TINNUNCULUS. 125 
near Guadalajara (Lloyd), Sierra Madre del Sur (Mrs. H. H. Smith), Tehuantepec 
(Sumichrast®7, Richardson), Valley of Mexico (Herrera’®, Le Strange), city of 
Mexico (White), Mexicalcingo, Culhuacan, Chimalpa, Ixtapalapa (Ferrari- 
Perez), Topo Chico, Rio Salado, Nuevo Leon, Nuevo Laredo, Altamira, Tampico 
(Armstrong), Hermosillo in Sonora, Huexotitla, Chietla 6, Chachapa, Puebla, 
Naulingo, Puente, San Baltazar, Santo Domingo (Ferrari-Perez), J alapa (de Oca 3), 
Las Vigas, Las Posadas, Hacienda Tortugas, Rio Rancho Nuevo, Santana, Rio de 
San Juan, Orizaba (Ferrari-Perez), Totontepec, Juchatingo, Coatepec, Cofre 
de Perote (IM. Trujillo), Oaxaca, La Parada 2}, Villa Alta 24 (Boucard), Misantla, 
Atlixco, Patzcuaro, Tabi in Yucatan (F. D. G.), Cordova (Sailé 20), Chalchicomula, 
Volcan de Orizaba, Popocatepetl 11, Ixtaccihuatl 11, Tzamal !°, Progreso !° (Stone & 
Baker“), N. Yucatan (Gaumer *), Merida (Schott *), Chichén Itza ( Chapman 18) ; 
British Honpuras, Orange Walk, Belize (Blancaneaux); Guatemata (Constancia *3), 
Coban, Volcan de Agua above San Diego, San Gerénimo, Tactic, Iguana, Motagua 
Valley, Duehas (0. S. & F. D. G.?"); Honpuras, Omoa (Leyland 26), San Pedro 
(Whitely °°), Tigré Island, Bay of Fonseca (Taylor 22); Nicaragua, Chontales 
(Belt **), La Libertad, San Rafael del Norte, Leon (Richardson), Rio Escondido 
(ftichmond ™*), San Juan del Sur+!, Sucuyd 42 (Nutting) ; Costa Rica (v. Frant- 
zius *8, Boucard*’), San José (Carmiol *4, Nutting +4, Cherrie”), Orosi (Kramer), 
Alajuela, Cartago (Zeledon *), Reventazon, Jiménez, Talamanca, Miravalles 17, Juan 
Vihas (Underwood), Irazu (Rogers, Nutting **), La Palma, Gulf of Nicoya 
(Nutting *°); Panama, Santa Fé, Calobre, Volcan de Chiriqui (2. Arcé 20 St), 
In a paper on Tinnunculus sparverius and its allies by Mr. Edgar Mearns 49, the 
author recognizes an eastern and a western form, the latter being separated by him as 
T. deserticolus. The characters for the separation of 7’. deserticolus depend chiefly 
upon the plumage of the female, the male presenting no definite peculiarities. While 
acknowledging that specimens from Western North America differ as regards the 
barring of the tail and some unimportant characters, we have in our collection eastern 
birds, and others, more or less intermediate, which cannot be distinguished from the 
western form. The range of 7. deserticolus has been traced by Mr. Mearns to 
Mazatlan *°, and by Prof. Allen to Sonora °°, and we have specimens from Guatemala 
and Nicaragua which appear to be likewise referable to this western race. 
With the exception of the Arctic portions of the North-American continent, this 
Kestrel is distributed in summer over the greater part of the United States and Canada, 
being most plentiful in the western and southern regions. According to Grayson ®, 
T. sparverius probably breeds also in certain portions of Central America; we ourselves 
found the species generally distributed in Guatemala, where we believed it to be 
migratory; but in Mexico, &c., Sumichrast, Richmond, Cherrie, and other good 
observers record the bird as a winter visitant only. On Popocatepetl and Ixtaccihuatl 
16* 
