320 



Specimens listed from Oaxaca show an approach to scapularis 

 in the somewhat paler buff underwing; birds from northwestern 

 Costa Rica average larger than specimens from the rest of the 

 range, thus approaching mesorhynchus. 



Remarks. — Campephilus leucorhamphus Reichenbach {Handh. 

 Scan, Picinae, 1854, p. 393, pi. 648, figs. 4327, 4328, Mexico) is 

 without much doubt referable to this subspecies. Using the 

 measurement as in the foregoing race Reichenbach's wing of 

 6'' 9'' ' equals 168 mm., if in Pied du Roi, or 176.3 mm. if in 

 Rhineland measurement. 



Ceophloeus lineatus mesorhynchus Cabanis and Heine. 



Ceophloeus mesorhynchus Cabanis and Heine, Mus. Hein. pt. 4, 

 heft 2, 1863, p. 86 (Costa Rica). 



Subspecific characters. — Similar to C. I. similis but ground 

 color of posterior underparts more brownish buff, the dark 

 marking on that part of the body generally reduced to obsolete 

 bars or spots; underwing slightly paler buff; bill blackish or 

 bluish-black. Size averaging very slightly larger. 6 males, 

 wing 172-181 (175.6) mm.; bill 36-42 (39.5) mm. 4 females, 

 wing 174.5-184 (179.1) mm.; bill 36-39 (37.5) mm. 



Specimens examined. — Costa Rica: Paso Real, 1 male; Pozo 

 Azul, 1 female; Boruca, 1 male, 1 female; Pozo del Rio Grande, 

 1 male, 1 female; El General, 1 male, 1 female. Panama: Almi- 

 rante, 1 male, 1 female; Chiriquicito, 1 male. 



Range. — Costa Rica (except northwestern portion); western 

 Panama. 



Remarks. — This race is readily distinguished from the other 

 Mexican and Central American forms by its dark bill (nearly 

 black in skins). From the other dark-billed races occurring 

 from the Canal Zone to Peru and eastern Brazil it may be told 

 by its buff (rather than pale yellow or yellowish white) basal 

 underwing surface, and generally by its smaller size. The speci- 

 men from Chiriquicito is intermediate between mesorhynchus and 

 examples from the Canal Zone of the next form. 



Ceophloeus lineatus nuperus, subsp. no v. 



Type. — Museum of Comparative Zoology no. 105969; adult male from La 

 Concepcion, 3000 feet, Santa Marta, Colombia, collected February 13, 1899 

 by W. W. Brown. 



