BTRDR OF NORTH AND MTDDT.E AMERICA. 877 



wholly united to outer toe, united to inner toe for very nearly its entire 

 length; outer toe, without claw, reaching to much beyond middle of 

 subterminal phalanx of middle toe, the inner toe slightly shorter; 

 hallux about as long as inner toe, not conspicuously stouter, its claw 

 shorter than digit; all the claws moderately curved, sharp, much 

 compressed. 



Ooloratioii. — Above plain olive-green, the |)ileum gray or blackish, 

 the wings and tail dusky with olive-green edgings (more yellowish on 

 secondaries and greater wiiig-co verts); beneath whitish, passing into 

 pale yellow posteriorly. 



Range. — Costa Rica to Peru, Bolivia, and Venezuela. (Two species.) 



KEY TO THIO SPKf'IKS OV PKRTSSOTRICCTTK. 



a. Pilenni ash gray. (Venezuela fo Peru and Bolivia.) 



Perissotriccns ecaiidatus iextralimital)o 

 cm. Pileum blaek m- dusky slafe rolnr. (Costa Riea. i. .Perissotriccus atricapillus (p. 377) 



PERISSOTRICCUS ATRICAPILLUS iLawrencei. 

 BLACK-CAPPED PYGMY FLYCATCHER. 



Adult male. — Pileum plain blaek, duller or more slaty posteriorly; 

 hindneck, sides of neck, auricular region, and suborbital region plain 

 slate-gray; back, scapulars, rump, upper tail-coverts, and lesser wing- 

 coverts bright olive-green; wings and tail slate-black or blackish slate 

 with yellowish olive-green edgings, these broader and clear sulphur 

 yellow on inner secondaries; greater wing-coverts broadly edged with 

 yellowish olive-green or olive-yellow, and middle coverts broadly but 

 not sharply tip]>ed with yellowish olive-green; a white supraloral line 

 extending from nostril to upper eyelid; a white orbital ring inter- 

 ni])ted on middle of upper eyelid and at anterior angle of eye; a 

 black joral spot or streak; chin, throat, and median portion of chest 

 and breast white, passing into pale ash gray on sides of the two latter; 

 ]iosterior under ])arts, together with axillars and under wing-coverts, 

 sulphur yellow; bill black; legs and feet pale brownish (in dried 

 skins); length (skins), 59-66 (63); wing, 35-37.5 (36.1); tail, 14.5-16 

 (15.1); exposed culmen, 10-10.5 (10.2); tarsus, 13-13.5 (13.1); 

 middle toe, 7-7.5 (7.1).^* 



" T[odirostrum\ cniiuldhdn D'Orhigny and Lafresnaye, Mag. do Zool., ann. 7, 1837 

 (Synopsis Avium, 17; "el. ii, pi. 77a 79") (Yuracares, Bolivia); D'Orhigny, Voy. 

 Amer. Merid., Ois., 810, pi. :V.i, ligs. I, 2. — [Todiro.il nnii] ermidaliia Gray, Hand-list, i, 

 1809, 349. no. b2R^.—0rchilm ecnndafus Pelzeln, Orn. l?ras., ii Ahth., ]8(>9, J02; Sclaler 

 Cat. Birds Brit. Mus., xiv, 1888, 89. — reris.sotricais emndalu.9 Oherholser, Proe. V. S. 

 .\at. Mus., XXV, no. 127(), Aug. 30, 1902. <)4; Ihering, RevistaMiis. Paul., vi, 1904,433 

 I Kio .lurud, s. Brazil). 



I have not been a!)le In examine a speeimen (if this sperie.s. 



f> Four specimens. 



