156 LAiuD.i:. 



Young. Lower forehead white, rapidly passing into warm buff 

 ou the crown, nape, and neck, which are thickly streaked with clove- 

 brown, the streaks becoming coutluent before and behind the eye ; 

 feathers of the mantle brown, broadly edged with buff; white band 

 to secondaries conspicuous ; primaries (except the three outer ones) 

 tipped with white ; tail pale brown, edged and tipped with 

 huffish white ; uuderparts white. 



Hah. Coast of Southern Brazil and Argentina, the La Plata, the 

 Parana, and the Paraguay rivers, nearly to their heads. 



a. 2 ad. sk. San Paulo, South Brazil. \V. Davis, Esq. [P.]. 



(Type of R. intercedens.) 



b. S imm. sk. Santa Catliarina, South Brazil, H. Saunders Coll. 



Aug. 4, 1883 (H. M. Harri- 

 soyi, R.K.). 



c. Juv. sk. Buenos Ayres. Alau Peel, Esq. [C.]. 



d. (S vix ad. sk. Bueoos Ayres, Nov. H. Durnford [C.]. 



'6. Rhyn chops melanura. 



Black Skimmer, and var. A, Latham, Gen. Spi. iii. pt. 2, pp. 347-8 

 (1785, partim). 



Rhynchops nigra /3, Lath. Ind. Orn. ii. p. 803 (1790: Guiana). 



Rhyuchops nigra, Licht. Verz. Douhl. p. 80 (1823 : partim) ; Lesson, 

 . Alan. worn. p. 38o (1828 : Chile) ; Fra»er, P. Z. S. 1843, p. 119 

 (Chile) ; Grai/, List B. Brit. Mus., Anseres, p. 174 (1^44): Tsch. 

 8f Cab. Favn. Peruan., Aves, pp. o3, 307 (1846: coast of Peru) ; 

 Schl. Mus. P.-Bas, Sternse, p. 30 (1863 : South America) ; Pelz. 

 Reis. Novara, p. 151(186."): Chile); Wyatt, Ibis, 1871, p. 384 

 (Up. Magdalena Riv., Colombia) ; Scl. ^- Salv. P. Z. S. 1871, p. 566 

 (revision Neotropical) ; Pelz. Orn. Bros. pp. 324, 4C>1 (1871) ; 

 Graj/, Hand-l. B. iii. p. 124 (1871 : partim) ; Allen, Bull. Hare. 

 Coll. iii. p. 359 (1872 : Lake Titicaca) ; ^Scl. S,- Salt: P. Z. S. 1873, 

 p. 310 (Upper Amazons) ; iid. Nomencl. Av. Neotrop. p. 147 (1873: 

 partim) ; Pelz. Verh. z.-b. Ges. Wien, 1873, p. 159 (Callao) ; 

 Taczan. Sf Berlepsch, P. Z. S. 1885, p. 120 (Babahoyo, Ecuador). 



Rhynchops cinerascens, SjH.i; Ar. Bras. ii. p. 80, pi. cii. (1825) ; 

 Reichenb. Natat. tab. xviii. fig. 255 (1848). 



Rhynchops brevipo.stris, Spiv, Av. Bras. ii. p. 80, pi. ciii. (1825) ; 

 Reichenb. Natat. tab. xviii. fig. 256 (1848). 



Rhynchops melanura. Swains. Classif. B. ii. p. 373 (1837); id. An. 

 in Menaff. p. 361 (1837) ; Gray, Gen. B. iii. p. 6-56 (1846) ; Cab. in 

 Schotnb. Reis. Guiana, iii. p. 761 (1848) ; Reichenb. Natat. Novit. 

 Ixviii. tab. cccxxxi. fig. 2623(1850); Licht. Noinencl. Av. p. 97 

 (1854 : Guiana) ; Bp. C. R. xlii. p. 773 (1856) ; Scl. Sr Salv. P. Z. S. 

 1866, p. 201 (Lower Ucayali) ; iid. op. cit. 1867, p. 593 (Mexiana, 

 Lower Amazons); Pelz. Orn. Bras. p. 461 (1871) : Taczan. P. Z. S. 

 1874, p. 562 (Cborillos, Peru) ; Saunders, P. Z. S. 1882, p. 522 

 (Chile) ; Taczan. Orn. Perou, iii. p. 437 (1886) ; Berlepsch ^■ 

 Stolzm. P. Z. S. 1892, p. 400 (Peru). 



Rhynchops fulva (wee L.), Boie, Isis, 1844, p. 191 (Guiana). 



Adult male in breeding-plumage. Similar to the preceding species, 

 but with very little white at the edges of the secondaries and no 



