PIPISTRELLUS 



221 



Pipistrellus savii. 

 Nat. size. 



conspicuous, a peculiar dull brownish ochraceous-bufi'; adult female : 

 light tips as conspicuous as in last, dull brownish cream-buff. 



SJciill. — The skull is slightly larger than that of PtjnstreJhtyi 

 nathusii and P. kuhlii, and is immediately distinguishable among 

 the European species by the flatness of dorsal surface of rostrum, 

 prominence of ridge along edge of orbit, and 

 relatively small size of narial emargination, 

 characters the first two of which suggest 

 Verpertilio murinus. Dorsal profile of skull as 

 in P. pipistrellus and P. Tcnhlii, but brain-case 

 slightly more depressed. Breadth of brain-case 

 about half greatest length of skull. Rostrum 

 relatively broader than in the other European 

 species, its dorsal surface more flattened and 

 orbital ridges more prominent ; narial emar- 

 gination scarcely larger than in P. pipistrellus. 

 Mesopterygoid space about as wide as long, its 

 general outline, aside from the notch caused 

 by median spine of palate, broadly barrel shape, 

 the hamulars distinctly turned inward. Mandible with coronoid 

 process and upper border of posterior portion as in P. hihlii, 

 but with angular process less curved and relatively longer than 

 in the other European species. 



Teeth. — Incisors both above and below essentially as in 

 Pipistrellus pipnstrellus, except that inner upper tooth has the 

 secondary cusp somewhat better developed. 

 Canines with no special peculiarities, not 

 essentially different from those of P. pipi- 

 strellus. Anterior upper premolar very 

 minute, sometimes hidden in the gum or 

 occasionally absent, its crown area never 

 much more one-sixth that of outer incisor ; 

 large premolar always strongly in contact 

 with canine, its form peculiar in the absence 

 or slight development of the antero-internal 

 cusp. Lower premolars strongly contrasted 

 in size, the crown area of first decidedly less than half that 

 of second, its cusp relatively lower and less developed than in 

 any of the other European species. Molars both above and 

 below with no special peculiarities. 



Measurements. — Two adult males from Palermo, Sicily : head 

 and body, 43 and 47 ; tail, 34 and 35 ; tibia, 12-6 and 12-8 ; 

 foot, 6"4 and 7; forearm, 31 and 32- 6; thumb, 5 and 5-6; 

 third finger, 54 and 56 ; fifth finger, 42 and 41 ; ear from meatus, 

 12*4 and 12-6; width of ear, 12 and 12. Two adult females 

 from the same locality : head and body, 46 and 47 ; tail, 35 and 

 39 ; tibia, 13 and 13*4 ; foot, 6*6 and 7 ; forearm, 33 and 33 ; 

 thumb, 5 and 5 • 4 ; third finger, 56 and 57 ; fifth finger, 42 and 

 43 ; ear from meatus, 12*4 and 13 ; width of ear, 12 and 11 •6. 



^ 



C2» 



Fia. 39. 



Pipistrellus savii. 

 Anterior teetli. X 5. 



