﻿342 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loo 



and rastrojo on the left bank of the Cesar opposite the station "El 

 Orinoco." 



Specimens examined. — Ninety-two. Bonda, 13 (A.M.N.H., the 

 type; U.S.N.M., 3; C.N.H.M., 5; CM., 4); La Playa, Atlantico, 

 1 (A.M.N.H., type of hoylei); Ci^naga de Guajaro, 5 (U.S.N.M.); 

 Puerto Zapote, Bolivar, 3 (CM.); Jaraquiel, 1 (CM.); El Cauca, 

 Santander, 1 (CM.); El Salado, Sierra Nevada de Santa Marta, 

 1 (U.S.N. M.) ; Rio Guaimaral (including Aguas Verdes, Aguas Blancas, 

 Palmarito), 19 (U.S.N.M.); Rio Cesar (including El Orinoco, Guaca- 

 mayo, El Tunal), 16 (U.S.N.M.); Villanueva, 31 (U.S.N.M.); Sierra 

 Negra above Villanueva, Sierra de Perija, 1 (U.S.N.M.). 



SYLVILAGUS FLORIDANUS PURGATUS Thomas 



Sylvilagus purgatus Thomas, Ann. Mag. Nat. Hist., ser. 9, vol. 5, p. 32, 1920 

 vol. 20, p. 80, 1927 (vicinity of Bogotd). 



Holotype. — Adult female, skin and skull, B.M. No. 19.10.15.3 

 received in exchange from Frere ApoUinaris Maria. 



Type locality. — Purificaci6n, Rio Magdalena, Tolima, Colombia 

 altitude, 292 meters. 



Distribution. — Savannas and arid scrublands of the upper Rio 

 Magdalena Valley, departments of Cundinamarca and Tolima, 

 Colombia; altitudinal range approximately between 200 and 500 

 meters above sea level. 



Characters. — Smaller and paler throughout than superciliaris, ear 

 shorter, pelage shorter and thinner. Cranial characters as in super- 

 ciliaris but proportionately smaller. 



Measurements. — Means and extremes of six adults (five from 

 Nataigama and one from Ortega, both localities in the typical region): 

 Ear, dry from notch, 47.5 (41-53); condylobasal length, 66.3 (64.6- 

 69.0); zygomatic breadth, 33.9 (33.4-34.6); length of nasals, 32.9 

 (30.6-35.4); greatest combined width of nasals across premaxillary 

 sutures, 14.4 (12.3-15.7); least length of palatal bridge, 6.0 (5.5-6.7); 

 greatest distance between outer sides of maxillary plates of tooth rows, 

 21.6 (20.7-22.2); alveolar length of molar row, 13.7 (13.4-14.2). 



Remarks. — Skulls of the small purgatus resemble those of larger forms 

 of S. brasiliensis, notably the Colombian lowland tapiti and S. b. 

 apollinaris of the Andes near Bogota. However, cottontails are 

 always distinguished from tapitis by proportionately larger bullae 

 and longer nasals. 



Specimens examined. — Nine. The type (B.M.); Nataigama, Rio 

 Magdalena, Tolima, 7 (U.S.N.M.); Ortega, Rio Magdalena Valley, 

 west of Purificacion, Tolima, 1 (U.S.N. M.). 



SYLVILAGUS FLORIDANUS NIGRONUCHALIS (Hartert) 



Lepus nigronuchalis Hartert, Nov. Zool., vol. 1, p. 40, 1894. 

 Sylvilagus (Sylvilagus) nigronuchalis, Lyon, Smithsonian Misc. Coll., vol. 45, 

 p. 336, 1904. 



