178 VESPERTILIONID^. 



nent rounded projection directed inwards above the base ; tragus 

 very large, tapering upwards, with a lobe at the base of its outer 

 margin, rounded, and placed half horizontallJ^ 



r> tu- T 2—2 1—1 „ 2—2 3—3 



Dentition, inc. -— , c. j^, pm. ^^, m. g^g. 



SkuU considerably vaulted ; bones forming the brain-case very 

 thin ; occipital and sagittal crests scarcely developed. 

 Range. Palasarctic and Nearctic Eegions. 



Subgenus I. Plecottjs. 



Nostrils in front of naked semilunate grooves on the upper surface of 

 the muzzle. (Palcearciic Region.) 



1. Plecotus auritus. 



Vespertilio auritus, Z. Si/st. Nat. xii. p. 47 ; Schreb. Sdugeth. (1775), 



p. 163, pi. 50; Geqfroy, Ann. du Mus. viii. p. 197 (1806); Des- 



marest, Mammaloffie, p. 144 (1820). 

 Vespertilio otus, Boie, Isis, 1825, p. 1206. 

 Vespertilio cornutus, Faber, Isis, 1826, p. 515. 

 Vespertilio brevimanus, Jem/ns, Trans. Linn. Soc. xvi. p. 55 (1828). 

 Plecotus auritus, Geoffrm/, l)escript. de VEyypte, p. 118 (1812) ; Keys. 



8f Bias. Wiegm. Archiv, 1839, p. 806 ; Blasius, Fauna Deiitschl. 



p. 39 (woodcut), pp. 37-41 (1857) ; Kinahan, Proc. Nat.-Hist. Soc. 



jDublin, ii. p. 164 (1859) ; Dobson, Monoqr. Asiat. Chiropt. p. 84 



(1876). 

 Plecotus fegyptiacus, Is. Geoff. GuirhUs Mag. Zool. 

 Plecotus peronii. Is. Geoff. I. c. 



Plecotus christii. Gray, Mag. Zool. ^- Bot. ii. p. 495 (1838). 

 Plecotus bonapartii. Gray, I. o. 

 Plecotus homochrous, Hodgson, Ann. ^- Mag. Nat. Hist. 1855, xvi. 



p. 103. 



Head slightly raised above the face-line. Ears very large, nearly 

 as long as the forearm, conjoined by a low band across the forehead 

 at the bases of their inner margins, regularly oval and rounded 

 above, no emargination or concavity in upjier third of the outer 

 margin ; the outer margin terminates behind the angle of the 

 mouth, from which it is separated by a small wart ; the inner 

 margin develops, at a short distance above the base, a rounded pro- 

 minent lobe directed inwards towards and almost touching its fellow 

 of the opposite side ; tragus very long and subacutely pointed, inner 

 margin slightly convex, outer correspondingly concave in upper, 

 convex in lower half, with a rounded lobule slightly above the base, 

 directed downwards and outwards. A large wart above the eye. 

 The nostrils at the anterior extremities of deep well-defined lunate 

 depressions margined by raised rounded edges (Plate XI. fig. 9). 



Wings from the base of the toes ; antebrachial membrane wide, 

 anterior margin free throughout; feet slender, calcaneum extending 

 less than half the distance between the foot and end of the tail ; 

 no postcalcaneal lobe ; the last osseous caudal vertebra generally 

 quite free. 



