FAMILY TROCHILIDAE 33 1 



some with sides slightly marked with cinnamon ; average size, slightly 

 smaller. 



Measurements. — Males (10 from the Canal Zone, and the eastern 

 sectors of the Provinces of Colon and Panama), wing 51.0-53.8 

 (52.3), tail 27.4-29.4 (28.5), oilmen from base 18.2-20.2 (19.6) mm. 



Females (9 from the Canal Zone and the eastern sector of the 

 Province of Panama), wing 49.7-51.7 (50.3), tail 26.8-28.4 (27.5), 

 culmen from base 18.0-21.4 (19.4) mm. 



Weight (Hartman, Joe. cit., p. 468), 2 females, 4.0, 4.3 grams. 



A male, collected at the La Jagua Hunting Club, March 23, 1961, 

 had the iris dark brown; maxilla and tip of mandible black; rest of 

 mandible dull pinkish white ; lower end of tarsus and toes fuscous- 

 black ; claws black. 



Resident. Locally common on the Pacific slope from the western 

 boundary of the Canal Zone and adjacent western Province of 

 Panama (La Chorrera) east to the Tuira Valley (Boca de Cupe, 

 Capeti), Darien; on the Caribbean slope from the lower Chagres 

 Valley east to Portobelo, Colon. 



There is variation in the extent and brightness of the coppery 

 bronze color of the back throughout the range, but this is not cor- 

 related with distribution so as to allow recognition of two races 

 in the geographic area concerned. 



In view of the several subspecies now accepted in Panama it 

 is desirable to establish a definite type locality for the nominate 

 race other than the "isthme de Panama" of the original description. 

 As the first specimens, listed as collected by Ad. De Lattre in his 

 tropical travels, cover this typical race, it may be assumed that they 

 were taken near Panama City, which place, therefore, is designated 

 as the restricted locality. A recent record for this area is of a male 

 collected by Storrs Olson on February 1, 1963, about 3 kilometers east 

 of Albrook Field. 



The bird was named for Edward Wilson of London, a brother of 

 Thomas Wilson, benefactor and President of the Academy of Natural 

 Sciences in Philadelphia, in recognition of his collection of humming- 

 birds and of his interest in the family. 



This subspecies is found on the Caribbean slope in the lower 

 Chagres Valley, where McLeannan collected it, and where Salvin 

 secured it near Obispo in April 1873. It has been collected from 

 Gamboa to Juan Mina according to specimens at hand, and is re- 

 corded from Barro Colorado Island. A number are at hand from 

 Gatun, and Goldman secured 1 at Portobelo, Colon, May 30, 1911. 



