1 66 Miller ~ Specimen of Euderma Maculatum. 



striking illustration of the uncertainty that attends the study of 

 bats. The animal occurs in a region that has recently been the 

 field of the most systematic biological explorations ever carried 

 on in any country, yet only two individuals have been taken, and 

 both of these were procured by persons not specially interested 

 in mammals. All that trained collectors have added in more 

 than a decade to our knowledge of Euderma is the vague second 

 hand report that the Vegas Valley, Nevada, is visited during hot 

 weather by a large bat with jackass ears and white shoulder 

 stripes.* 



Through the kindness of Dr. J. A. Allen, I have been enabled 

 to compare the Mesilla Park specimen with the type. In every 

 way the individuals closely agree, even to minute details of 

 size. The measurements of the two are as follows, those of the 

 type in parenthesis: Total length, 107 (110); head and body, 60 

 (60); tail, 47 (50); tibia, 19.6 (21); foot, 9.8 (9); forearm, 49.6 

 (50); thumb, 9 (6.8); second digit, 42 ( ); 'third digit, 86 (91); 

 fourth digit, 72 (76.2); fifth digit, 64 (67.3); ear from meatus, 

 41 (34); ear from crown, 43 ( ); width of ear, 25 (22); tragus, 

 14 (13); greatest width of tragus, 5 (5); skull, greatest length, 

 18.8 (19); basal length, 18; basilar length 16 (16.5); zygomatic 

 breadth, 10.4 (10.9); greatest breadth of braincase above roots 

 of zygomata, 9.4; greatest diameter of audital bulla, 5.8 (5.8); 

 mandible, 12.6 (12.7); maxillary toothrow, exclusive of incisors 

 (alveoli), 6; maxillary toothrow, including incisors (alveoli), 6.8 

 (6.8); mandibular toothrow, exclusive of incisors (alveoli), 6.4; 

 niandibular toothrow, including incisors (alveoli), 7.2 (7.6). 

 The species has been so thoroughly described that there appear 

 to be no further important characters to note. The skull, how 

 ever, has never before been figured, and that of the type is lost. 



*North American Fauna, No. 13, p. 49. October 16, 1897. 



