﻿MYOTIS EVOTIS. 



79 



dusky bases of the hairs showing through along the sides. The belly 

 is light broccoli brown. In front of the shoulder and just below it is 

 a small tawny olive area which contrasts strongly with the color of the 

 belly. In another specimen (Ko. 1382, collection of Dr. 0. Hart Mer- 

 riam, San Bernardino Mountains, California, August 14, 1885, F. 

 Stephens) the color is similar but a shade paler and yellower through- 

 out, the dark bases of the hairs nowhere showing through. No dark 

 shade in front of shoulder. This specimen is practically indistinguish- 

 able in color from the palest examples of M. thysanodes, but the fur is 

 much darker at base and the general color is sliglitly clearer yellow, 

 with the tips of the hairs more glossy. Other skins are duller and 

 less yellow. 



Slmll. — The skull of Myotis evotis equals that of M. tJiysanodes in 

 lengtli and mastoid breadth, but is narrower across zygomata and has 

 the occiput less elevated. The occipital outline is rounded as in ilf. 

 thyscmodeSy and the occipital crest is very slightly developed. Fore- 

 head rising above the muzzle gradually, in this respect also resem- 

 bling M. thysanodes. Rostrum more slender than in M. velifer or M. 

 thysanodes. Pterygoids and i^osterior i)art of palatines as in M. 

 thysanodes. 



The skull of Myotis evotis is easily distinguished from that of all other 

 North American species except M. suhulatus. From the latter, how- 

 ever, it differs merely in very slightly larger size. 



Teeth. — In dental characters Myotis evotis does not dilfer essentially 

 from M. thysanodes. The premolars apparently show less tendency to 

 crowding, but I can find no tangible difference in form or relative size 

 (fig. 15 e). 



Measurements. — The measurements of 8 specimens of Myotis evotis 

 from eight localities are given in the following table : 



Measuremen ts of 8 specimens of Myotis evotis from 8 localities. 



Locality. 



Sex. 



Total length. 



Tail vertebrae. 



Tibia. 



Foot. 



Forearm. 



Thumb. 



Longest fin- 

 ger. 



Ear from mea- 

 tus. 



Width of ear. 



Tragus. 



Washington: Easton , 





85 



41 



19 



8 



36 



7 



62 



19.4 



1L8 



10.8 











18 ' 



8.6 



40 



7 



64 



























California : Inyo Mountains . . . 





89 



43 



20 



7 



38 



8 



63 



23 



14.6 



13 



Owens Lake 





91 



43 



17.6 



8 



38 



6.4 



63 



22 



13.4 



12.4 



San Joaquin River . 



d 



92 



43 



19 



8 



38 



6 



62 



22 



13.6 



12 





? 



90 



42 



18.6 



8 



37 



6.4 



62 



21 



13 



11 



Nevada : Pahranagat Valley . . . 



? 



85 



40 



18 



,7.6 



36.6 



7 



62 



22 



14.6 



12 



Vera Cruz : Perote 



cf 



91 



42 



20 



9 



40.4 



6 



67 



20 



12 



11 



' Type of Yespertilio chrysonotus J. A. Allen. 



