QJ. Brewster 071 Nezv Birds from Mexico and ilie Bahamas. [January 



Mr. Cahooii collected fourteen specimens of this fine new Aiino- 

 phila. Among these the chief variation is in respect to the 

 extent of the ashy tipping on the top of the head and the black 

 spotting on the head and back. Some birds have the greater 

 part of the crown ashy, the chestnut being confined to two stripes, 

 one on each side. Others show only a faint trace of light color 

 on the crown, and this confined to the tips of a few of the central 

 feathers, but nearly all have a distinct, if short, medial light stripe 

 invading tlie forehead from the base of the bill. In still others 

 there is more or less blackish on the forehead with a well defined 

 stripe of black or blackish spots extending from the forehead 

 along each side of the crown to beyond the occiput. Abundant 

 and conspicuous black streaking on the interscapulars is some- 

 times associated with the presence of these black head-stripes, 

 sometimes found without them. In a very few birds the chest- 

 nut post-ocular stripe is also spotted with black. 



The three forms of Aimophila just considered form a gradu- 

 ated series of which A. rufescens is the smallest and most deep- 

 ly colored, A. cahooni the palest and grayest, as well as, 

 probably, the largest, A. mcleodii being in many respects inter- 

 mediate between the two, although apparently most nearly 

 related to A. cahooni. The latter seems to be colored some- 

 what like A. sumichrasti (of which I have seen only descrip- 

 tions) but it is very much larger. The range of variation 

 exhibited by my series of A. cahootii renders it not improbable 

 that all four of the forms just mentioned will be found to inter- 

 grade at points where their respective habitats meet, but the 

 characters which distinguish them are too well marked and the 

 material available too scanty to warrant any present action based 

 on such a hypothesis. I have accordingly presented both the 

 new forms as full species. 



Troglodytes cahooni,* new species. — Cahoon's Wren. 



Sp. Char. — Most nearly allied to T. bninneicollis Scl., but rather 

 smaller, the tail decidedly shorter, the general coloring, both above and 

 beneath, very much paler and grayer, the bai-s on the flanks and abdo- 

 men faint or nearly obsolete. 



$ ad. (No. 14132, collection of W. Brewster, collectoi-'s number 1045, near 

 Oposura, Sonora, Mexico, May 13, 18S7; J. C. Gaboon). Above grayish 

 brown, the rump, tail, and wings slightly reddish but not decidedly rusty; 



*To J. C. Gaboon of Taunton, Mass. 



