 
Basilinna xantusi Ripeway, Proc. U.S. Nat. Mus., III. 1880, 6, 319 (Cape St. Lucas) ; 
V. 1888, 542, 543 (descr. Belding’s nests and eggs from San José, April 23, and 
arroyo, n.of Santiago Peak, May 9); VI. 1883, 158, footnote (crit.; S. Lower 
Calif.) ; Nom. N. Amer. Birds (Bull. U. S. Nat. Mus., no. 21), 1881, 338, 65, 
75, no. 347; Rep. U.S. Nat. Mus., 1889-1890, 1891, 869-371, pl. 44 (Cape 
district of Lower Calif.; descr. male, female, nest, and eggs; figures male 
and female from Pierce’s Ranch, and nest from San José). Cours, Check 
List, 2d ed., 1882, 73, no. 407. Brxpine, Proc. U.S. Nat. Mus., V. 1883, 
542 (mountain cafons of Cape Region; Cacachiles Mt.; San José; descr. 
nest from San José, April 28); VI. 1883, 349 (Victoria Mts.). <A. O. U, 
Check List, 1886, 227, no. 440. Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 
1889, 289, 290 (Cape Region; Comondu, etc.); Zoe, II. 1891, 191 (San José 
del Cabo). Satvin, Cat. Birds Brit. Mus., XVI. 1892, 255 (deser.; Agua 
Escondida; mountains s. of La Paz; Triunfo; San José del Cabo). ALLEN, 
Auk, X. 1898, 142 (tropical type). Brnprre, Life Hist. N. Amer. Birds, pt. 
If. 1895, 226, 227 (Cacachiles Mts.; San José; near Santiago Peak, etc. ; 
descr. Belding’s nests and eggs). 
Xantus’s hummingbird Bryanv Loc. cit., 198 (Victoria Mts.). 
[ Basilinna] xanthusi Dupots, Synop. Avium, fase. II. 1900, 189 (Basse-Californie). 
Seasonal variations: — Males. The series collected by Mr. Frazar includes 
specimens taken every month of the yéar excepting October and January. The 
summer and autumn birds are by far the brightest colored, having the green 
of the back quite pure; the black of the forehead, sides of head and chin, 
~~ 
