402 PROCEEDINGS OF THE ACADEMY OF [May, 



San Bias, Tepic, :Mexicn, June 9, 1897, by E. W. Xelson and E. 

 A. Goldman. Original number, 11,132. 



Characters. — Similar to Chilonyderis rublginosa, but .-^ize smaller 

 and color (in brown phase) much less dark. 



Color. — Brown phase, represented by the type : Dorsal surface a 

 uniform brown, most closely resembling the broccoli-brown of Ridg- 

 way, but darker and with a mixture of both hair-brown and drab. 

 The individual hairs are nearly uniform throughout their length, 

 though the bases are faintly darker and the tips lighter. Under 

 parts wood-brown, much lighter thau Ridgway's Plate III, fig. 19, 

 the hairs distinctly dark slaly-brown at base. Ears and membranes 

 brown, somewhat darker than body. 



Yellow phase : Entire body and head tawny-ochraceous, the hairs 

 of the upper parts uniform, those of the belly dull brown at base. 



Skull and Teeth. — Except for their smaller size, the skull and 

 teeth do not differ appreciably from those of Chilotiycteris rublgi- 

 nosa. 



Measurements. — External measurements of type: Total length, 

 82; tail, 20; tibia, 19.4; foot, U.Q (10); forearm, 5-1; thumb, 

 7; second finger, 45; third finger, 90; fom-th finger, 71; fifth 

 finger, 67 ; ear from meatus, 21. 



Cranial measurements of type: Greatest length, 20 (22) ;" basal 

 length, 19 ( — ); basilar length, 17 (19); interorbital constriction, 

 4.4 (4.4); lachrymal breadth, 7.8 (8.6); zygomatic breadth, 11.8 

 (13); mandible, 15 (17); maxillary toothrow (exclusive of in- 

 cisors), 9 (10); mandibular toothrow (exclusive of incisors), 

 9.4(11). 



Specimens Examined. — Ninety -four (9 skins), from the following 

 localities in Mexico : Colima — Hacienda Magdalena, near City of 

 Colima, 14; Durango— Chacala, 8; Jalisco- -Ameca, 5, Bolanos, 

 4(1 skin), near Ometepec, 3; Morelos (exact locality not known), 

 4; Oaxaca — Huilotepec, 1 (skin); Tepic — San Bias, 55 (7 skins). 



Remarks. — The large Chilonyderis ni 6 igf in osa is represented in 

 the National Maseum collection by three specimens, one from 

 Chontales, Nicaragua, and two from the island of Trinidad. They 

 agree very closely in size, forearm 61-62 mm., and are not ap- 

 l)roached by any of the ninety-four specimens of C. me.vicana. 

 They are also much darker in color. 



" Measurements in parentheses are those of an adult Chilotiycteris 

 rubiginosa from Chontales, Nicaragua (No. 37,515). 



