226 BULLETIN 133, UNITED STATES NATIONAL MUSEUM 



<;ulmen lined faintly with fuscous; margins of eyelids around eye 

 Isabella color; iris carob brown; toes as in male. 



In Guarani this species was known as su ru cu cih^ in Anguete as 

 tsa lakh. 



TROGONURUS SURRUCURA (Vieillot) 



Troffon surructira Vieillot, Nouv. Diet. Hist. Nat., vol. 8, 1817, p. 321. 

 ( Paraguay. ) 



An adult female taken at Las Palmas, Chaco, on July 21, 1920, 

 was found at rest on an open limb in rather open forest near a 

 stream. It perched with tail hanging straight down and at intervals 

 uttered a low plicl\ 



The sides of the bill were court gray ; base of maxilla dark neutral 

 gray; gonys light celandine green; iris light seal brown; lower end 

 of tarsus and toes dark neutral gray, with scales outlined in grayish 

 white; underside of toes yellowish. 



This specimen has the following measurements: Wing, 134; tail, 

 149.5 ; exposed culmen, 15.2 ; tarsus, 12.6 nun. 



Family TROCHILIDAE 



LEUCIPPUS CHIONOGASTER (Tschudi) 



TrocJiilus chionoyaster Tschudi, Fauna Peruana, Orn., 1845-184G, p. 247, 

 pi. 22, fig. 2. (Peru.) 



Two immature males secured at Tapia, Tucuman, on April 12 and 

 13, 1921, agree with descriptions of the present species save that in 

 one there are a few tiny, light-vinaceous cinnamon feathers between 

 the mandibular rami and that in the other a few flecks of the same 

 color occur on the throat and sides of the throat. Both of these 

 specimens are obviously only recently grown and are in molt on the 

 foreneck. It is suggested that the brownish color described is a 

 Juvenal plumage that is entirely lost in the adult. These specimens 

 should perhaps bear the subspecific name longirostris of Schliiter,^* 

 but in the absence of comparable material this is not certain. 

 Schliiter states that his form has the following measurements: 

 Wing, 60; culmen, 25-27 mm. In my specimens the wing measures 

 54.8 and 55 mm. and the culmen 23 and 23.6 mm. (It must be borne 

 in mind that these are evidently immature birds.) Simon ^^ places 

 the more southern birds under the subspecific name hypoleucus of 

 Gould.''" Gould gives the length of bill in his type as 28 mm., 

 while Simon records from 23 to 25 mm. only for specimens that he 

 considers hypoleucus. As a further complication, INIr. Ridgway'"^ 

 considers the generic name Leucippus Bonaparte, type Trochilus 



^ Leucippus Iriicor/aster loncjlrostris SchUiter, Falco, 1913, p. 42. (Province of Salta.) 



"5 Hist. Nat. Troch., 1921, p. 103. 



^Trochilus hypoleucus Gould, Proc. Zool. Soc. London, 1846, p. 90. (Bolivia.) 



"^ Birds Nortli Middle America, vol. 5, 1911, p. 305. 



