‘ 
446 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
[Amazilia] cyanura Scrater and Satvin, Nom. Av. Neotr., 1873, 92, part (Nica- 
ragua). 
A[mazilia] cyanura Ripeway, Man. N. Am. Birds, 1887, 318, part (Nicaragua); 
Rep. U. S. Nat. Mus. for 1890 (1891), 363, part (Nicaragua; diagnosis, etc.). 
Amizilis cyanura OBERHOLSER, Proc. Ac. Nat. Sci. Phila., June 2, 1899, 207. 
H[emithylaca] cyanura CaBanis and Herne, Mus. Hein., iii, 1860, 38, footnote 
(Realejo). 
Pyrrhophena cyanura Goud, Introd. Troch., oct. ed., 1861, 160.—Munsant and 
VERREAUX, Hist. Nat. Ois.-Mouch., i, livr. 4, 1874, 307 (Realejo). 
[Pyrrhophaena] cyanura Muisant, Ann. Soc. Linn. Lyon, n. 8., xxii, 1876, 206. 
Efratina] cyanura Heine, Journ. fiir Orn., 1863, 191. 
Ariana cyanura Mutsant and VERREAUX, Classif. Troch., 1866, 36. 
[Polytmus] cyanurus Gray, Hand-list, i, 1869, 132, no. 1684. 
Saucerottia cyanura EupES-DEsLonecuampes, Ann. Mus. Caen, i, 1880, 417. 
S[aucerottea] cyanura Hartert, Das Tierreich, Troch., 1900, 52, part (Nicaragua). 
[Saucerotiea] cyanura Stmon, Cat. Troch., 1897, 13.—SuHarre, Hand-list, ii, 1900, 
107. 
Amizilis cyanura OBERHOLSER, Proc. Ac. Nat. Sci. Phila., June 2, 1899, 207. 
Saucerottea cyanura impatiens @ Banas, Proc. Biol. Soc. Wash., xix, July 30, 
1906, 104 (San Pedro de Mojén, Costa Rica; coll. E. A. and O. Bangs). 
Saucerottia _cyanura impatiens CarRikER, Ann. Carnegie Mus., vi, 1910, 526 
(Costa Rica; crit.). 
SAUCEROTTIA CYANURA GUATEMALZ Dearborn. 
GUATEMALAN BLUE-TAILED HUMMING BIRD. 
Similar to S. c. cyanura, but much darker in color, especially the 
wings; primaries blue-black instead of violet-dusky; chestnut on 
basal portion of remiges darker and much more restricted; green of 
upper parts darker, and blue of tail more violaceous, especially on 
basal portion of outer webs of rectrices, where the color sometimes 
inclines to metallic purple, the under tail-coverts almost wholly blue- 
black or dark steel blue, or else margined with darker grayish or 
chestnut. 
Adult male-—Length (skins), 92-100 (97); wing, 53-56 (54.5); tail, 
30-31.5 (30.8); culmen, 18.5-19 (18.8).® 
Adult female.—Length (skins), 94-100 (97); wing, 50-52 (51); tail, 
30; culmen, 19.5-20 (19.7).° 
Pacific slopeof Guatemala (Mazatenango, Suchitepequez; Patuldl;¢ 
Retalhuleu; Pie de la Cuesta, San Marcos) and Chiapas (Huehuetan). 
Amazilia cyanura (not of Gould) Satvin, Ibis, 1863, 239 (Pacific coast, Guatemala), 
1866, 195 (Retalhuleu and Mazatenango, Guatemala); Cat. Birds Brit. Mus.; 
xvi, 1892, 212, 661, part (Retalhuleu and Pie de la Cuesta, Guatemala).— 
Ex1io7, Classif. and Synop., Troch., 1879, 223, part (Guatemala).—Satvin and 
Gopman, Biol. Centr.-Am., Aves, ii, 1892, 297, part (Retalhuleu and Maza- 
tenango, Guatemala)—Boucarp, Gen. Hum. Birds, 1895, 206, part (Guate- 
mala). 
@T am not able to distinguish the type of &. c. impatiens from Nicaraguan examples 
of true S. cyanura, except by the very slightly less violaceous blue of the tail, all the 
characters mentioned in the original description failing to hold good. 
+ Three specimens. 
¢ Two specimens. 
4See p. 448, footnote. 
