TTTE LARCIE BROWN ]?AT. 



633 



are strong and the teeth large. Cranial measurements of an adult 

 male are as follows: Greatest length of skull, 20 mm. (13/16 in.) ; 

 length of palate, 9 mm. (6/16 in.) ; maxillary tooth row, 9 mm. 

 (6/16 in.) ; greatest width of braincase, 10 mm. (7/16 in.) ; depth 

 of braincase over bulla, 8 mm. (5/16 in.). 



Range. — North America, from Mexico to the colder regions of 

 Canada. In Indiana it doubtless occurs all over the State, although 

 it has been reported only from Vigo, Lawrence and Monroe coun- 

 ties in the southwestern part. It is not abundant in the caves of 

 southern Indiana, but individuals are seen not infrequently. 



Hahits. — This bat lives well in captivity, and will eat any kind 

 of meat. It goes to a dish for food or picks it up from the floor 

 more readily than any of the smaller species. Its large teeth and 

 powerful jaws would seem to fit it for a carnivorous diet, but there 

 is no evidence that it feeds on anything except insects. 



The large brown bat is, perhaps, less truly a cave dweller than 

 the species of Myotis found in this region. Among some thousands 

 of the latter which the writer has observed in Indiana and Ken- 

 tucky caves, only ten of this species were found. It is frequently 

 seen flying in summer and the figures above, probably do not rep- 

 resent the correct proportion of the species in our fauna. All of 

 the ten individuals collected were near the entrances of the cave 

 where daylight reaches. It would seem, therefore, that many indi- 

 viduals migrate in winter. In common with other bats, they live 

 in trees and buildings in summer and resort to caves rarely, if at 

 all. Witmer Stone says of it: ''About Philadelphia this is our 

 commonest species. The large brown bat is always distinguished 

 on account of its size, which, in the uncertain twilight, is often 

 exaggerated. * * * It is seen late in autumn and on mild even- 

 ings in midwinter, and not infrequently enters houses during the 

 latter season." 



Genus Lasiurus Gray. 



Lasiurus Gray, Zoological Miscellany, No. 1, p. 38, 1831. 



Dental formula.— 1, C, ^J; Pm, |Ei; M, - 32. 



Generic characters. — Size medium or large ; ear and tragus very 

 short, blunt and broad, the latter bent forward, the former furred 

 over most of its outer surface; interfemoral membrane densely 

 furred over all its upper surface. The skull is broad, short and 

 deep, the rostrum being broader than long. The single upper in- 

 cisor distinguishes the skulls of this genus from any other known 



