FAMILY TROCHILIDAE 333 



Pedro Gonzalez, San Jose, and Santelmo) ; also from islas Taboga, 

 Taboguilla, and Urava. off the Pacific entrance of the Canal. 



This subspecies is widely distributed through the Pearl Islands 

 in areas of open forest. On Isla San Jose I found them usually in 

 the valleys of small streams, and also in the mangrove swamps. On 

 the smaller islands they were scattered through the open woodlands. 

 It has been interesting to record that the population of Isla Taboga 

 off the Pacific entrance of the Panama Canal differs from that of the 

 adjacent mainland and is like that of the Pearl Islands. Here, I re- 

 corded them in stands of dry, woody-stemmed growth standing tall 

 in old fields, and also feeding at flowers, sometimes in the tops of 

 the trees, occasionally in gardens in the town. They ranged also on 

 the nearby smaller islands of Taboguilla and Urava. 



AMAZILIA TZACATL TZACATL (De la Llave) : Rieffer's 



Hummingbird, Colibri Colicastano 



Trochilus Tzacatl De la Llave, Registro Trimestre, vol. 2, no. 5, January 

 1833, p. 48. (Mexico.) 



Of medium size, with tail chestnut brown. 



Description. — Length 95 to 100 mm. Male, upper and under tail 

 coverts, tail and lores chestnut-brown ; tail tipped with bronze ; rest 

 of upper surface, including the wing coverts, and the upper breast 

 and sides green ; a small, partly or wholly concealed tuft of white on 

 the center of upper sides ; primaries and secondaries black with a 

 slight sheen of purple ; lower breast gray ; abdomen and tibia white, 

 the latter with the feathers elongated and fluffy. 



Female, like male, but lower breast paler gray ; feathers of throat 

 and foreneck edged narrowly with dull white to produce a scalloped 

 appearance (found also in lesser amount on the throat of some males). 



Juvenile, lower breast and sides washed somewhat with cinnamon ; 

 feathers of lower back and rump tipped narrowly with chestnut- 

 brown. 



An adult male, taken January 7, 1962, at Chiva Chiva, Canal Zone, 

 had the iris dark brown; distal half of the maxilla, the cutting edge 

 back to the gape, and the tip of the mandible, dull black ; rest of bill 

 dull red; distal area of tarsus, toes, and claws dull black. In life 

 the base of the bill, particularly in adult males, appears bright red, 

 but this color becomes dull immediately when the bird is dead. 



Measurements.— Males (10 from Panama), wing 56.3-60.9 (58.8), 

 tail 31.1-34.8 (33.2), culmen from base 21.1-24.9 (22.7) mm. 



