61 PROCEEDINGS OF THE ACADEMY OP 



dusky ; the outer web of the external rectrices, the margins of the inner pri- 

 maries, except just at their base, and the tips of greater and median coverts, 

 dull white, with no tint of olive or ferrugineous. Iris brown ; upper mandible 

 and feet black, lower mandible and mouth bright yellow. Length 4 - 75 ; 

 extent 7'30 ; wing from the carpus 2-15 ; tail 2 # 00 ; tarsus - 55 ; middle toe 

 and claw -45 ; bill above -40. 



Habitat. Fort Whipple, Arizona. A summer resident, arriving early in 

 May. Rare. Found in similar situations with Empidonaces. 



I have before me but a single specimen of Mitrephorus fuh'ifrons, which, 

 judging from the rufous in the white of the wing margins, and general " feel" 

 of the feathers is probably an autumnal or immature bird. It was received 

 from Mexico through the Maison Verreaux, and labelled by those gentlemen. 

 From this specimen, my two examples, taken in May, at Fort Whipple, differ 

 conspicuously in color ; the upper parts being dull grayish brown, with hardly 

 a tinge of olivaceous, instead of decided fulvous brownish olive ; the lower 

 parts being pale fulvous, only well marked on the breast, other portions, par- 

 ticularly the abdomen, being nearly white ; whereas, in the specimen of fulvi- 

 frons, the whole under parts are very strongly fulvous, almost ferrugineous, 

 only a little lighter on the chin and on the abdomen, which latter is rusty 

 yellow instead of nearly white. The forehead and lores of my specimens 

 exhibit no trace of the color which has given the other species its distinctive 

 name. 



I can, however, detect no differences whatever in size or form between the 

 two. I consider it as quite possible that the discrepancies above indicated 

 may prove to be only those of age or season. Still, a decided difference in 

 color does exist, sufficient to warrant me in describing the species as distinct, 

 for the present, at least. The range of habitat of the two is quite diverse. 



No comparisons with M. phozocercus or aurantiiventris are needed. 



Dr. Sclater, in instituting his species plueocercus, inclines to the opinion 

 that it may be the species indicated by Swainson as Tyrannula affinis. (See 

 citation and copy of Swainson's description, antea.) It is quite likely that 

 Swainson had in view some species of Mitrephorus ; but I think rather the 

 present species than plueocercus, as the expression "beneath pale fulvous" 

 hardly applies to the latter, in which the parts are very strongly colored 

 indeed. However, Swainson's description is so vague and meagre, that it is 

 hardly worth considering at all, in view of the impossibility of identifying it 

 positively with any species. 



I use another name than that under which I first mentioned the species in 

 Newton's Ibis, as above ; since the species being not smaller than fulvifrons, 

 the name pygmceus would convey an erroneous impression regarding it. 



(70.) Pyrocephalus mexicanps Sclater. 



Pyrocephalus rubineus, Baird, B. N A., 1858, p. 201, (New Mexico and 



Arizona,) and of North American writers. Not Muscicapa rubineus 



Bodd., nor Muscicapa coronata Qua. Wagier, which refer to the South 



American species. 



Pyrocephalus nanus, Woodhouse, Sitgreave's Report, 1853, p. 75. Not 



the true nanus. 

 Pyrocephalus mexicanus, Sclater, P. Z. S., 1859, p. 45. 

 Not found as far north as Whipple, among the mountains, though it 

 extends up the valley of the Colorado to an equally high latitude. Common 

 in the valley of the Gila and Southern Arizona generally. 



Without the material for forming an opinion of my own, I follow Dr. Sclater 

 in separating the Mexican bird from that of South America. 



TVRDJDM. 



71. Tuedus (Planesticus) migratorius Linn. 



Abundant ; resident ; a few winter, and fewer still breed ; exceedingly 

 numerous in spring and fall. 



[March, 



