( 76 ) 

 256. Cercomacra tyrannina (Scl.). 



PyrigUna tyrannina Sol., P. Z. S. 1855 p. 90 (ex BogoU). 



Mmidnapo: dS ad. 3, 7, 8, 11, 14, 16. ii., S <S jnv. 13, 18. ii., ? ? 7, 11, 13, 

 16. ii. "99. 



" Iris seal, sepia brown ; feet slate-colour, plumbeons grey ; bill black above, 

 below slate (below pale grey)." 



(Nos. 11174, 11823, 11855, 11856, 11869, 11911, 11912, 11913, 11932, 11933, 

 11951, 11967, 11968, 12000 Cherrie coll.) 



Bicbaco : ? 18. ix. '98 (Cherrie). 



La Uniou : cJc? 18, 21. xii. 1900 (Andrd). 



Snapnre : S ad. 13. iv., S jnv. 29. iii., ? ? 11, 18. i v. '99 (Klages). 



257. Cercomacra nigricans Scl. 



Cercomacra nigricans Scl., P. Z. S. 1868 p. :i45 (ex Sta. Martha — Bogotil). 

 Pyrigletia mucuUcaudis Scl., P. Z. S. 1858 p. 247 (Trinidad). 



Altagracia : i ad. 17. xii., ? ? 6, 17. xii. '97. (J " Eye dark seal; feet 

 plumbeous, also one c? ad. without label ; bill black above, dark plumbeous below." 

 ? " Eye smoke-grey ; feet plumbeous ; bill black above, plumbeous below." (Nos. 

 9049, 9271, 9272 (?) Cherrie coll.) 



Cercomacra maculicaudis is, the male, C. nigricans the /e male: bnt the latter 

 name was published two pages before, and must therefore be accepted. 



258. Heterocnemis argentata (Des Murs). 



Herpsilochmus argentatus Des Murs, Voij. Cuxteln. (t'lf, (185.0) p. 53, PI. XVII. fig. 2 (typ. ex Nauta 

 Amaz. sup.). 



Maipures : S ad. 19. xii., S (?) juv. 21. .xii., ? ad. 14. xii. '98. 

 La Union : S juv. (? ?) 18. xii. 1900 (E. Am\v€). 



" 6 Iris slate-grey : feet greyish white ; bill black. ? Iris light sepia feet 

 pale vinaceous buff; bill above black, below slate-grey." 

 (Nos. 11465, 11529, 11569 Cherrie coll.) 



259. Myrmeciza swainsoni griseipectus subsp. no v. 



\^Myrmeciza sioainsoni Berl., Ibis 1888 p. 130 (Pto. Cabello, Venezuela).] 

 " ^f. longipea Vieill." ant. — errore. 



M. S mari M. stvainsoni dictae affinis, differt pectore late griseo (nee albo 

 nt in M. swainsoni), lateribas epigastrii cinerascentibus, abdomine medio solum- 

 modo albo. 



Hab. in regione flnminum Orinoco et Caura dictornm et in Guiana Britannica. 



Typus : 6 ad. Caicara, 17. iii. '98 (no 10507 Cherrie coll.). 



This interesting new form is easily distinguishable from typical Myrmecixa 

 swainsoni. Comj>ar6d with a number of skins from Pto. Clabello (Mns. H. v. B.), 

 Trinidad (Mns. Brit.), and Camana (Mus. Triug, Caracciolo coll., received from 

 E. Audr6) the males differ at a glance by their coloration of the underside. In 

 typical swainsoni the entire throat and chest is black, followed directly by the white 

 abdominal area ; bnt in M. swainsoni griseipectus the throat and foreueck only is 

 black, followed by a wide ashy grey pectoral band, which colour also runs along the 



