612 BULLETIN 50^ UNITED STATES NATIONAL MUSEUM. 



hh. Larger, with relatively narrower bill; upper parts grayer; male 

 averaging wing 88.6, tail 82.6, exposed culmen 19.7, tarsus 21.5; 

 female, wing 83.7, tail 78.1, exposed culmen 19. .3, tarsus 21.2. 



(Bahama Islands.) Myiarchus sagrae lucaysiensis (p. 637) 



gg. Posterior under parts white (flanks sometimes tinged with yellow); 

 color of upper parts darker and browner, the pileum conspicuously 

 darker (deep sepia or sooty brown); inner webs of rectrices nar- 

 rowly edged with pale cinnamon-rufous, this sometimes wanting. 

 (Island of Porto Rico, Greater Antilles.) 



Myiarclius antillarum (p. 638) 



hb. Primaries not edged with cinnamon-rufous or cinnamon, but with light olive 



or brownish gray. 



c. Inner webs of third, fourth, and fifth retrices broadly edged with cinnamon or 



cinnamon-rufous. (Wing 89, tail 80, tarsus 24.5, middle toe 14.) (Island of 



Martinique, Lesser Antilles.) Myiarchus sclateri (p. 639) 



cc. Inner webs of all the rectrices wholly grayish brown or dusky. 

 d. Outermost (tenth) primary longer than fourth; upper parts light grayish 

 olive; under parts of body very pale primrose yellow; bill smaller (exposed 

 culmen 15). (Eastei'n Brazil to Cayenne.) 



Myiarchus pelzelni (extralimital) « 



dd. Outermost (tenth) primary shorter than fourth; upper parts deeper grayish 



olive, brownish olive, or dusky olive, the pileum and hindneck sometimes 



gray; under parts of body deeper primrose yellow; bill larger (exposed 



culmen 18.5-22. {Myiarchus ferox.) 



e. Above dark or dusky olive, the auricular region and hindneck similar. 



(South America.) Myiarchus ferox ferox (extralimital)^ 



ee. Above light brownish olive to grayish olive, the hindneck and sides of 

 neck (sometimes pileum also) more or less gray. 

 /. Pileum olive; back olive or brownish olive; gray of neck restricted. 



(Colombia and Panama.) Myiarchus ferox panamensis (p. 640) 



jf. Pileum gray (sometimes tinged with olive) ; back grayish-olive; gray of 

 neck more extended. 

 g. Slate-gray of head and neck duller; yellow of under parts paler. 



(Western Costa Rica.) Myiarchus ferox actiosus (p. 642.) 



gg. Slate-gray of head and neck clearer; yellow of under parts deeper. 

 (Western Ecuador.). .Myiarchus ferox phaeocephalus (extralimital) c 



o- Myiarchus pelzelni Berlepsch, Ibis, 5th ser., i, Apr., 1883, 139 (Bahia, e. Brazil; 

 coll. Count von Berlepsch); Sclater, Cat. Birds Brit. Mus., xiv, 1888, 255 (Bahia; 

 Oyapoc, Cayenne). 



b[MuscicaTpd] ferox Gm.e\.m, Syst. Nat., i, pt. ii, 1788, 934 (Cayenne; based on Tyran- 

 nus cayanensis Brisson, Orn., ii, 398). — Myiarchus ferox C&hanis, Orn. Notizen, i, 1847, 

 248; Sclater, Cat. Birds Brit. Mus., xiv, 1888, 253, part. (I give no additional refer- 

 ences, for the reason that without a large series of specimens representing all parts of 

 the range of the species it would be impossible to determine which particular references 

 belong here. The species, with its geographic forms, is involved in much confusion 

 and requires careful revision. M. phfconotus Salvin and Godwin (Ibis, 1883, 207; 

 Sclater, Cat. Birds Brit. Mus., xiv, 1888, 255), from British Guiana, and M. cephalotes 

 Taczanowski (Proc. Zool. Soc. Loud., 1879, 671; Sclater, Cat. Birds Brit. Mus., xiv, 

 254), from western Peru and Ecuador, are probably, if distinct, forms of this species. 



c Myiarchus phxacephaliis Sclater, Proc. Zool. Soc. Lond., 1860, 281 (Babahoyo, w. 

 Ecuador; coll. P. L. Sclater; Cat. Am. Birds, 1862, 233; Cat. Birds lirit. Mus., xiv, 

 1888, 255 (Babahoyo, Santa Rita, and Balzar Mts., w. Ecuador); Lawrence, Ann. Lye. 

 N. Y., ix, 1869, 237 (Puna I., near Guayaquil). — Myiarchus tyrannulas, var. phxoceph- 

 alus Baird, Brewer, and Ridgway, Hist. N. Am. Birds, li, 1874, 330, footnote (Puna 

 I.). — [Pyrocephalus] phxocephalus Gray, Hand-list, i, 1869, 363, no. 5530. 



