358 TROCHILIDZ. 
P. Z.S. 1878, p. 70”; 1883, p. 451 *'; Sumichrast, La Nat. v. p. 250”; Nutting, Pr. U.S. 
Nat. Mus. vi. p. 394”; Ridgw. Pr. U. 8. Nat. Mus. viii. p. 573”; Ferrari-Perez, Pr. U. S. 
Nat. Mus. ix. p. 157”; Herrera, La Nat. (2) i. p. 322”. 
Supra nitenti-gramineo-viridis ; capite summo obscuro, uropygio magis nitido: subtus abdomine medio sordide 
albo, pectore albo, hypochondriis viridi lavatis, gula micanti-rubra, mento et regione infra oculos nigris ; 
caudee rectricibus mediis dorso concoloribus, reliquiis chalybeo-nigris: rostro nigro. Long. tota 3°5, 
ale 1°5, caude rectr. longissimis 1°1, rectr. med. 0°65. 
Q supra mari similis: subtus alba, caude rectricibus lateralibus ad basin griseis, apicibus albis et fascia sub- 
terminali nigra notatis. (Descr. maris et feminw ex Ajusco, Valley of Mexico. Mus. nostr.) 
Hab. Eastern Nortu America from Canada southwards.—Mexico, Sierra de Victoria, 
Escandon, Tamesi, Tampico (W. B. Richardson 8), Misantla (Ff. D.G.13), Coatepec 1°, 
Jalapa* (de Oca, Herrari-Perez®), Mirador (Sartorius, in U. S. Nat. Mus.), Orizaba 
(Bottert, Sumichrast **), Playa Vicente (M/. Trujilio'*), Ajusco in the Valley of 
Mexico (W. B. Richardson '*), Valley of Mexico (White ®, de Oca ®, Sumichrast 22, 
Herrera), Puebla (W. B. R.1%), Amecameca (Ff. D. G.13), Volean de Colima 
(W. B. &.*), Chilpancingo, Venta de Zopilote, Amula, Acaguizotla (Urs. H. H. 
Smith'*), Tonaguia (M. Trujillo *), La Parada, Tuxtla, Oaxaca > (Boucard), Santa 
Efigenia (Swmichrast * *°), Chimalapa and Tehuantepec (W. B. Richardson '8), 
Northern Yucatan (Gawmer *), Merida in Yucatan (Schoté), Progreso, Holbox I. 14, 
Cozumel I.1! (Gaumer) ; Guatema.a (Constancia 1”), Santa Ana in Peten, Coban? 9, 
San Gerénimo %, Duefias‘ °, Acatenango (0. 8.3 & F. D. G.), Rincon in San Marcos, 
Panajachel (W. B. Richardson); Nicaragua, Omotepe I. (Nutting 2%); Cosra 
Rica 1° 16, Bebedero de Nicoya (Arcé!*), Las Cruces de Candelaria (v. Frantzius 16, 
Zeledon*), San José (Boucard ?°); Panama, Volcan de Chiriqui (Arcé 1°). 
This well-known bird is very common in Mexico and Central America during the 
winter months, all or nearly all the specimens migrating to North America in the 
spring, and remaining there to breed. In September and October de Oca says! 
T. colubris is very common at Jalapa and Coatepec as well as in the Valley of Mexico, 
where it may also be seen in November. M. Boucard also speaks of its abundance in 
Mexico, but he says that a few individuals remain to breed. This statement is 
confirmed to some extent by specimens obtained by Mr. Richardson in the State of 
Tamaulipas in the successive months of March, April, and May, at which time it also 
occurs on the north side of the mouth of the Rio Grande in Texas. Villada 17 also says 
a few individuals remain to breed in the Valley of Mexico, and he describes the nest 
in some detail. 
In its southern migration it spreads to Nicaragua, Costa Rica, and Chiriqui, but in 
much diminished numbers, and it does not seem to pass beyond the last-mentioned 
district. 
During its stay in the south, 7. colubris is found at all altitudes from the sea-level at 
Tampico and in Yucatan to as high as 8000 feet in the Valley of Mexico. 
