602 RHOG&ESSA. 



TRES MARIAS BAT. 



Type locality. Tres Marias Islands, State of Jalisco, Mexico. 



Geogr. Distr. Tres Marias Islands, State of Jalisco, through 

 Mexico to Costa Rica, Central America. 



Genl. Char. Wart above eye and another beneath chin; mem- 

 branes naked except a small furry patch on basal fourth of inter- 

 femoral membrane. 



Color. Chestnut brown above, base of fur grayish brown ; beneath 

 grayish fawn. 



Measurements. Total length, 65.5; tail vertebrae, 29.5; foot, 5.3; 

 forearm, 27.4; thumb, 4.1; longest finger, 48.5; tragus, 6.4. 



566. gracilis (Rhogoessa), Miller, N. Am. Faun., No. 13, 1897, p. 126. 

 GRACEFUL BAT. 



Type locality. Piaxtla, State of Puebla, Mexico. 



Geogr. Distr. State of Puebla, Isthmus of Tehuantepec, Mexico. 



Genl. Char. Ears extending beyond tip of nose; feet and legs 

 long, slender; calcar slender; free border of uropatagium naked; 

 wings from base of toes. 



Color. Above chestnut; beneath paler. 



Measurements. Total length, 77-82; tail vertebras, 37-41; foot, 

 5-6; forearm, 30-33; thumb, 4; longest finger, 58-61; ear, 16-17; 

 tragus, 9-10. 



567. alleni (Rhogoessa}, Thomas, Ann. Mag. Nat. Hist., 6th Ser., x, 



1892, p. 477. 

 SANTA ROSALIA BAT. 



Type locality. Santa Rosalia, near Autlin, State of Jalisco, 

 Mexico. 



Geogr. Distr. Known from type locality only. 



Genl. Char. "Larger than R. parvula; ears reaching beyond nos- 

 trils; inner margin convex forward below, straight or slightly con- 

 cave above; tragus long, inner edge straight, outer slightly convex, 

 edge indistinctly crenulate; lobule at base of outer margin." 



Color. No description of color given; alcoholic specimen. 



Measurements. Tail vertebrae, 41; foot, 7.1; forearm, 35; thumb, 

 5; tragus, 7. "Skull: occiput to gnathion, 14.7; greatest breadth, 

 9.5 ; front of canine to back of third molar, 5.4." (Thomas, 1. c.) 



Resembling the genus Plecotus of the Old World, the next genus 

 CORYNORHINUS, however, is distinguished for the conspicuous club- 

 like glandular prominences possessed by its members on the sides of 

 the muzzle and which nearlv meet in the center behind the nostril. 



