NATURAL SCIENCES OF PHILADELPHIA. 73 



in this genus (see above), shows more rufous than is retained in 

 adult life. The outer webs of the rectrices show quite a rufous 

 edging; but there is none at all on the inner webs; and in all 

 other respects the specimen is a perfect duplicate of some skins 

 of ferox. 



The older names above quoted, including the one it seems ne- 

 cessary to adopt for the species, are given upon Gray's authority. 

 I have not been able to look up the references, but I presume there 

 is no doubt of their pertinence. 



Specimens examined, thirteen. 



5. Myiarchus phseocephalus. 



Myiarclius phwocephalus, Scl., P. Z. S. 1860, 481 ; C. A. B. 233. 

 (Babakoyo, Ecuador.) Lawr., A. L. N. Y. ix. 1869, 237. (Guayaquil.) 



M. inter majores, rostro modico ; olivaceus, caput versus cine- 

 rascens, gula cinerea, ventre flavo, pileo alis caudaque fuscis, his 

 non rufo notatis, remigibus interioribus rectricibusque exterioribus 

 extus albido marginatis; statura 31. crinito par? 



Hab. Ecuador (Frazer, Mus. P. L. S., fide Cat. A. B.). Ins. 

 Puna, Guayaquil (Reeve, Mus. S. I., No. 54,083). 



Obs. My material is insufficient for a satisfactory determina- 

 tion in this case, but the species is different from any other, so 

 far as I can judge from the single imperfect specimen before me, 

 labelled phseocephalus in Lawrence's handwriting, which is the basis 

 of his citation, I. c. It is apparently an old bird moulting, the quills 

 and tail feathers being ungrown. The wings and tail are blackish 



O CD CD 



with the whitish edgings above mentioned, and are without a trace 

 of rufoul ; in these respects the bird is like ferox, but there the 

 resemblance ends, phseocephalus being clear olive, much like 

 crinitus on the back, shading on the head and neck into olivaceous 

 ash, not very different from that of the throat. The pileum shows 

 quite dusky in contrast. The whitish edgings of the remiges and 

 outer tail feathers are strong. The dimensions cannot be given 

 exactly, but the bird seems to have been nearly 8 inches long, 

 with the wing and tail each about 3| ; the bill measures .75 from 

 the front, the tarsus .90. 



Additional information respecting the bird is desirable, since 

 there is room for suspicion that it is a local race of the preceding. 



1872.] 



