464 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



dusky usually replacing purplish on basal portion of outer webs, or 

 with the purplish more restricted (on both webs), the tip (broadly on 

 outermost rectrix) abruptly grayish wliite; primaries dusky brownish 

 slate; median portion of chin and throat velvety black (this some- 

 times broken or irregular), the median portion of chest and breast 

 metallic bluish green, passing into dusky on median line of abdomen; 

 sides of chin and throat, malar region, and thence posteriorly to tliighs, 

 white; sides of neck, sides of chest, sides of breast, sides, and flanks 

 metallic greenish bronze, sometimes washed or intermixed with pur- 

 plish bronze; under tail-coverts grayish bronzy, tipped or terminally 

 margined with white; femoral and lumbar tufts white; bill, etc., as 

 m adult male; length (skins), 103-121 (114); wing, 62-69.(64.7); 

 tail, 32-38 (34.3); culmen, 25-31 (28.1).« 



Immature male and female. — Similar to the adult female, but chin 

 and upper throat white, and sides of chin and throat (sometimes sides 

 of chest and breast also) spotted or overlaid with chestnut (the 

 feathers white beneath surface). 



Southeastern Mexico in States of Tamaulipas (Tampico; Tantina; 

 Alta Aira), Vera Cruz (Cordova; Jalapa; Misantla; Choapam; 

 Catemaco; Tlalcotalpam; Coatzocoalcos; Antigua), Oaxaca (Santa 

 Efigenia; Tehuantepec), Chiapas (Palenque), and Yucatan (La Vega; 

 Chichen-Itza; Labna; between Ticul and Uxmal; Cozumel, Meco, 

 Mugeres, and Holbox islands), southward through British Honduras 

 (Belize; Half Moon Cay; Isabella; Manatee Lagoon) and Guatemala 

 (Santa Ana, Peten; Lake Peten; Escuintla; Hacienda de la Con- 

 cepcion) to Honduras (San Pedro; Bonaca Island). 



Trochilus prevostii Lesson, Hist. Nat. Colibr., 1830-31, 87, pi. 24 (locality 

 unknown); Index Gen. et Synop. Troch., 1832, p. xii (Surinam?). — ?BouR- 

 ciER, Rev. Zool., vi. 1843, 99 ("Caracas"). 



{?)T[rochilus] prevostii Bourcier and Mulsant, Ann. Soc. d'Agr. Lyon, vi, 1843, 

 39 ("Caracas"). 



P[olytvms] prevostii Gray, Gen. Birds, i, Dec, 1848, 108. 



[Polytmus] prevostii Gray, Hand-list, i, 1869, 125, no. 1577. 



[Lavipornis] prevosti Bonaparte, Consp. Av., i, 1850, 72; Rev. et Mag. de Zool., 

 1854, 250.— ScLATER and Salvin, Nom. Av. Neotr., 1873, 81, part.— Mul- 

 sant, Ann. Soc. Linn. Lyon, xxii, 1876, 203. — Sharpe, Hand-list, ii, 1900, 

 118, part. 



Lavipornis prevosti Gould, Mon. Troch., pt. xv, 1858, (vol. ii), pi. 75, part; 

 Introd. Troch., oct. ed., 1861, 65, part. — Sclater, Proc. Zool. Soc. Lond., 

 1856, 287 (Mexico); 1859, 367 (Jalapa, Vera Cruz), 385 (Choapdm, Vera 

 Cruz). — Sclater and Salvin, Ibis, 1859, 127 (Guatemala); Proc. Zool. Soc. 

 Lond., 1870, 837 (Atlantic coast Honduras). — Mulsant and Verreaux, 

 Classif. Troch., 1866, 24; Hist. Nat. Ois.-Mouch., i, livr. 3, 1874, 160 (Guate- 

 mala; Honduras; Mexico); iv, livr. 2, 1877, 156.— Salvin, Ibis, 1860, 272 

 (Escuintla, Guatemala); 1864, 380 (Half Moon Cay, Brit. Honduras); 1889, 



a Fifteen specimens. 



