644 CHILONYCTERIS. DERMONOTUS. 



609. mexicana (Chilonycteris), Miller, Proc. Acad. Nat. Scien. Phila., 



1902, p. 401. 

 MEXICAN BAT. 



Type locality. San Bias, Territorio de Tepic, Mexico. 



Geogr. Distr. Central and southern Mexico from State of Durango 

 through Province of Tepic on the west, and States of Jalisco, Colima, 

 and Morelos, to State of Oaxaca in the south. 



Genl. Char. Similar to C. rubiginosa, but smaller in size and 

 paler in color. 



Color. Two phases. Upper surface dark broccoli brown; under 

 parts pale wood brown; ears and membranes dark brown. This is 

 the brown phase. ' The yellow phase has the entire head and body 

 tawny ochraceous, with the hairs on belly dull brown at base. 



Measurements. Total length, 82; tail, 20; forearm, 54; thumb, 7; 

 second finger, 45; third finger, 90; fourth finger, 71; fifth finger, 67; 

 tibia, 19.4; foot, n.6; ear from meatus, 21. Skull: greatest length, 

 20; basal length, 19; basilar length, 17; interorbital constriction, 4.4; 

 lachrymal breadth, 7.8; zygomatic width, n.8; length of mandible, 

 15; upper tooth row, without incisors, 9; lower tooth row without 

 incisors, 9.4. 



138. Dermoiiotus. 



T 4-4 . p l-l . p 2-2 . M 3 3 _ 

 l -F5' U i=i' F '3=3' M 'F3- 42 ' 



Dermonotus Gill, Proc. Biol. Soc. Wash., xiv, 1901, p. 177. Type 



Pteronotus davyi Gray. 

 Pteronotus Gray, Mag. Zool. Bot., n, 1838, p. 500. (nee Rafin.) 



Wings from the spine ; otherwise like Chilonycteris . 



610. davyi (Pteronotus), Gray, Mag. Zool. Bot., n, 1838, p. 500. 

 DAVY'S BAT. 



Type locality. Island of Trinidad. 



Geogr. Distr. Islands of Dominica and Trinidad, south to Brazil. 



Genl. Char. Back behind shoulders .naked; wings from the middle 

 of the tibia and from the calcanea ; outer side of ear with obtuse notch ; 

 obtuse process from front of muzzle on each side. 



Color. Two phases; one reddish brown, the other fulvous chest- 

 nut. 



Measurements. Total length, 76.2 ; tail, 25.8 ; forearm, 47 ; thumb, 

 6.3; third finger, metacarpal, 42; fourth finger, metacarpal, 35.5; 



