﻿358 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loa 



Measurements. — Of foiir adult male topotypes, respectively: Ear, 

 dry from notch,-, 50, 55, 51; condylobasal length, 62.2, 62.2, 64.3, 

 65.0; zygomatic breadth, 33.8, 33.3, 34.4, 33.6; length of nasals, 26.6, 

 -, 27.3, 29.6; greatest combined width of nasals at premaxillary 

 sutm-es, 13.2, 12.1, 14.0, 11.6; postorbital constriction, 11.5, 12.2, 

 11.4, 11.5; incisive foramina, 17.8, 18.3, 18.0; least length of palatal 

 bridge, 5.6, 6.5, 6.5, 6.1; distance between outer sides of maxillary 

 plates of tooth rows, 21.4, 20.1, 21.8, 21.2; alveolar length of molar 

 row, 13.8, 13.6, 13.5, 13.9. 



Remarks. — The tapiti of the Paramo de Tama recorded by Osgood 

 was seen but not taken. A skull only of a tapiti from the Paramo de 

 Guerrero, Santander differs widely from skulls of topotypes of 

 meridensis. Pedicel of its supraoccipital process is extremely narrow 

 anteroposteriorly, the posterior angle extremely delicate and widely 

 separated from frontal; palatal bridge unusually long as result of 

 ossification of posterior borders of incisive foramina. 



Specimens examined. — Ten. Sierra de Merida, Venezuela, the type 

 (B.M.); La Culata and Sierra Nevada, 8 (6, U.S.N.M.; 2, C.N.H.M.), 

 Paramo de Guerrero, Santander, Colombia, 1 (CM.). 



SYLVILAGUS BRASILIENSIS CHOTANUS Hershkovitz 



Sylvilagus andirius chotanus Hershkovitz, Occ. Papers Univ. Michigan Mus. 

 ZooL, No. 393, p. 8, 1938. 



Holotype.— Adult female, skin and skull, U.M.M. Z. No. 77061; col- 

 lected July 18, 1934, by PhiHp Hershkovitz; original number, M268. 



Type locality. — Rio Chota Valley, below Pimanpiro, Imbabm-a 

 Province, Ecuador; altitude, approximately 1,500 meters. 



Distribution.— Arid valley of the Rio Chota, upper Rio Mira, north 

 of Ibarra, Imbabura Province, Ecuador. 



Characters. — Paler throughout than andinus, underparts with more 

 wliite, pelage shorter and thinner. 



Remarks. — S. b. chotanus intergrades with andinus at higher alti- 

 tudes. The arid habitat of chotanus is not far from the humid tropical 

 forest lower down the same valley (Rio Mira), where surdaster occm*s. 

 Nevertheless, chotanus differs most from that dark race. 



Specimens examined. — Four. The type and three paratopotypes 

 (U.M.M.Z.). 



t SYLVILAGUS BRASILIENSIS ANDINUS (Thomas) 



Lepus andinus Thomas, Ann. Mag. Nat. Hist., ser. 6, vol. 20, p. 551, 1897. — 

 Allen, Bull. Amer. Mus. Nat. Hist., vol. 25, p. 117, 1916 (Quito; Mount 

 Pichincha) , 



Sylvilagus andinus, Thomas, Ann. Mag. Nat. Hist., ser. 8, vol. 11, p. 212, 1913 

 (Cayambe; Guaillabamba near Riobamba; pdramos east of Riobamba; 

 Telagua, Bolfvar).— Lonnberg, Ark. Zool., vol. 8, p. 33, 1913 (Nono, 

 Pichincha); vol. 14, pp. 3, 53, 1921 (western Ecuador).— Stone, Proc. 



