502 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



The single specimen obtained was sent to Dr. John T. Zimmer for 

 identification, as no material of viridicordatus was available to us. 

 He informs us that it is a somewhat immatm'e male of viridicordatus, 

 and agrees with adult males in his series except that the tail is bluer, 

 less purplish, a difference that may be due to immaturity. 



The crop of the bird contained 15 hemiptera, 3 gall wasps, 5 aphids, 

 and 1 tiny spider. 



Polytmus guainumbi guainunibi (Pallas) 



Trochilus guainumbi Pallas, in Vroeg, Catalogue . . ., Adumbr., 1764, p. 2 

 (Cape of Good Hope, error = Surinam, cf. Richmond, Smithsonian Misc. 

 Coll., vol. 47, 1905, p. 344). 

 1 cf , Cantaura, March 7, 1952; gonads small; iris dark. 



At Cantam-a and Caicara this low-flying hummingbu'd was typically 

 encountered on the open savanna and in extensive clearings in the 

 edge habitat, wherever the ground cover was composed of low grasses 

 and other herbaceous plants. It was a rapid feeder, rarely remaining 

 more than a brief moment at any one place, rapidly fljdng long dis- 

 tances (50 to 100 feet) between feeding stops. It was uncommon, or 

 at least rarely recorded ; perhaps, since it flew so close to the ground, 

 it was often simply overlooked by the collector. 



Leucippiis fallax richtnondi Cory 



Leucippus fallax richmondi Cory, Field Mus. Nat. Hist., Publ. Orn. Ser., vol. 



1, 1915, p. 303 (new name for Leucippus pallida (Richmond) 1895, not of 



Taczanowski, 1874; Margarita Island) . 

 1 unsexed, Barcelona, January 26, 1952; maxilla and tip of mandible black, 

 rest of mandible pale red; feet black; iris dark. 



This specimen, taken within a hundred yards of the seacoast, is 

 unusually dark. It v»^as kindly identified for us by Dr. Zimmer, who 

 compared it with numerous examples of richmondi from the Cumand 

 region. It is more deeply colored than were the Cumana birds, but 

 not enough so to match occidentalis, and even more decidedly different 

 h'om fallax, which occurs between the other two races. It is therefore 

 best referred to richmondi. 



Atnazilia chionopectus chionopectus (Gould) 



Thaumalias chionopectus Gould, Monograph of the Trochilidae, pt. 18, September 

 1859, p. [8] and text [ = 5, pi. 293 of volume] (Trinidad). 

 1 9, Caicara, June 6, 1950; gonads enlarged, brood patch evident; iris dark; 

 bill and feet black. 



This little white-bellied hummingbird was common at times at 

 Caicara, although only recorded in June, October, and November, 

 probably having been overlooked in other months. The caU is not 

 at all that which one would expect of a tiny hummer; it was a rather 

 loud diddle-ee, diddlee, diddle-ee, rather like that of Euscarthmus 



