JU4 BIRDS OF THE REPUBLIC OF PANAMA PART 2 



CHORDEILES ACUTIPENNIS MICROMERIS Oberholser 



Chordeiles acutipennis micromeris Oberholser, U. S. Nat. Mus. Bull. 86, April 

 14, 1914, pp. 24 (in key), 100. (Xbac, Yucatan.) 



Characters. — Average size smaller ; general coloration darker ; above 

 definitely blackish with a mottling of grayish white, and spotting of 

 buff and cinnamon-buff; ground color of lower surface usually slightly 

 deeper buff. 



The immature bird, mentioned beyond, taken near San Carlos, 

 Panama, on June 21, is heavily washed with cinnamon-buff on the 

 entire dorsal surface, including the wing coverts and rump. 



Measurements. — Males (6 from Panama), wing 167-179 (172.6), 

 tail 83.2-99.0 (92.1). 



Females (11 from Panama), wing 158-177 (167.8), tail 83.2-99.2 

 (91.0). 



Resident. Local; recorded (by specimens) in Chiriqui (Puerto 

 Armuelles, Alanje) ; Los Santos (Pedasi) ; Herrera (Santa Maria) ; 

 Code (Aguadulce) ; Panama (San Carlos, Juan Franco) ; Canal Zone 

 (Farfan, Juan Mina, Barro Colorado Island, Gatun) ; San Bias 

 (Puerto Obaldia) ; and Darien (Jaque). 



Individuals assumed to be this resident race were seen at Sona, 

 Veraguas, June 9 and 11, 1953. 



Near San Carlos, Panama, on June 19, 1953, I noted a number 

 flying, and observed others resting in the road in the entrance to Rio- 

 mar. One of the latter obviously was a juvenile bird. On the evening 

 of June 21, I shot one that was only recently on the wing. Three 

 adults were taken June 22 from a flock of about 30 ; in these the sexual 

 organs were in resting stage. Those that I have collected in other 

 seasons from December to early April usually have been in company 

 with individuals of the migrant race that comes to the Isthmus from 

 the north. 



CHORDEILES MINOR (Forster) : Common Nighthawk, 

 Tapacamino Grande 



With narrow, angular wings in which a white band crosses the 5 

 outer primaries (rarely only 4) near the center. 



Description. — Length 220-245 mm. Outer webs of primaries plain, 

 without prominent bars of brown and buff. Male distinguished from 

 female by a white bar across the end of the tail, otherwise the sexes 

 similar in color. Adult, above black spotted and mottled with cinna- 

 mon-buff, buff, or grayish white ; primaries black, except for white 



