Description of New Birds from Mexico. 59 



H. brunneicapiMus. Southern border of the United States from south 

 western Utah and southern California to Sonora, Mexico, and possibly to 

 the lower Rio Grande, and the states of Nuevo Leon, and Tamaulipas, 

 Mexico. 



H. brunneicapiMus obscums. Tableland of Mexico from near northern 

 boundary to the Valley of Mexico and northern Puebla. This range in 

 cludes all or a large part of the states of Mexico, Hidalgo, Michoacan 

 (northern portion), Queretaro, Guanajuato, Jalisco, Zacatecas, Aguas Cali- 

 entes, San Luis Potosi, Durango, Chihuahua, and Coahuila. 



Several specimens in the series from the southwestern United States, 

 representing true brunneicapillus, as well as others from the region occu 

 pied by obscurus, have a huffy suffusion extending over the upper part of 

 the breast and becoming gradually deeper in shade thence back to the 

 flanks. This appears to be merely a high condition of plumage. 



Vireo nanus sp. nov. Dwarf Vireo. 



Type No. 144890, U. S. Nat. Mus., Biological Survey Coll. Ad. J 1 , 

 Querendaro, Michoacan, Mexico, Aug. 9, 1892. Collected by E. W. Nelson. 



Distribution. Southern border of the Mexican tableland, in Michoacan. 



Description of type. Entire dorsal surface grayish olive-green, becoming 

 browner on head and shoulders and greener on rump and upper tail 

 coverts. Wings and tail blackish-brown, outer borders of feathers edged 

 with olive-green ; lores and superciliary stripe grayish-white ; ear coverts 

 and sides of neck olive-gray. Lower parts white with a faint grayish shade 

 across breast. Two narrow wing bars formed by white edges to primary 

 and secondary coverts ; first primary half the length of second ; fourth 

 primary longest; tail about four-fifths the length of wing; bill black; 

 legs and toes blackish. Wing 54 ; tail 43 ; culinen 10 ; tarsus 17. 



The type and only known specimen of this bird is in badly worn sum 

 mer plumage. The perfect plumage is probably clearer green than shown 

 by the type. The bill is more slender and terete than in any species of 

 Vireo known to me, and is not typically vireonine in this character ; 

 otherwise the bird seems to belong in the genus where it is placed. 



Progne sinaloae sp. nov. Sinaloa Martin. 



Type No. 157171, U. S. Nat. Mus., Biological Survey Coll. Ad. J, 

 Plomosas, Sinaloa, Mexico, July 18, 1897. Collected by E. W. Nelson 

 and E. A. Goldman. 



Distribution. Western slope of the Sierra Madre, Sinaloa (between 2500 

 and 4000 feet alt.). 



Description of adult male. Entire head, neck, breast, flanks, and dorsal 

 surface uniformly glossy blue-black, thinly overlaid with wash of glossy 

 black formed by black edges of feathers ; chest, abdomen, under tail 

 coverts, and concealed spot on each side of back pure white. Wings and 

 tail black. 



Dimensions of type. Wing 136; tail 71 ; culinen 10; tarsus 12,5; depth 

 of fork of tail 20. 



