236 



CHIEOPTBRA 



noteworthy peculiarities, its general outline less narrow than in 

 the related species. 



Teeth. — Inner upper incisor as in Eptesicus serotinus, but more 

 robust in proportion to its height ; outer incisor noticeably higher 

 than in the related species, its apex reaching level of secondary 

 cusp of larger tooth, its secondary cusp more prominent ; no 

 marked contrast between crown areas of the two teeth; each 

 pair in line of general curve of anterior portion of palate, instead 

 of at right angles to main axis. Lower incisors less crowded 

 than those of E. serotinus, their imbrication distinct but not 

 unusual, the general outline of the row broadly V-shaped ; in form 

 the individual teeth show no special peculiarities ; i 2 without 

 postero-internal tubercle. Canines and premolars with no special 

 peculiarities. First and second upper molars essentially as in 

 Eptesicus serotinus, but disproportion between paracone and 

 metacone less evident ; m 3 with crown area about two-thirds that 

 of m l , its longitudinal diameter through metacone slightly more 

 than half transverse diameter, the mesostyle and metacone well 

 developed, the second and third commissures more than half as 

 long as first ; lower molars like those of E. serotinus in form, but 

 angles in commissures between outer and inner cusps deeper ; 

 area of second V in ™3 nearly equal to that of first. 



Measurements. — Adult male from Grotte de Vallorbe, Vaud, 

 Switzerland: head and body, 68 • 5 ; tail, 47; tibia, 17; foot, 10; 

 forearm, 38 ■ 2 ; thumb, 9 • 8 ; third finger, 68 ; fifth finger, 49. 

 Forearm in adult male from Upsala, Sweden, 38 ■ 4. Three 

 females from the same locality: forearm, 39, 39, and 39 - 6; 

 third finger in the four specimens from Upsala : 66, 68, 70 and 

 68. For cranial measurements see Table opposite. 



Specimens examined. — Fifteen, from the following localities : — 



Norway : No exact locality, 1. 



Sweden: Upsala, 8 (B.M. and U.S.N.M.); Upland, 2 (U.S.N.M.). 



Germany : Wernigerode, Saxony, 2. 



Austeia-Hungaby : Csall6k6z-Somorja, Pressburg, 1. 



Switzerland : Grotte de Vallorbe, Vaud, 1 (Mottaz). 



Remarks. — This species is readily distinguishable from Eptesicus 

 serotinus by its smaller size and by the conspicuous pale tips to 

 the hairs of back. From Vesperiilio murinus, which resembles it 

 in colour pattern, the narrow ear, more yellowish (less whitish) 

 hair-tips on back, and slightly smaller size distinguish it super- 

 ficially. Pipistrellus savii, which often has almost exactly similar 

 coloration, is a much smaller animal (forearm, 31 to 33 instead 

 of 38 to 40). 



1. Norway. (Collett.) E. B. Alston (p.) 81. 6. 9. 2. 



4?. Upsala, Sweden. (Eolthoff.) Lord Lilford (p). 11.1.1.39-42. 



6, 9. Wernigerode, Saxony, Ger- Dr. W. Wolterstorfl 0. 2. 8. 3-4. 

 many. (c & p). 



1, Csall6koz-Somorja, Press- Budapest Museum (e.) 94.3.1.14. 

 burg, Hungary. 



