180 VESPERTILIONIDiE. 



c, d'. c? ad., al. M. Lidth de Jeude. 



e'. ad. sk. Haslar Hospital. 



/'. ad. sk. 



y'-k'. (5 & $ , al. No history. 



I'- skull. Darmsdorf. Dr. Giintlier [P.]. 



m'. skull. M. Lidth de Jeude. 



«'. skull. 



o'. skull. No history. 



p'. skeleton. Switzerland. 



q'. skeleton. No history. 



Subgenus II. Corinoehinus. 



Nostrils in front of narrow grooves concealed by the greatly enlarged 

 glandular prominences arising from the sides of the muzzle. ' {Nearctic 

 Het/ion.) 



2. Plecotus macrotis. 



Plecotus macrotis, Lecmte, Cuvier, Anim. Kingd. {M'Murtrie ed.), 



App. p. 431 (1831). 

 Plecotus lecontii et townsendi, Cooper, Ann. Lye. New Yoi-h, 1837, 



pp. 72, 73. , F , J . , 



Synotus macrotis et townsendi, Allen, Monoqr. Bats N. America, p. 63 



(1864). 

 CorLnorhinus macrotis et townsendi, Alkti, Proc. Acad. Nat. Sci. 



Philad. 1865, p. 173. 



Ears very long, about three fourths the length of the forearm, 

 conjoined at the bases only, more narrowed towards the tip than in 

 PI, avritus, and rather shortly rounded off; above the base of the 

 inner margin a slight blunt projection, or rather convexity, repre- 

 sents the position of the well-defined projecting lobe in that 

 species ; the outer margin is faintly concave in the upper one fifth 

 beneath the tip, then gradually convex, again broadly and slightly 

 concave opposite the lower third of the tragus, ending in a convex 

 lobe behind the angle of the mouth, from whioh'it is separated by 

 a very distinct wart ; tragus long, rather narrow, and subacntely 

 pointed. 



The glandular prominences between the nostrils and eyes are 

 greatly developed in a vertical direction, and curve inwards over the 

 grooves on the face behind the nasal apertures, so as to cover them 

 and meet together above the muzzle (Plate XI. fig. 8) ; the nasal 

 apertures are fringed with a narrow horizontal membrane of a paler 

 colour than the surrounding integument. The depth of the upper 

 lip is much greater in front than in Plecotus auritiis, and more 

 resembles that in Synotus barhastellus. 



Wings to the metatarsus close to the base of the toes ; calcaneum 

 weak, termination not defined, the extreme tip of the tail alone pro- 

 jecting ; feet slender, no prominent callous tubercle near the ankle 

 on the sole. The antebrachial membrane much less broad than in 

 PI. auritiis, but its anterior margin is free throughout. 



The fur of the head does not extend in front of the ears, and the 

 face is nearly naked, except along the upper lip ; the ear-conch has 

 a fringe of fine hairs on the inner margin. Above, the wing-memi- 



