416 



Bulletin American Museum of Natural History. [Vol. XXXVII 



were taken in one day, Nov. 20, 1909. Of the males 23 are adult and 10" 

 immature; of the females 8 are adult and 13 immature. There are no very 

 young specimens. About 6 specimens are in alcohol, the others being skins 

 with skulls. 



There is practically no sexual difference in size and very little in color. 

 Young of the year are paler than adults, especially on the ventral surface, 

 and lack the tawny color on the foreneck. 



Collectors' measurements (20 adult males, 8 adult females) : 



Head and body Tail Foot Ear 



cf 204 (192-214) 12 (6-20) 34 (31-37) 31 (29-33) 



9 207 (194-215) 14.5 (10-19) 33.5 (32-35) 31.8 (30-33) 



Measurements of Skull and Forearm in 21 Males. 







Zygom. 



Maxill. 



Palatal 



Palatal 





Cat. No. 



Length 



breadth 



tooth row 



length 



for6&dth 



Forearm 



48663 



56 





18.4 



28 



18 



126 



48665 



55 



31 



17.3 



28.3 



17 



119 



48670 



53.8 



33.6 



17 



27.8 



17.4 



120 



48671 



53.7 



32.6 



18 



27.6 



' 17 



122 



48672 



53 



33.5 



17 



27.8 



17 



118 



48674 



55 



32.7 



18 



29.7 



17.2 



126 



48675 



52.3 



32 



17 



27 



16.5 



115 



48677 



55 



34.2 



18 



27.8 



17 



122 



48681 



56 



34 



18.3 



29 



17.5 



124 



48682 



54.5 



33 



18 



28 



16 



123 



48685 



52 



33.2 



18 



27 



16.8 



120 



48687 



52 



33.2 



17 



25.2 



17 



115 



48688 



52.5 



33.2 



16.6 



26.8 



16.5 



115 



48689 



51.5 



32.3 



17.2 



26.8 



16.5 



115 



48690 



54.7 



33 



17.8 



27.6 



16 



123 



48691 



54 





17.3 



28 



17 



114 



48693 



54 





18.3 



27.8 



17.6 



120 



48696 



53 



32 



17.2 



27 



15.8 



119 



48697 



51.5 



32.3 



16.8 



26.2 



17.3 



116 



48704 



53.6 



32 



18 



27.3 



18 



123 



48706 



58 



34.8 



19 



30 



18 



121 



Average 



54.2 



32.8 



17.7 



28.1 



17.5 



119 



Minimum 



51.5 



31 



16.6 



25.2 



15.8 



114 



Maximum 



58 



34.8 



19 



30 



18 



126 



1 Explanation of measurements. — Length = front border of premaxillaries to posterior border 

 of occipital condyles; palatal length = posterior border of palatal foramina to posterior palatal border; 

 palatal breadth = outside to outside of last upper molars. 



