BIEDS OF NOETH AND MIDDLE AMEBIC A. 



509 



Adult male.— Length (skins), 142-167 (155.2); wing, 64^-70 (67.4); 

 tail, 53.5-63 (58); exposed culmen, 17.6-21.5 (19.8); tarsus, 21-24 

 (22.7); middle toe, 14.5-17 (15.8).« 



Adult female.— Length (skins), 137-159 (146); wing, 60-66 (62.9); 

 tail, 50-60 (54.3); exposed culmen, 17-20 (18.3); tarsus, 20-23.5 (21.8); 

 middle toe, 14-16 (14.9).* 



Southwestern Mexico, in States of Oaxaca (Tehuantepec; Santa Efi- 

 genia; Juchitan), Guerrero (Acapulco; Papayo; Eio Balsas; Mexcala; 

 El Limon; Er Rincon; Dos Caminos, Apipiluluca; Acahuitzotla), 

 Michoacan (LaSalada), and Colima (E.io de la Armeria). 



Campylorhynchus humilis Sclatek, Proc. Ac. Nat. Sci. Phila., viii, 1856, 263 

 (Mazatlan, Sinaloa; coll. Acad. Nat. Sci. Phila.). — Baird, Review Am. 

 Birds, 1864, 107, part (Colima, "Orizaba," Vera Cruz). — Sumichrast, 

 Mem. Bost. See. N. H., i, 1869, 545 (Juchitan, Tehuantepec). — Lawrence, 

 Mem. Bost. Soc. N. H., ii, 1874, 267 (Mazatlan; Colima).— Lawrence, Bull. 

 U. S. Nat. Mus., no. 4, 1876, 13 (Santa Efigenia and Tehuantepec City, 

 Oaxaca). — Salvin and Godman, Biol. Centr.-Am., Aves, i, 1880, 65 (San 

 Juan del Bio, etc.).— Sharpe, Cat. Birds Brit. Mus., vi, 1881, 192. 



ICampylorhynchus] humilis Sclatee and Salvin, Nom. Av. Neotr., 1873, 5. 



Heleodytes humilis rufus Nelson, Auk, xiv, Jan., 1897, 69 (Acahuitzotla, 

 Guerrero; coll. U. S. Nat. Mus.). 



« Twenty-four specimens. 



b Seventeen specimens. 



Specimens from different localities compare in average measurements as follows: 



Locality. 



Middle 

 toe. 



MALES. 



Seven adult males from Oaxaca (Tehuantepec and Santa 

 Eflgenia) , 



Nine adult males from Guerrero (Acapulco, Papayo, etc) . . 



Five adult males from type locality of S. humilis rvfus 

 Nelson 



Three adult males from Michoacan (Rio Salada) 



FEMALES. 



Pour adult females from Oaxaca (Tehuantepec and Santa 

 Efigenia) 



Nine adult females from Guerrero ( Acapulco, etc) 



Three adult females from type locality of H. humilis rufus 

 Nelson 



One adult female from Michoacan (Rio Salada) 



15.9 

 15.9 



16.2 

 15 



14.9 

 15,1 



35 

 H,9 



I am not able to discern any difference of coloration, except that those from 

 Oaxaca seem to be very slightly paler than the others. The difference is so very 

 slight, however, that I would not separate them on this character alone. 



The type of H. humilis rvfus Nelson is in very fresh plumage, and is more uniform 

 in the coloration of the upper parts than any other among the flfty-one specimens 

 examined; but thei seven other specimens from the same locality are quite indistin- 

 guishable from those from other parts of Guerrero, Michoacan, and Colima. 



