450 PROCEEDINGS OF THE NATIONAL MUSEUM voi.. 99 



of another female, in alcohol, 63.7; third metacarpal, (56.0), 51.4-55.9; 

 greatest length of skull, to front of incisor, (24.2), 23.4-24.9; zygomatic 

 breadth, (12.2), 11.7-12.6; mastoid width, (12.4), 11.9-13.0; interor- 

 bital constriction, (5.4), 5.3-5.8 ; height of brain case, from basisphenoid, 

 (11.4), 11.1-11.9; upper tooth row, (5.7), 5.3-6.1. 



Remarks. — The males are appreciably smaller than the females of 

 comparable ages. 



DIPHYLLA ECAUDATA Spix 



Diphylla ecaudata Spix, Simiarum et vespertilionum Brasiliensium species novae, 

 p. 68, pi. 36, fig. 7, 1823.— Allen, Bull. Amer. Mus. Nat. Hist., vol. 13, p. 87, 

 1900 (Cacagualito). 



Type locality. — Brazil. 



THYROPTERA TRICOLOR ALBIGULA G. M. Allen 



TkyroTpiera tricolor, Allen, Bull. Amer. Mus. Nat. Hist., vol. 13, p. 94, 1900 



(Cacagualito). 

 Thyroptera tricolor alhigula G. M. Allen, Proc. New England Zool. Club, vol. 9, 



p. 1, 1923. 

 Thyroptera albiventer, G. M. Allen and Barbour, Bull. Mus. Comp. Zool., 



vol. 65, p. 271, 1923 (Rfo Jesusito, eastern Panamd). — G. M. Allen, Proc. 



New England Zool. Club, vol. 9, p. 2, 1923 (albiventer distinct from tricolor!). — 



Dunn, Journ. Mamm., vol. 12, p. 429, 1931 (Barro Colorado Island, Canal 



Zone, Panamd). 

 Thyroptera tricolor albiventer, Dunn (nee Tomes), Journ. Mamm., vol. 12, 



p. 430, 1931 (Gutierrez, the type specimens of albigula; name lapsus calami 



for Thyroptera tricolor albigula Allen). 



Type locality. — Gutierrez, in the mountains about 25 miles inland 

 from Chiriquito, on the trail from the Chiriqui Lagoon to Boquete, 

 western Panama ; altitude, approximately 4,000 feet. 



Specimens collected. — Eighteen. Colonia Agricola de Caracolicito, 

 southern slope of the Sierra Nevada de Santa Marta, 7 males (2 in 

 alcohol) , 1 1 females (5 in alcohol) . 



Measurements. — Head and body, 39-49; tail, 29-31 (of 7 specimens 

 in alcohol, 24-30; free portion of tail 4-8, or 15-28 percent of total 

 length); hind foot, 6-7; ear, 12-13; forearm, 34.3-37.7; greatest 

 length of skull, 14.4-15.1; condylobasal length, 13.4-14.0; zygomatic 

 breadth, 7.1-7.6; width of brain case, 7.2-7.4; depth of brain case, 

 including bullae and cochleae, 6.5-7.0; width of rostrum, 4.0-4.3; 

 interorbital constriction, 2.6-2.9; maxillary tooth row, 5.6-6.0. 



Bemarks. — Individual variation in color of underparts and in other 

 characters in the large series from northern Colombia, as well as from 

 other regions, shows that specific distinction of Hyovycteris albiventer 

 Tomes (Proc. Zool. Soc. London, 1850, p. 179) from Thyroptera 

 tricolor Spix (Simiarum et Vespert. Brasil., p. 61, 1823) cannot be 

 maintained as advocated by G. M. Allen (Bull. Mus. Comp. Zool., 

 vol. 52, p. 42, 1908) and Cabrera (Trab. Mus. Nac. Cienc. Nat., 



