512 . ALAUDID&. 
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. 
O. chrysolema 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. 
