ei2 APPEXDIX. 



(08.) Page 5C3, after Regulus satrapa olivaceus : 



An adult male of li. satrapa from the city of Jlesico in Mr. Lawrence's 

 collection is much deeper and richer colored than even Pacific coast examples, 

 and no doubt represents a race resident on the high mountains of central 

 Mexico, which ilr. Lawrence has named, in manuscript, Megulus satrapa aztecus. 

 The lower parts are light grayish brown, or drab, tlio underlj'ing portion of the 

 plumage pale dull buffy; the white superciliary stripe (tinged with brownish 

 anteriorly) is much more conspicuous than usual, owing to contrast with the 

 very dark color of adjacent portions of sides of head and brownish lower parts ; 

 the secondaries and rcctrices are edged with very bright yellowish olive-green, 

 while the back, scapulars, and rump are a rather dull oiivegreen, changing to 

 dull sooty grayish on the hind-neck. Wing 2.25, tail 1.70. 



(99.) Page 569, after P. caerulea ; 



751rt. Polioptila CEerulea obscura Ridgw. Western Gnatcatcher.' 

 Similar to P. aerulea, but darker and less bhie above; lores darker; super- 

 ciliary streak less distinct ; white on tail-feathers more restincted. Hab. South- 

 western United States (California, Arizona, etc.) and western Mexico. 



(100.) Page 581, Sialia mexicana requires subdivision, as follows: 



c'. Chestnut color of back extremely varial)lc in amount, sometimes entirely 



absent, but in the latter case the chestnut of the breast continuous 



anteriorl}-. 



d'. Back usually (?) with little if any chestnut; blue of upper parts of a 



rich deep "smalt" hue; wing in adult males averaging 4.38. JIab. 



Highlands of southern Mexico. 



S. mexicana Swains. Mexican Bluebird. 



d'. Back usually with much chestnut, often whollj' so, very rarcl}- with a 



mere trace; blue of upper parts varying from rich ultramarine to 



light cobalt; wing in adult males .averaging 4.07. 



e'. Back with median portion more or less blue, the chestnut usually 



in form of lateral patches, rarely reduced to a mere trace on 



each side. ITab. Pacific coast, from British Coiumliia to southern 



California, east to western Nevada, Ciisuatly. during migrations, 



to New Mexico 707. S. mexicana occidentalis (Towns). 



Western Bluebird.' 

 e*. Back wholly chestnut. JLih. Rocky Mountain disliict, and south 



into norihern Mexico 7G7a. S. mexicana bairdi Rinow. 



Baird's Bluebird.' 



' Polioptila CKrulcn obtcura RiDGW., Proc. U. S. Nat. Mtis. v. March 21, 1883, 535, foot-noto. 

 ' Sinlia occitlenliilli Towns., Joiirn. Ac. Nat. Sci. PUilaJ. vii. 1837, ISS. — Sialia mexicana occidentalit 

 Kipcw.. Auk, xi. April, 1394, 151, 15!. 



• Sialia mtxi<:ana bairdi RiDOW., Auk, xi. April, 1S9I, 151, 157. 



