28 Nelson, New Birds from Mexico. \j™. 



bill, paler or lighter shade of blue on dorsal surface and grayer on throat 

 and breast. 



Color. — Top and sides of head, neck and rump azure blue; upper 

 surface of wings and tail a duller shade of same, back azure blue washed 

 with ashy. Lower surface from chin to crissum dull ashy thinly washed 

 with blue and shading into white of entire crissum. 



Dimensions of type. — Wing, 170; tail, 148; culmen, 29; tarsus, 46. 



Remarks. — In western-central Zacatecas this form is found 

 intergrading with A. gracilis Miller, and the latter therefore 

 becomes a race of A. seiberi. Compared with A. couchi the 

 form described above is larger, more bluish on middle of back, 

 and the lower surface is grayer. 



Pachyrhamphus major uropygialis, subsp. nov. 

 Sinaloa Pachyrhamphus. 1 



Type, No. 157150, $ ad., U. S. Nat. Mus., Biol. Survey Coll. Plomosas, 

 Sinaloa, Mexico. Collected July 14, 1897 by E. \V. Nelson and E. A. 

 Goldman. 



Distribution. — Western slope of Sierra Madre in Sinaloa and Tepic, 

 Mexico. 



Subspecific characters. — Similar to Pachyramphus major from which 

 it may be distinguished by the distinctly paler rump (lateral upper tail- 

 coverts are nearly white); the paler lower surface of body and larger size. 



Dimensions of type. — Wing, 86; tail, 65; culmen, 15; tarsus, 22. 

 Average of 3 ad. c?s of P. major (topotypes from Jalapa, Vera Cruz, 

 Mexico): Wing, 81 ; tail, 62.7 ; culmen, 15; tarsus, 21. 



Melospiza adusta, sp. nov. 

 Michoacan Song Sparrow. 



Type, No. 144046, $ ad., U. S. Nat. Mus., Biol. Survey Coll. Patzcuaro,- 

 Michoacan, Mexico. Collected July 27, 1892 by E. W. Nelson and E. A. 

 Goldman. 



Distribution. — Known only from vicinity of Patzcuaro, Michoacan, 

 Mexico. 



Subspecific characters. — Similar to but a little smaller than Melospiza 



1 I am indebted to Dr. J. A. Allen, Curator of Mammals and Birds in the 

 Am. Mus. Nat. Hist., New York, for the loan of five topotypes of P. major, 

 collected by Mr. F. M. Chapman at Jalapa, Vera Cruz, Mex. 



