512 ALATJDID^. 



the hind part of the occiput, the nape, and back of the Colombian bird seem more 

 definitely streaked with dark brown, the throat is whiter, and the primary-coverts more 

 rufescent than in the Mexican bird. These slight characters assume more importance 

 seeing that the two birds are separated geographically by many hundreds of miles, and 

 no trace of an Otocorys is known to occur anywhere in the intermediate country. 



0. chrysoloema seems to be generally distributed over the greater portion of Central 

 Mexico, being doubtless confined to the open country of the plateau. Grayson found 

 it near Mazatlan, which is the only point on the coast of the Pacific where it has been 

 noticed. It occurs also in the State of Oaxaca and at San Mateo, on the Isthmus of 

 Tehuantepec, where Sumichrast says^ that it is probably resident on the plains 

 bordering the Pacific Ocean, being abundant in July and August. This is the most 

 southern limit of its range, for we have no record of its occurrence in Guatemala. 



END OF VOL I. 



