214 Proceedings of the Biological Society of Washington. 



GiEBEL, Thes. Orn., II, 1875, 661 (ref. orig. descr.)- — von Berlepsch, 

 Ibis, 1883, 140 (crit.)- 



Pyrocephalus tuberculifer Gray, Hand-List Birds, I, 1869, 362 (in list of 

 species; range). 



(?) Pyrocephalus gradlirostris Gray, Hand-List Birds, I, 1869, 363 (in list 

 of species; range). 



Myiarchus coalei Ridgway, Proc. U. S. Nat. Mus., IX, 1886, 520 (Orinoco 

 Valley?; orig. descr.; type in coll. U. S. Nat. Mus.). 



Miyarchus (lapsus) nigriceps Gceldi, Bol. Mus. Paraense, III, 1902, 293 

 (SarayAcu and Yquitos, Peru, ex Sclater). 



Myiarchus tricolor (not of von Pelzeln) von Berlepsch and Hartert, 

 Nov. Zool., IX, 1902, 51, excl. extralimital localities and references 

 (Quiribana de Caicara and Nericagua, Venezuela; crit.). 



Myiarchus tuberculifer tuberculifer Hellmayr and von Seilern, Arch. f. 

 Naturg., LXXVIII, 1912, 85 (Cumbre de Valencia and Las Quiguas, 

 Venezuela; range; crit.). — Cherrie, Mus. Brooklyn Inst. Sci. Bull., II, 

 1916, 244 (Caicara, Quiribana de Caicara, and Nericagua, Venezuela). — 

 Chapman, Bull. Am. Mus. Nat. Hist., XXXVI, 1917, 477 (Buena Vista 

 and "Santa Marta, " Colombia; crit.). — Bangs and Penard, Bull. Mus. 

 Comp. Zool., LXII, 1918, 79 (Lelydorp, Dutch Guiana). — Hellmayr, 

 Arch. f. Naturg., LXXXV, 1920, 59, in text (crit.).— Todd and 

 Carriker, Ann. Carnegie Mus., XIV, 1922, B45 (Santa Marta region, 

 Colombia; plum.; crit.). 



Myiarchus tuberculifer nigriceps Chapman, Bull. Am. Mus. Nat. Hist., 

 XXXVI, 1917, 477, part (Andalucia, Colombia). 



Description. — Above between deep olive and citrine drab, passing into 

 dusky black on the pileum, and into grayish on the sides of the head and 

 neck; wings brownish black, the upper coverts broadly tipped and the 

 secondaries externally margined with dark olive buff, becoming yellowish 

 on the tertiaries; inner margins of remiges pale buffy; upper tail-coverts 

 and tail deep brown, with slight olivascent or rufescent edgings ; throat and 

 breast pallid neutral gray; rest of under surface barium yellow, paler on the 

 aides, crissum, and under wing-coverts; "iris brown; bill and feet black." 



In worn plumage all the colors are paler and duller; the yellow below 

 fades and the olive buff edgings on the wings become grayish. In juvenal 

 and first winter dress the remiges and rectrices are prominently edged with 

 ochraceous tawny, which makes the species look very much like some of its 

 allies. Spring specimens may even show traces of this rusty color. In 

 juvenal dress, illustrated by specimens No. 9,250 and 37,672, Collection 

 Carnegie Museum, the yellow below is very pale, the under tail-coverts 

 buffy-tinged, and the back dull dusky olive, with the pileum darker, but 

 less strongly contrasted than in the adult. 



Measurements. — Male (twenty specimens): wing, 76-84 (average, 81); 

 tail, 69-78 (75); bill, 16-18 (17); tarsus, 18-20 (19). Female (twenty 

 specimens): wing, 71-80 (75.5); tail, 65-76 (69); bill, 16-18 (16.8); tarsus, 

 17-19.5 (17.5). 



Range. — From Dutch and British Guiana and Venezuela to northern 



