BIRDS OF NORTH AND MIDDLE AMERICA. 593 



Nyctihiiis comutus (not Caprimidgus comutus Vieillot) Cabanis, Journ. fur Orn., 



1869, 314, footnote (Guatemala). 

 Nyctibins javiaicensis mexicanus Nelson, Auk, xvii, no. 3, July, 1900, 2fi0 (Met- 



laltoyiica, Puebla; coll. U. S. Nat. Mus.). • 

 N[yciibius'] g[nscus] mexicanus Ridgway, Proc. Biol. Soc. Wash., xxv, May 4, 



1912, 91, in text. 



NYCTIBIUS GRISEUS COSTARICENSIS Ridgway. 

 COSTA RICAN POTOO. 



Similar in size to TV. g. jamaicensis but decidedly darker; inner 

 webs of primaries with spots less distinct, often obsolete. 



Adult male. — Length (skins), 365-395 (380); wing, 295-299 (297); 

 tail, 220-225 (222.5); exposed culmen, 22-26 (24); tarsus, 12-12.5 

 (12.2); middle toe, 21.5-22 (21.7).« 



Adult female.— Length (skins), 375-386 (380.5); wing, 276-290 

 (283); tail, 198-202 (200); exposed culmen, 20-20.5 (20.2); tarsus, 

 11.5-12 (11.7); middle toe, 18.5-19.5 (19).« 



Costa Kica (Sarchi, Alajuela, 3,000 feet; El General; Guapiles). 



Nyctibius jamaicensis (not Caprimulgus jamaiceiisis Gmelin) Frantzius, Journ. 



fiir Orn., 1869, 314 (Costa Rica).— Ridgway, Proc. U. S. Nat. Mus., iv, 1882, 



336 (Sarchi, Alajuela, Costa Rica, 3,000 ft.; crit.). — Zeledon, Anal. Mus. 



Nac. Costa Rica, i, 1887, 120 (Costa Rica). — Salvin and Godman, Biol. 



Centr.-Am., Aves, ii, 1894, 399, part (Sarchi, Costa Rica). 

 [Nyctibius] jamaicensis Sclater and Salvin, Nom. Av. Neotr., 1873, 95, part. — 



Sharpe, Hand-list, ii, 1900, 79, part. 

 Nyctibius jamaicensis jamaicensis Carriker, Ann. Carnegie Mus., vi, 1910, 500 



(El General and Guapiles, Costa Rica; crit.). 

 N[yctibius] jamaicensis (typicus) Hartert, Tierreich, Podarg., Caprim., Macropt., 



1897, 16, part. 

 Nyctibius gnseus costaricensis Ridgway, Proc. Biol. Soc. Wash., xxv. May 4, 1912, 



91 (Sarchi, Alajuela, Costa Rica; coll. U. S. Nat. Mus.). 



NYCTIBIUS GRISEUS PANAMENSIS Ridgway. 



PANAMA POTOO. 



Similar to N. g. costaricensis but still darker and size decidedly less. 



Adult male.— Length (skins), 330-360 (344); wing, 270-290 (278.5); 

 tail, 195-210 (201); exposed cuknen, 18.5-23.5 (21.7); tarsus, 

 11-12.5 (11.9); middle toe, 19.5-21.5 (20.4)^ 



Adult female. — (None examined.) 



Panama (Lion HiU; Gatun; Nata, Code; Volcdn de Cliiriqui ?) and 

 Colombia (Concordia, Antioquia; Bogota). 



(?) Nyctibius jamaicensis (not Caprimulgus jamaicensis Gmelin) Salvin, Proc. 

 Zool. Soc. Lend., 1870, 203 (Volcan de Chiriqui, Panama; crit.).c 



o Two specimens. 



b Four specimens. 



c May be the Costa Rican form, since birds from Chiriqui sometimes agree with those 

 from Costa Rica instead of with those from eastern Panamd, a direct comparison being 

 necessary to determine their status. 



3622°— Bull. 50, pt &— 14 38 



