20 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
I have not been able to examine a specimen of the third American 
species, H. superciliaris, and therefore am unable to say whether it 
agrees in structural details with Gi. bistriatus and . dominicensis 
or not. 
KEY TO THE AMERICAN SPECIES AND SUBSPECIES OF CEDICNEMUS. 
a. Auricular and postocular regions without black; upper parts without transverse 
vermiculations or lunulate markings. 
b. Lower breast, abdomen, etc., white; larger (wing 234-273, tail 117.5-139, tarsus 
103-122). (Gdienemus bistriatus.) 
c, Larger (wing 255-273, tarsus 110-122), the bill and legs stouter; chest more 
grayish, with mesial streaks indistinct or absent. (Southern Mexico to 
western Costa Rica.).......-.---- Gidicnemus 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 
Walley Nsciescumansemekion nods Gdicnemus bistriatus vocifer (extralimital).¢ 
bb. Lower breast, abdomen, etc., light creamy buff; smaller (wing 205-216, tail 104 
106, tarsus 90.5-94.5) (Haiti.).........-.- Gidicnemus dominicensis (p. 23) 
aa. Tip of auricular region and a postocular area black; upper parts with transverse 
vermiculations and lunulate markings. (Western Peru.) 
CGidicnemus superciliaris (extralimital).} 
(2DICNEMUS 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 
a@(?) & [dicnemus] vocifer L’ Herminier, Mag. de Zool., 1837, cl. ii, not. 84, pl. 84 
(p. 1) (Maturin, Colombia) —CGidicnemus americanus Swainson, Anim. in Menag., 
1838, 349 (interior of Guiana).—Cidicnemus bistriatus (not Charadrius bistriatus 
Wagler) Gray, List Birds Brit. Mus., Gralle, 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. 8S. Nat. Mus., xviii, 
1896, 656 (Margarita I., Venezuela); Salvin and Godman, Biol. Centr.-Am., Aves, 
iii, 1903, 339, part (Colombia; Venezuela; Guiana; Amazonas),—[@dicnemus] 
bistriatus Sclater and Salvin, 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).—O[edicnemus] bistriatus 
Cabanis, in Schomburgk’s Reis. Brit. Guiana, iii, 1848, 749. 
5 Ocldicnemus] superciliaris Tschudi, Wiegmann’s Archiv fiir Naturg., x, pt. i, 
1844, 309 (Peru).—Oedicnenus superciliaris Tschudi, Wiegmann’s Archiv ftir Naturg., 
ix, pt. 1, 1843, 387 (Pacific coast of Peru).—Cidienemus superciliaris Sclater and Salvin, 
Exotic Orn., 1867, 59, pl. 30; Proc. Zool. Soc. Lond., 1868, 176 (Tambo Valley, w. 
Peru; crit. ); 1868, 570 (w. Peru); Taczanowski, Orn. du Pérou, iii, 1886, 333; Seebohm, 
Geog. Distr. Charadriide, 1887, xv, 87, fig.; Berlepsch and Stolzmann, Proc, Zool. 
Soc. Lond., 1892, 395 (Ica and Lima, Peru); Sharpe, Cat. Birds Brit. Mus., xxiv, 1896, 
i ees etc., Peru).—Cidicnemus superciliaris Sclater and Salvin, Nom. Av. Neotr., 
