194 FORMICAIUIDJE. 



21. Thamnopbilus nigro-cinereus. 



Thamuopliilus niOTo-cinereus, Sclater, T. Z. S. 1855, p. 19, pi. 81, et 

 1858, p. 212 ; id. Edlnb. Phil. Journ. n. s. i. p. 240 ; id. Cat. A. B. 

 p. 173 ; Scl et Salv. P. Z. S. 18G7, p. 575 (L. Amazons) ; iid. 

 Nomencl. p. 70. 



Above dark cinereous ; head and upper back black, with a largo 

 concealed white blotch at the base of the interscapulars ; wings 

 black, with narrow white margins to the wing-coverts ; tail black, 

 tips of the rectrices and a narrow bar on the outer web of the outer 

 pair white : beneath cinereous, rather blackish on the breast ; under 

 wing-coverts white ; bill and feet black : whole length G inches, 

 wing 3-2, tail 2-4. Female. Above brown, with a concealed white 

 spot on the interscapulars ; head plumbeous : beneath ferruginous 

 brown. 



Hah. Lower Amazons. 



ff. c? ad. sk. Rio Tocantins (Tr«//««'). Sclater Coll. 



(Type of the species.) 

 b. (S ad. sk. Eio Tocantins ( IVullnce). Salvin-Godman Coll. 



c,d. (S ?ad. sk. Mexiaua ( Wallace). Sclater Coll. 



e. c? ad. sk. L. Amazons. Eyton Coll. 



/,(7. c? $ad. St. Para. R. Graham, Esq. 



22. Thamnophilus bridges!. 



Thamnophiliis bridgesi, M. P. Z. S. 185G, p. 141, et 1858, p. 212 

 (Veragua) ; Salnn, P. Z. S. 1867, p. 144, et 1870, p. 194 (Veragua) ; 

 Laicr. Ann. L. N. Y. ix. p. 107 (Ct)sta Rica) ; Frantz. J.f. O. 

 1869, p. 305 (Costa Rica) ; Scl. et Salv. Nomencl. p. 70. 



Above cinereous with a slight brownish tinge ; head black, with 

 narrow but distinct white shaft-lines ; wings black, coverts with 

 round white apical spots ; tail black, with slight white terminal 

 spots : beneath cinereous as above ; throat, breast, and upper belly 

 marked with elongated white shaft-spots ; under wing-coverts 

 white ; bill and feet black : whole length 5-9 inches, wing 2-7, tail 

 2'7. Female similar. 



Hah. Yeragua. 



a. c? ad. sk. Bugaba, Chiriqui (vlrce). Salvin-Godman Coll. 



b. 5 ad. sk. Mina de Chorcba, Chiriqui {Arce). Salvin-Godman Coll. 



c. d. Ad. sk. Chiriqui {Arce). Sclater CoU. 

 e. cJad. st. Chiriqui. Piu-chased. 



23. Thamnophilus nigriceps. (Plate XII.) 



Tbamnopliilus nigriceps, Sd. P. Z. S. 1868, p. 571 (Colombia) ; Scl. 

 et Sale. Nomejicl. p. 70. 



Above reddish brown ; wings and tail chestnut ; head black, with 

 very fine white shaft-lines : beneath greyish, throat and breast 



