298 



DR. KNUD ANDERSEN ON BATS. 



[Apr. 7, 



definite line between A. t. toUecus and ravus ; tliey are evidently 

 a northern and southern representative of one species. 



Colour (excluding facial stripes and ear-edgings). — Dark 

 phase : — General colour of upper side very dark, approaching 

 blackish brown (being, rather, a blackish shade of drab), this 

 colour confined to the tips of the hairs ; base of hairs drab in the 

 posterior, almost ecru-drab in the anterior part of the upper side. 

 Under side drab. — This is the extreme of the dark jDhase in adult 

 specimens ; it is rather more blackish than the dai-k phase of 

 A. watsoni (p. 289). 



Light phase : — In its extreme the light phase is indistinguishable 

 from that of A. t. ravus (p. 300). 



The dark and light phases are connected by numerous 

 transitional stages, but a majority of the individuals examined 

 are more or less dark-coloured. 



Faded stripes and ear-edgings. — In a majority of adult 

 individuals there is no trace of facial stripes nor of white 

 edgings to the ears ; but individuals occur in which these light 

 markings are more or less distinct, and sometimes, though 

 rarely, they are fully developed. The subjoined table will show 

 the amount of variation in this respect in 17 adult individuals 

 of A. t. toltecus examined, as well as the stronger development 



Facial stri^yes and ear-edgings of adult indwiduals of 

 A. t. toltecus and ravus. 



