FAMILY TROCHILIDAE 303 



Juvenile, with chin and upper throat grayish white. 



Measurements. — Males (10 from Costa Rica and Panama), wing 

 40.6-42.6 (41.6), tail 53.9-61.4 (56.7), oilmen from base 13.2-14.3 

 (13.8) mm. 



Females (9 from Costa Rica, Panama, and Ecuador), wing 37.5- 

 40.4 (39.4), tail 19.5-24.0 (22.0), culmen from base 13.1-15.6 

 (14.1) mm. 



Resident. Found locally in the mountains of Veraguas and 

 Darien. One report for the Atlantic slope in the Canal Zone, and 

 1 record in eastern Chiriqui. 



The most western record is of a female taken by Mrs. M. E. David- 

 son, January 3, 1932, at about 975 meters on Cerro Chame, a ridge 

 to the south of Cerro Flores in eastern Chiriqui. Salvin and Godman 

 (Biol. Centr.-Amer., Aves, vol. 2, 1892, p. 366) record specimens 

 taken by Arce at Calovevora, Santa Fe, and the Cordillera del Chucii 

 in Veraguas. Between March 9 and 20, 1912, E. A. Goldman col- 

 lected a small series at 600 meters elevation on Cerro Pirre, near Cana. 

 The only other record is of a young male taken by Galbraith and 

 McLeannan on the Atlantic slope near the Panama Railroad and sent 

 to Lawrence. Galbraith noted "but one seen, which was found in a 

 dense forest." (Lawrence, Ann. Lye. Nat. Hist. New York, vol. 7, 

 1861, p. 319). 



At Cana, Goldman found them feeding at high flowers of Ery- 

 thrina in a tall tree, where often he was able to recognize the males 

 by the long tail coupled with their small size. I noted 9 small spiders 

 in the stomach (preserved in formalin) of one of the females that 

 he collected. 



The species was named for M. Convers, a French naturalist resident 

 in Bogota, Colombia. 



CHLOROSTILBON ASSIMILIS Lawrence: Allied Emerald, 

 Colibri Esmeraldino 



Chlorostilbon assimilis Lawrence, Ann. Lye. Nat. Hist. New York, vol. 7, 

 January 1861, p. 292. (Atlantic side of the Isthmus of Panama, along the line 

 of the Panama Railroad.) 



Chlorostilbon panamensis Boucard, Gen. Humming Birds, March, 1894, p. 124. 

 (Panama.) 



Size small; male wholly shining dark green, with white femoral 

 tufts ; female pale gray below, with a black band across ear coverts, 

 a white spot behind eye, and tail tipped narrowly with pale gray. 



Description. — Length 78-85 mm. Adult male, above dark metallic 



