436 PICID^. 



Mazatlan (Forrer), Mazatlan (Grayson ^^ ^^ ^% Tres Marias Is. (Grayson^ ^^ ^°, 

 Forrer), Nuevo Laredo, Topo Chico, Hacienda de las Escobas, Nuevo Leon (F. B. 

 Armstrong), Sierra above Ciudad Victoria, Soto La Marina, Aldama, Tampico, 

 Plains of San Luis Potosi, Aguas Calientes, Sierra de Nayarit, Bolanos, Calvillo 

 [W. B. Richardson), Mineral de San Sebastian near Mascota, Jalisco {Br. A. C. 

 Buller, in Mm. Rothschild), Guanajuato {Bugbs% Santana, Zapotlan, Beltran, 

 Zacoalco ( W. Lloyd), Volcan de Colima ( W. B. Richardson), Valley of Mexico 

 (Sumichrast '^ ^^, Eerrera ^^), Tetelco, Chimalpa (Ferrari-Perez), Jalapa ^o (de 

 Oca 3 27, p, J), G., Edge), Coatepec, Huatusco, Plan del Eio, Cordova (Ferrari-Perez), 

 Orizaba (Sumichrast i°, Botteri ^^), Puente Colorado (Sumichrast ^^), Chietla ^^, San 

 Miguel Molino (Ferrari-Perez), Pinal near Puebla (F. B. G.), Amula (Jfrs. E. E. 

 Smith), Oaxaca (Fenochio), Sola, Juchatengo (M. Trujillo), Merida in Yucatan 

 (Schott^, Gaumer^^), Pocul in Yucatan (Cabot ^), Tunkas, Tekanto (Stone & 

 Baker ^^), Tizirain, Chable (GauTuer ^'^), Cozumel I. (Bevis'^^). 



This little Woodpecker was described by Wagler from Mexican specimens, the 

 precise origin of which was not stated. In all probability they came from the high- 

 lands of Central Mexico. 



It is now known to be generally distributed over nearly the whole of the tablelands 

 of Mexico, and in various forms to the Eio Grande Valley, the western coast of Mexico, 

 the Tres Marias Islands, and to Northern Yucatan. The birds from all these localities 

 have had names bestowed upon them, but from the large series of specimens before us we 

 find it hardly possible to differentiate between them. We thus go rather further than 

 Mr. Hargitt in this conclusion, for he kept the Tres Marias Islands' bird as a subspecies, 

 whereas we are unable to distinguish it from the bird of the opposite mainland, which 

 again seems to merge into the generalized type. 



The bird of the north, which crosses the Eio Grande into Texas and Arizona, has been 

 called Picus hairdi ; it is usually a large bird, and has the white dorsal bands rather 

 wide. It seems to pass gradually into the bird of Central Mexico. The bird of Sinaloa 

 has been called Bryobates scalaris sinaloensis on account of the deficient barring of the 

 outer web of the outer rectrix, in which it agrees with the larger form found in Lower 

 California, B. lucasianus ; this character is decidedly variable, and we are not disposed 

 to lay much stress upon it. The Tres Marias Islands' bird was separated as B. scalaris 

 graysoni chiefly on the absence of spots on the primary coverts, but in this respect our 

 specimens agree with those from Mazatlan and with others from the Valley of Mexico. 

 The bird of Northern Yucatan was described by Dr. Cabot as Picus parvus, and is the 

 Bryobates scalaris parvus of Mr. Eidgway. Birds from this district are small, but can 

 be matched with others from Jalapa and its neighbourhood. 



In the Tres Marias Islands, Grayson says ^, " this Woodpecker is more abundant 

 than on the main coast, where it is also a common species. I have met with it along 



