22. MYRMECIZA, 277 



4. Heterocnemis argentata. 



Herpsiloclimus argeutatus, Des Murs, Votj. Casteln., Ois. p. 53, pi. 17. 



fig. 2. 

 MjTmeciza argentata, ScI.P.Z.S. 1858, p. 250 (Upper Amazons); 



id. Cat. A. B. p. 187. 

 Heterocnemis argentata, fid. P. Z. S. 1871, p. 749 (Oyapoc) ; Scl. et 



S(i!v. P. Z. S. 1873, p. 275 (E. Peru) ; iid. Nomencl. p. 73 ; Tacz. 



Orn. Per. ii. p. 59. 

 Heterocnemis albiventris, Pelz. Orn. Bras. pp. 87, 161 ? 



Above blackish plumbeous ; wing-coverts terminated by small 

 round white spots : beneath white ; flanks and crissum plumbeous ; 

 beak plumbeous ; feet pale yellow : whole length 5-3 inches, 

 wing 2-ii, tail IS. Female. Above brown; wings and tail darker; 

 wing-coverts with fulvous terminal spots ; superciliaries and sides 

 of head bright rufous : beneath white ; sides of breast and belly, 

 flanks and crissum bright rufous ; bill and feet pale yellowish. 



Hah. Guiana, Amazonia, and Ecuador. 



The clear white under surface at once distinguishes this species 

 from the two preceding. 



a. c? jr. sk. Oyapoc, Cayenne. Sclater Coll. 



b. c5" jr. sk. Bartica Grove, Brit. Guiana Salvin-Godman Coll, 



( Whiteh/). 



c. 5 ad. sk. Upper Amazons. Sclater Coll. 



d. (S ad. sk. Yquitos, Peru ( Whitehj). Sclater Coll. 



e. 5 ad. sk. Loretovacu, E. Peru {Hau.v- Salvin-Godman Coll. 



well). 



f. d ad. sk. Chamicuros, E. Peru. E. Bartlett [C.]. 



ff. <S ad. sk. Sarayacu, Ecuador {Buckley). Salvin-Godman Coll. 



22. MYRMECIZA*. 



Type. 



DrymopLila, S^c. Zool. Jour^i. i. p. .'^02 (1824) M. loricata.f 



Myriueciza, G. R. Gray, Li.4 Gen. B. p. 34 (1841) M. longipes. 



Myrmonax, Cab. Wieym. Arch. xiii. Bd. i. p. 210 (1847) . M. longipes. 



The series of 12 species ranged under this head is not, it must be 

 admitted, very easily definable from the two following genera. 

 They have, however, in general a longer and more constricted bill 

 and rather longer tarsi. 



Myrmeciza extends from Costa Eica over the northern portion of 

 South America to S. Brazil and Bolivia. 



* See also : — 



(1) M. maynana, Tacz. P. Z. S. 1882, p. 32 (N.E. Peru) ; id. Orn. Per. ii, 

 p. 60 (Peru). 



(2) M. ferruffinea, Lawr. Ami. L. N. Y. vii. p. 470 (Panama). 



t Dri/mojihila was proposed by Temminck about the same date (1825) as the 

 title of 'a new genus of Muscic.'ipida>, so that it would only cause confusion to 

 adopt it here. See Temm. PI. Col. text to pi. 334. 



