20 



NORTH AMERICAN FAUNA 65 



Zenaida asiatica panamensis^ new subspecies 

 Panamanian White-winged Dove 



CHARACTERS 



Smaller than collina, especially in wing and tail length, and aver- 

 aging paler brown on the back and breast. Its undertail coverts are 

 paler than those of collina which average darker gray. It lacks the 

 rich cinnamon brown tones of the back and breast characteristic 

 of most specimens of australis. 



DESCRIPTION 



Type, U. S. Nat. Mus. No. 476630, adult male, breeding, Rio Pocn', 

 Puerto Aguadulce, Code, Panama, March 12, 1962, collected by A. 

 Wetmore. Crown dark vinaceous drab; hindneck vinaceous drab; back 

 and tertiaries buffy brown; middle rectrices mummy brown; throat 

 slightly paler than sayal brown; breast drab; abdomen pearl gray; and 

 flanks pale quaker drab. 



Several of the males from Aguadulce are slightly paler on the 

 breast and upper parts than the type specimen. Five of the eight have 

 the middle pair of rectrices marked with a more or less visible 

 terminal band of grayer or paler brown. 



The female. No. 477593, is slightly paler and less vinaceous brown 

 on the breast, and slightly grayer brown on the upper parts. Her 

 crown and nape are a paler vinaceous drab than those of the males. 



Compared with collina, most specimens of panamensis are paler 

 and grayer, especially on the back and tertiaries; the chin is grayer and 

 less brownish; the middle rectrices are lighter brown or grayer and 

 often show a paler terminal bar, whereas in collina they are usually 

 more uniformly brown. 



Z. a. australis is darker, with a cinnamon brown tone to the breast, 

 and this color usually extends farther down on the under parts than 

 in panamensis, The back, scapulars, tertiaries, wing coverts, and middle 

 rectrices are a darker brown in australis, and its middle rectrices 

 usually are uniformly colored and lack the paler terminal band so 

 common in panamensis. Bath male and female panamensis have sig- 

 nificantly shorter wings than collina and australis. 



MEASUREMENTS 



Males (9 specimens) : wing 150.0-158.0 mm. (av. 154.8), tail 106.5- 

 114.0 (110.3), tarsus 23.5-26.0 (24.7), and culmen 19.0-20.5 (19.8). 

 Females (2 specimens): wing 150.0-151.5 mm. (av. 150.8), tail 104.0- 

 105.0 (104.5), tarsus 23.8-24.0 (23.0), and culmen 20.0. 



RANGE 



Resident and fairly common in the mangrove swamps around the 

 shores of the Gulf of Parita on the northeastern coast of the Azuero 

 Peninsula, from the lower Rio Parita (Monagrillo) , Herrera, to the 



