176 TYRANNIDiE, FLYCATCHERS. GEN. 109, 110. 



common. Aud., vii, 341, pi. 490; Bd., 198. Var. difficilts Bd., 198 

 (ill text), Coop., 328, is the paler western form. . . . flaviventris. 

 f;\^) Hammond's Fly catcher. Above, olive-gray, decidedly grayer or even 

 "^ ashy on the fore parts, the whole throat and breast almost continuously olive- 

 gray but little paler than the back, the belly alone more or less decidedly 

 yellowish; wing-markings and eye-ring dull soiled whitish; bill very small, 

 and extremely narrow, being hardly or not i wide at the nostrils ; this distin- 

 guishes the bird from all but minimus aud obscurus ; under mandible usually 

 blackish; tail usually decidedly forked, more so than in other species, though 

 in all of them it varies from slightly rounded to slightly emarginate ; outer 

 tail feather usually whitish-edged externally (a character often shown by 

 traillii and minimus), but not decidedly white. About the size of trcdllii, 

 but not so stoutly built ; wings aud tail relatively longer ; feet as in minimus. 



Western United States. Bu.,199; Coop., 330 hammondii. 



j \ Wrighfs Flijcatcher. Colors not tangibly different from those of traillii 

 ■^ or minimus, but outer web of outer tail feather al)ruptly white in decided 

 contrast. General dimensions approaching those of acadicus, owing to length 

 of wings and tail ; wing 2§ to nearly 3 ; tail 2^-2| ; tarsi about f ; bill 

 about i, extremely narrow (much as in Saijornis fuscus), its width at the 

 nostrils only about J its length. Southwestern U. S. Bd., 200, 922; 



Coop., 329 obscurus. 



Obs. The foregoing account, carefully prepared after examination of a great 

 amount of material from all parts of the countrj', will probably suflice to determine 

 ninety out of a hundred specimens ; but I confess it does not entirely satisfy me, 

 and, as it does not fallj' answer all the requirements of the case, it must be regarded 

 as provisional. At the same time I must say, that the onlj' alternative seems to 

 be, to consider all the foregoing (excepting acadicus and flaviventris, perhaps) as 

 varieties of one species ; but for this I am not prepared. 



110. Genus MITREPHOEUS Sclater. 



-<_L2- Bicff-breasted Flyccdclier. Coronal feathers and rictal bristles longer than 

 in Empidonax, aud general cast of the plumage bufiy. Above, dull grayish- 

 brown tinged with olive, particularly on the back ; below, pale fulvous, 

 strongest across the breast, whitening on the belly ; no fulvous on the fore- 

 head ; sides of head light brownish-olive ; wiugs aud tail dusky, outer web . 

 of outer tail feathers, edges of inner primaries except at the base, and tips 

 of wing coverts, whitish ; iris brown ; bill yellow below, black above ; feet 

 black; 4| long; extent 7J ; wing 2J ; tail 2 ; tarsus .55; middle toe and 

 claw .45 ; bill .40. Fort Whipple, Arizona. Fmjyidonax pi/gmceus Coues, 

 Ibis, 1865, 537 ; M. xmllescens Coues, Proc. Phila. Acad. 1866, 63 ; Coop., 

 334; Elliot, pi. 19. My original specimens, affording the descriptions 

 quoted, and the first known to have been taken in the United States, do not 

 appear to bo specifically distinct from fulvifrons of Giraud ( B. of Tex. 

 pi. 2, f. 2), which may itself bo the same as a Mexican species of 

 prior name. fulvifrons var. pallescens. 



