174 



NEW SPECIES OF BAT — ALLEN. 



characteristic in appearance. This color extends from a short distance 

 upon the neck on a line with the prebrachium. The pubis is furnished 

 with shorter and more thinly distributed hair, which is obscurely bicol- 

 ored, the shafts being dusky brown, the tips ashy. The hair on the 

 wing membrane is as in A. cinerea. 



Skeleton. — The facial portion of frontal bone is greatly inflated, so as to 

 form a swelling in the orbit. The small lachrymal process, which is 

 present in A. cinerea, is absent here. In other respects the parts are as 

 in A. cinerea and A. novehoracensis. Teeth the same as in these species. 



The fifth metacarpal bone lacks one-seventh of being as long as the 

 fore-arm ; the fourth metacarpal bone is as long as the fore-arm. The 

 fourth metacarpal bone is not concealed when the third and the fifth 

 metacarpals are approximated. 



The wing membrane is attached to the epitrochlea, thus leaving the 

 olecranon and the epicondyle free dorsad. Width of prebrachium at 

 the elbow 1^ less than width of membrane from the elbow downward. 

 Dimensions. — The manal formula is as follows : Fourth interspace, 

 34mm . tijird interspace, 13'"'" ; difterence between third and fourth inter- 

 spaces, 21""" ; fore-arm, 40""". 



This may be compared with advantage to the manal formula in A. 

 novehoracensis: Fourth interspace, SS"""; third interspace, 10'""' ; dif- 

 ference between third and fourth interspaces, 23"'" ; forearm, 37""". 



The manal foriuula of A. cinerea is as follows : Fourth interspace, 

 40"'™ ; third interspace, 13^""" ; difference between third and fourth in- 

 terspaces, 27^™" ; fore-arm, 49"" ". 



Measurements. 



Millimeters. 



Head 19 



Trunk 32 



Auricle 8 



Tragus 7 



Tibia 20 



Femur 18 



Calcaueuui 18 



46 



TaiL 



40 



Fore-arm 



First digit : 



Metacarpal 4 



First phalanx 5 



Second phalanx 2 



Second digit : 



Metacarpal 51 



First phalanx 6 



Hab. — Sandwich Islands. Mr. Valdemar Knudsen.* 



Millimeters, 



Third digit: 



Metacarpal 52 



First phalanx 18 



Second phalanx 20 



Fourth digit: 



Metacarpal 47 



First phalanx 11^ 



Second phalanx 14 



Fifth digit : 



Metacarpal 40 



First phalanx 9 



Second phalanx 8 



* Having been requested to revise the proofs of this article, ovring to the absence 

 of the author, I venture to add a few notes reyardin;;- the specinieus upon which the 

 species is based. With one exception, all were obtained by Mr. Valdemar Kuudsen, 

 a former resident of the Sandwich Jslauds, aad for many years a valued correspoud- 



