360 BIRDS OF THE REPUBLIC OF PANAMA PART 2 



lesser wing coverts dark green ; tail dull bronze, tipped very narrowly 

 with grayish white ; wings dusky, with a purplish sheen ; primary co- 

 verts very dark green ; outer web of outermost primary edged with 

 buffy white, to produce a very narrow light line for the full length of 

 the feather ; lores deep black ; a small white spot immediately behind 

 the eye ; throat metallic bluish green, with the gray feather bases show- 

 ing irregularly ; breast and sides dark bronze-green, abdomen with this 

 color partly obscured by brownish gray ; anal region white ; under tail 

 coverts dull bronze-green, edged with light buff. 



Adult female, entire crown and occiput dull, dark green, with 

 the feathers tipped narrowly with sooty black ; lores and cheeks sooty 

 black; a small white spot behind the eye; rest of upper parts as in 

 male, except that the tail is duller bronze-green, and is tipped promi- 

 nently with light gray ; throat, lower cheeks, and foreneck brownish 

 gray, edged and tipped with dull buff, to form indistinct lines ; sides 

 and flanks dark green ; breast and abdomen dull brownish gray, 

 washed with dull green. 



Bill in both sexes black, with the cutting edge of the mandible dull 

 brownish white. 



Measurements. — Males (10 from Chiriqui), wing 74.5-80.5 (77.6), 

 tail 43.5-49.8 (46.7), culmen from base 33.2-37.3 (35.5) mm. 



Females (10 from Chiriqui and Costa Rica), wing 69.4-74.2 (72.4), 

 tail 39.7-42.8 (41.1), culmen from base 37.7-41.2 (39.2) mm. 



Weight, 1 male, 5.7 grams. (Hartman, Auk, 1954, p. 468.) 



Resident. Recorded on the slopes of the great volcano in western 

 Chiriqui, from 1,600 to 2,400 meters elevation ; reported only from the 

 Pacific side. 



To the present this large hummingbird has been found near Cerro 

 Punta, where I have seen it at 1,750 and 2,200 meters, near Bambito 

 at 1,600 meters, and in the region near Boquete, where it has been 

 recorded at Cerro Copete, Velo, and near the Rio Caldera, at 1,600 

 meters, above the town. 



In early March 1955, at 2,200 meters above Bajo Grande, as I 

 followed the old trail that led from Cerro Punta to Boquete, I came to 

 a small, abandoned clearing in a protected hollow. The ground was 

 overgrown with a tangle of weeds over which stood great, yellow- 

 flowered composites 3 to 3^ meters tall. Around these hovered a dozen 

 or more Rivoli's hummingbirds, probing blossom after blossom with 

 their long bills, and then stopping on some little branch to rest. Any 

 intruding companion of their own kind, or one of the other three 

 species of hummers also present, roused them to the usual dashing 



