FAMILY TROCHILIDAE 309 



in the forest there on March 2 and 25. I have found them especially 

 common in the forests on Cerro Campana. 



Beyond western Panama their range extends through Costa Rica 

 into Nicaragua. 



THALURANIA FURCATA FANNYI (De Lattre and Bourcier) 



Trochilus Fannyi De Lattre and Bourcier, Rev. Zool., vol. 9, September (No- 

 vember) 1846, p. 310. (Rio Dagua, near Buenaventura, Valle, Colombia.) 



Characters. — Adult male, with the forecrown brilliant metallic 

 emerald-green ; violet-blue area of center of back usually less exten- 

 sive. 



Female, slightly duller gray on lower surface, especially on the 

 lower breast and abdomen. 



Measurements. — Males (14 from San Bias and Darien), wing 

 51.5-54.5 (53.2), tail 37.5-43.5 (39.8), oilmen from base 20.5-23.0 

 (22.0) mm. 



Females (11 from San Bias and Darien), wing 48.6-50.9 (49.6), 

 tail 27.8-30.8 (29.1), oilmen from base 20.5-23.6 (21.7) mm. 



Resident. Locally common in forested areas in Darien and eastern 

 San Bias; west possibly to eastern Colon (Portobelo, Cerro Bruja). 



The first records for Panama are of specimens taken by Goldman 

 near 600 meters elevation on Cerro Pirre in March and May 1912. 

 Benson secured others on this mountain in 1928, and I recorded them 

 there in February 1961. Thomas Barbour and N. Brooks secured 

 this race on Cerro Sapo and at Esnape, near Sabalo in the lower Sambu 

 Valley in April 1922. Hasso von Wedel collected a long series in the 

 eastern San Bias, beginning in 1929, at Perme, Ranchon, and Puerto 

 Obaldia. Near Jaque in 1946 I found them in tall, swampy forest 

 where there was little undergrowth, and also along a small stream 

 at the border of old fields. When I shot 1 from a high perch, as it 

 fell 2 others that attacked it in the air drove the body so far to one 

 side that we could not find it. The following season this was the 

 most common hummingbird on the upper Rio Jaque. Here they fed 

 at flowers of Heliconia, and were found especially around thickets of 

 these plants. They ranged in open areas as well as in shaded wood- 

 land. Like most others they are pugnacious and decoyed constantly 

 when we were calling birds. One under such excitement struck a 

 long-tailed hermit so forcefully that both fell to the ground. They 

 were common in the forest on the Quebrada Venado, back of Armila, 

 San Bias, in February and early March 1963. I collected 1 male near 

 Puerto Obaldia on March 16 in heavy shade beside a quebrada. The 



