BIEDS OF NORTH AND MIDDLE AMEBICA. 593 



Nyctilvus comutus (not Caprimulgus comutas Vieillot) Cabanis, Joum. fiir Om., 



1869, 314, footnote (Guatemala). 

 Nyctibius jamaicends mexkanus Nelson, Auk, xvii, no. 3, July, 1900, 260 (Met- 



laltoynca, Puebla; coll. U. S. Nat. Mus.). 

 I^yetilim] g\riseus\ mexicanus Ridoway, Proc. Biol. Soc. Wash., xxv, May 4, 



1912, 91, in text. 



NYCTIBIUS GRISEUS COSTARICENSIS Ridgway. 

 COSTA RICAN POTOO. 



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



bs of primaries with spots less distinct, often obsolete. 



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



1, 220-225 (222.5); exposed culmen, 22-26 (24); tarsus, 12-12.5 



1.2); middle toe, 21.5-22 (21.7).'' 



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



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



.5-12 (11.7); middle toe, 18.5-19.5 (19).'' 



Costa Eica (Sarcbl, Alajuela, 3,000 feet; El General; Gudpiles). 



Nyctibius jamaicensis (not Caprimulgiis jamaicensis Gmelin) Fhantzius, Journ. 



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



336 (Saichi, Alajuela, Costa Rica, 3,000 ft.; crit.). — Zeled6n, Anal. Mus. 



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



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

 [Nyctibius] ja-maicensis Sclatbr and Salvin, Nom. Av. Neotr., 1873, 95, part.— 



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

 Nyctibius jamaicensis jamxdcensis Careikeb, Ann. Carnegie Mus., vi, 1910, 500 



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

 NJyctibius'] jamaicensis (typicus) Hahteet, Tierreich, Podarg., Oaprim., Macropt., 



1897, 16, part. 

 NyctiMus griseus 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 stiU darker and size decidedly less. 



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



il, 195-210 (201); exposed culmen, 18.5-23.5 (21.7); tarsus, 



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



AdultfewMle. — (None examined.) 



Panama (LionHiU; Gatlin; Nata, Cocl6; Volcan de ChiriquI ?) and 



lombia (Conc6rdia, Antioquia; Bogota). 



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

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



■ Two specimens. 

 I Four specimens. 



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

 tn Costa Rica instead of with those from eastern Panam^, a direct comparison being 

 ;essary to determine their status. 

 3622°— Bull. 50, pt 6—14 38 



