138 Brewster, New Subspecies of Mexican Birds. [April 



faint greenish olive on the occiput, nape, back, scapulars, and outer edges of 

 the primaries, secondaries, and greater wing-coverts; interscapulars with 

 conspicuous shaft-streaks of purplish chestnut; rump, middle and lesser 

 wing-coverts and both webs of tertials, pure yellow; upper tail-coverts 

 yellow with broad shaft-stripes of dull brownish olive; tail feathers, rich 

 yellow, the shafts black, bordered on the outer webs by dark brown for vary- 

 ing distances from the tips; on the outer pair the dark color extends back- 

 ward about half an inch, on the others from an inch to an inch and three- 

 eighths; on the middle pair it occupies most of the terminal two-thirds of 

 the inner web also ; all the tail feathers are yellow across both webs for half 

 an inch or more from their bases, and on all the brown spaces are bordered 

 outwardly with yellow ; wing quills clove brown with the outer webs edged 

 narrowly with greenish yellow, the inner webs rather broadly with pure 

 yellow, the light edges failing to reach the tips of the outer seven primaries, 

 but on all the remaining quills passing around and forming a more or less 

 conspicuous tipping to the feathers; lining of wing and under wing- 

 coverts pure yellow ; breast and sides finely and sparsely streaked with 

 faint chestnut red. 



Wing, 2.55; tail, 1.79; tarsus, .70; bill from base, .50; from nostril, 

 .32; width at nostril, .12. 



$ ad. (No. 14,152, collection W. Brewster near Oposura, Sonora, Mex- 

 ico, April 14, 1887, J. C. Cahoon, No. 666). Above very pale smoke gray, 

 tinged faintly with yellowish, the wing-coverts and tail feathers more 

 strongly yellowish, the tail feathers with the brown markings more ex- 

 tended than in the $ \ entire underparts very pale straw yellow, the 

 throat and jugulum creamy white. 



Habitat. Southern Arizona, Western Texas (Frontera) 

 and Sonora, Mexico. 



The male of the form just described may be separated at a 

 glance from the male of either cestiva or morco77zi* hy its much 

 yellower coloring above, the rump being usually pure yellow, 

 and the back and wings only faintly tinged with greenish, 

 whereas /worcowz/isordinarilyeven greener above than true ^j-ZzVa. 

 The underparts are always ( .?) more faintly and sparsely streaked 

 than in niorco77ii., while in several of my specimens they are 

 nearly quite immaculate. The purplish streaking of the inter- 

 scapulars is usually a marked feature, but it is not always pres- 

 ent in sonorana^ while I have found it faintly indicated in two 

 specimens of moi'comi. 



The female of sonoratia is quite as strongly characterized as the 

 male. The underparts are so very pale straw yellow as to appear 



* I have examined the type in this connection. 



