AMERICAN BATS OF THE GENERA MYOTIS AND PIZONYtJf 101 

 Cranial measurements of Mi/otis occultus 



Locality 



^ ho 



T3S. 



T3.9 





New Mexico: 



Luna 



Do 



Do 



Ruidosa 



Do 



Do 



Zuni Mountains 



Do 



Do ._ 



Do- 



Arizona: 



Fort Verde 



Lakeside.. 



Do. 



Do 



Montezuma Well 



San Francisco Moun- 

 tain 



California: 



Needles 



Do 



Near Yuma 



Do 



Do 



Do 



Do... 



Potholes. 



15.2 

 15.3 

 15.0 

 15.6 

 15.4 

 15.0 



14.2 



14.4 

 14.6 

 15.0 

 15.0 

 14.2 



10.0 

 10.0 

 9.4 



16. 0| 



15.8; 



15.4 

 15.0 



16.0 

 15.2 



16.0 



15.0 

 15.0 



15.7 

 15.0 

 15.6 

 15.4 

 15.4 



14.6 

 15.1 

 15.0 

 14.4 



15.0 



14.6 

 14.0 



15.0 

 14.5 

 14.7 

 14.8 

 14.6 



10.1 

 10.5 

 10.4 



9.8 

 9.5 



9.3 



9.6 

 10.0 



9.8 

 10.4 



9.8 



9.7 

 10.0 

 10.0 



11.0 

 11.2 

 11.6 

 11.6 

 11.6 

 11.2 

 12.3 

 12.2 

 12.2 

 12.6 



11.4 

 11.9 

 11.8 

 12.0 



6.0 

 6.1 

 6.0 

 6.0 

 6.0 

 6.0 

 6.4 

 6.4 

 6.4 

 6.6 



6.0 

 6.0 

 5.8 

 6.0 



11.2 5.6 



11.8 



11.2 

 11.0 

 11.4 

 11.6 

 11.3 

 11.7 

 11.2 

 11.6 



6.2 



5.8 

 5.6 

 6.3 

 6.3 

 6.3 

 6.4 

 6.2 

 6.3 



* Type of Myotis baileyi Hollister. ^ Type. 



MTOTIS KEENII (Merriam) 



(Synonymy under subspecies) 



Distribution. — Northern North America from the limits of tree 

 growth south in the east to South Carolina and Arkansas, and in the 

 west to northwestern Washington, 



Diagnosis. — Size and general appearance much as in Myotis luci- 

 fugus, but tail relatively longer (average ratio of tail to head and 

 body in 8 specimens from eastern Canada, 85.3 ; in 8 from New York, 

 89.4; in 5 from Missouri, 87.4; and in 5 from the Northwest Coast 

 85.7) ; ear actually longer (height from meatus usually 15.6 to 17.0 

 mm.), extending slightly beyond tip of nose when laid forward; 

 tragus more slender; foot about half as long as tibia instead of ob- 

 viously more than half as long; forearm usually 35 to 38 mm.; skull 

 more slender than that of M. lucifugus (compare pi. 1, p. 7, figs. 15 

 and 14) , its greatest length ranging from 14.8 to 15.6 mm. ; sagittal 

 crest occasionally present ; maxillary tooth row about 6 mm. in length 

 and slightly exceeding the greatest width of palate including molars. 



Ears. — The ears are narrower and longer than in Myotis lucifugus; 

 when laid forward they reach about 4 mm. beyond the nose (alcoholic 

 specimens). Tragus long, the distance from its inner base to tip 

 about 47 per cent of total height of ear (8 :17 mm.) ; its inner margin 



