A MONOGRAPH OF TTTE BATS OF NORTH AMERICA. 



171 



Measurements from first edition of Monofiraph. 



Current num- 

 ber. 



525r5 

 5494 



5227 

 5219 



5225 



From 

 tip of 

 uose to 



tail. 



In. 

 2.6 



2.4 

 2.3 

 2.3 

 2.0 



Length 



or 



tail. 



In. 

 1.3 

 1.1 



1. u 



1.3 

 1.3 

 1.2 

 1.3 

 1.2 



Length 

 of toro- 

 arm. 



In. 

 1.7 

 1.9 

 1.7 

 1.0 

 1.0 

 1.7 

 1.0 



i.e 



Lengtli 



of 



tibia. 



In. 

 0.0 

 0.0 

 0.0 

 0.0 

 0.0 

 0.0 

 0.5 

 0.0 



Length 



of 

 longest 

 finger, 



In. 

 3.0 

 3.0 

 3.2 

 3.2 

 3.0 

 3.0 

 3.0 

 3.0 



Length 



of 

 thumb. 



In. 



0.4 



0.4 



0.3 



0.4J 



0.3 



0.3 



0.3 



0.3 



Height 



of 



ear. 



In. 

 0.7 

 0.7 

 0.6 

 0.6 

 0.7 

 0.7 

 0.7 

 0.7 



Heiglit 



of 

 tragus. 



In. 



0.2 

 0.2 

 0.2 

 0.2 

 0.2 

 0.2 

 0.2 

 0.2 



ICx- 

 panse. 



In. 

 11.0 

 10.3 

 10.0 

 9.9 

 10.0 

 10.0 

 10.4 

 10.3 



Katiire 



of 

 specimen. 



Alcoliolic. 

 Do. 

 Uo. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 



List of specimens. 



2. Nyctinonius macrotis nevaden.sis H. Allon. (Plates xxxiv, xxxv.) 



Nyciinomus macrotis Gray, Aim. Nat. HLst., iv, 1839, 5; Doltson, Proc. Zool. Soc. 



London, 1876, 729, Fig. 6. 

 Dysopes auritus'Siitt, Wagner, ^Yieg•ll1. Archiv, 1843, 368; Burmeister, Tliiere Bra- 



silieus, 1854, 69. 

 Dijsopes laticaudatus and cxecus Rengger, Siingeth. Paraguay, 1800, 88. 

 Di/sopes aurisjyinosis Peale, U. 8. Explor. Exped., viii, 1844, 21. 

 Nyciinomus aiiritns Peters, MB. Akad. Berlin, 1865, 573. 



Two specimens from Nevada in the I^ational Musenm present many 

 cliaracters in common with X. macroti.<i, as this species is described by 

 Gray* and Dobsont. In both forms the ears are niiited by a band, 

 the keel of auricle is curved upward and backward, the tragus is small 

 and of the quadrate type, the ear-conch is thin and translucent, and 

 the terminal phalanx of the fourth linger measures but l'""", and is 

 shorter than terminal phalanx of the fifth finger. There is also a gen- 

 eral agreement in other measurements. Nevertheless, the specimens 

 sail not be received into any of the species of Xyctinomus hitherto de- 

 scibed. As compared with descriptions of N. macrotis., its nearest ally, 

 the muzzle is not "concave" between the ears. The tragus is convex 

 above instead of being "straight or concave," nor does its lower half 

 form a "prominent angular projection." The fur, instead of being of a 

 "reddish-brown beneath and above," is, on the dorsum, of a uniform 

 dark plumbeus (mouse color), the base of the fur being the same as the 

 tips. A faint line of fur extends along the forearm to the distal one- 



*Ann. Nat. Hist., iv., 1839, 5. 

 tCat. Chirop. Brit, Mus,, 1878, 435, 



