112 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



Geographic distrihut! 071.- — The hot, humid regions of southern Mex- 

 ico and Central America from Panama as far north as Orizaba; exact 

 limits of distribution not known. 



Character)^. — The largest known form of the genus (forearm, 42-44 

 mm.; skull about 23 mm.); skull large and massive, with high, broad 

 brain case, and heavy teeth; ear, nose leaf, and tragus high, thick, 

 and heavy. 



Pelage. — Fur dense, but short. Color more variable than in any of 

 the other forms of the genus. Some specimens from the lowlands of 

 the Rio Tesechoacan, in southern Vera Cruz, are bright ferruginous 

 in general appearance, the hairs being darker (near the mars brown 

 of Ridgway) on the basal third, the central band having the char- 

 acteristic color, and this in turn being minutely tipped with bright 

 chestnut. Other specimens from the same localit}' are much darker 

 in color. Skins from Tuxtepec, Oaxaca, have the proximal color band 

 buffy white, and this is concealed by about 4 mm. of bright hazel, 

 which gives the predominant tint to the fur when not disarranged. 

 Certain specimens from Costa Rica are still darker, having the basal 

 and outer bands of a sooty color near the clove brown of Ridgway, 

 while the central liand is grayish white. 



Membranes. — The membranes differ in no essential manner from 

 typical II. perspicillatwm,. 



Ear and tragus. —The ear is higher than in the t3^pical form, with 

 the anterior edge less convex and the tip less broadh'^ rounded. 

 Tragus slightly higher and broader. 



Nose leaf. — The nose leaf is wide and tapers more gradually to the 

 tip than in //. perspicillaturri. 



Skull and teeth. — Skull long and heavy, with a high, broadly arched 

 brain case, which slopes gradually to the elongated and broad rostrum; 

 palate broad; basal region of the skull massive; interorbital constric- 

 tion angular; z3'gomatic process of the maxillary heavy. Teeth large, 

 but the internal cusps of the molars relatively small; canines, premolars, 

 and middle incisors very heav}^; internal cusps of the first molar rounded 

 and less angular than in jf>t;/'s^?'c*7Z(2?!;M/z. 



Speclriiens examined. — Total number 177, from the following locali- 

 ties: 



Panama: Panama, 7; Boqueron, 6; Colon, 9. 



Costa Rica: Monte Redondo, 3; Juan Vinas, 2; San Sebastian, 2. 



Nicaragua: Escondido River, 50 miles from Bluefields, 12. 



Mexico: Apazote near Yohaltun, Campeche, 2; Jaltipan, 13; Rio 

 Tesechoacan, near Perez, Vera Cruz, 68; Buena Vista, 1; Tuxtepec, 

 Oaxaca, 51. 



Reinarh^. — '''' CaroUia astecuiir' was described bv Saussure from 

 "temperate and tropical Mexico." the principal character assigned to it 

 being a "lancef)late and pointed antitragus." This was doubtless due 



