20 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



I have not been able to examine a specimen of the thir.d American 

 species, (E. superciliaris, and therefore am unable to say whether it 

 agrees in structural details with (E. bistriatus and (E". dominicensis 

 or not. 



KEY TO THE AMERICAN SPECIES AND SUBSPECIES OP CEDICNEilUS. 



a. Auricular and postocular regions without black; upper parts without transverse 



vermiculations or lunulate markings. 



b. Lower breast, abdomen, etc., white; larger (v>ring 234-273, tail 117.5-139, tarsus 



103-122). {(Edicnemus bistriatus.) 



c. Larger (wing 255-273, tarsus 110-122), the Inll and legs stouter; chest more 



grayish, with mesial streaks indistinct or absent. (Southern Mexico to 



western Costa Rica.) CEdicnemus bistriatus bistriatus (p. 20). 



cc. Smaller (wing 234-246, tarsus 103-107), the bill and legs more slender; chest 

 brownish buffy, with mesial streaks distinct. (Venezuela to Amazon 



Valley.) OEdicnemus bistriatus vocifer (extralimital).o 



66. Lower breast, abdomen, etc., light creamy buff; smaller (wing 205-216, tail 104 



106, tarsus 90.5-94.5) (Haiti.) (Edicnemus dominicensis (p. 23) 



aa. Tip of auricular region and a postocular area black; upper parts with transverse 

 vermiculations and lunulate markings. (Western Peru.) 



(Edicnemus superciliaris (extralimital).^ 



CEDICNEMUS BISTRIATUS BISTRIATUS (Wagler). 



MEXICAN THICK-KNEE. 



Adults {sexes alike). — Median portion of pileum (broadly) dusky 

 grayish brown or fuscous, streaked with pinkish buff or pale grayish 



o (?) ^ [dicnemus] vocifer L' Herminier, Mag. de Zool., 1837, cl. ii, not. 84, pi. 84 

 (p. 1) (Maturin, Colombia). — CEdicnemus americanus Swainson, Anim. in Menag., 

 1838, 349 (interior of Guiana). — (Edicnemus bistriatus (not Charadrius bistriatus 

 Wagler) Gray, List Birds Brit. Mus., Grallee, 1844, 59 (Brit. Guiana); Berlepsch, Ibis, 

 1884, 440 (Angostura, Venezuela); Salvin, Ibis, 1886, 177 (Brit. Guiana); Sharpe, 

 Cat. Birds Brit. Mus., xxiv, 1896, 12, part (Bogota, Colombia; Venezuela; Annai, 

 Brit. Guiana; Forte de Rio Branco, Brazil); Robinson, Proc. U. S. Nat. Mus., xviii, 

 1896, 656 (Margarita I., Venezuela); Salvin and Godman, Biol. Centr.-Am., Aves, 

 iii, 1903, 339, part (Colombia; Venezuela; Guiana; Amazonas). — [(Edicnemus] 

 bistriatus Sclater and Sahdn, Nom. Av. Neotr., 1873, 142, part (Colombia; Venezuela; 

 Guiana); Sharpe, Hand-list, i, 1899, 172, part (Colombia; Guiana; Amazonas). — 

 Oedicnemus bistriatus Schlegel, Mus. Pays-Bas, iv., no. 29, 1865, 19, part (Rio Branco, 

 Brazil); Berlepsch and Hartert, Novit. Zool., ix, 1902, 128 (Caicara, Orinoco Valley); 

 Beebe, Zoologica, i, 1909, 75 (La Brea, n. e. Venezuela). — 0[edicnemus] bistriatus 

 Cabanis, in Schomburgk's Reis. Brit. Guiana, iii, 1848, 749. 



^ Oe[dicnemus] superciliaris Tschudi, Wiegmann's Archiv fiir Naturg., x, pt. i, 

 1844, 309 (Peru). — Oedicnenus superciliaris Tschudi, Wiegmann's Archiv fiir Naturg., 

 ix, pt. 1, 1843, 387 (Pacific coast of Peru). — CEdicnemus superciliaris Sclater and SaKdn, 

 Exotic Orn., 1867, 59, pi. 30; Proc. Zool. Soc. Lend., 1868, 176 (Tambo Valley, w. 

 Peru; crit.); 1868, 570 (w. Peru); Taczanowski, Orn. du Perou, iii, 1886, 333; Seebohm, 

 Geog. Distr. Charadriidae, 1887, xv, 87, fig.; Berlepsch and Stolzmann, Proc. Zool. 

 Soc. Lond., 1892, 395 (lea and Lima, Peru); Sharpe, Cat. Birds Brit. Mus., xxiv, 1896, 

 14 (Lima, etc., Peru). — CEdicnemus superciliaris Sclater and Salvin, Nom. Av. Neotr., 

 1873, 142. 



