1908.] 



DR. KNUD ANDERSEN ON BATS. 



299 



and apparently much greater constancy of these raarkings in 

 the southern race, A. t. ravus. It is a rather strange fact 

 that, so far as the facial markings are concerned, there is much 

 the same difference between the northern and southern races of 

 A. toltecus as between the northern and southern races of A. jamai- 

 censis ; also in this latter species the facial stripes are stronger 

 and more constant in the southei'n forms. 



Specimens from different localities. — Central American are in 

 every respect indistinguishable from Mexican individuals. The 

 comparative table of measurements below, in which I have 

 arranged the adult individuals examined in four sections according 

 to their habitat, shows this as far as the cranial and external 

 dimensions are concerned. 



Measurements of A. toltecus toltecus. 



