328 PROCEEDINGS OF THE ACADEMY OF [1889. 



Vesperus hesperus. 



Intercostals three in number, the lowest appearing at the knee and 

 passing to the free margin of the endopatagium. 



Intercosto-humeral appears at the middle of the humerus ; it is 

 simple and apparently joins a vertical line which is extended down- 

 ward from the elbow. 



The internal-cutaneous with a single inferior line, but with no 

 superior obliques. 



The fourth interspace with digital nerves as in Vespertilio, in this 

 regard markedly differing from other examples of Vesperus which 

 have been examined. 



The interfemoral membrane provided with a pubocalcaneal line. 



Scotophilus temminckii. 



Prebrachium with ridge appearing on dorsal surface near the 

 radius as in V- noctula. The intercostals two in number raised and 

 bold, the lower receives an accession from the region of the knee. 

 The intercosto-humeral unbranched. It appears at the middle third 

 of the humerus. A well-defined oblique tibial line passes upward 

 and outward. The internal-cutaneous nerve is of great simplicity, 

 the superior obliques small, and imperfectly defined, the inferior two 

 in number, bolder. The nerve ends in a linear structure to the side 

 and beyond the terminal phalanx of the fifth digit, as in V. murinus 

 The muscle-mass of this digit with two oblique lines. 



The fourth interspace with one oblique line from the muscle-mass. 

 The predigital much the same as in Vesperugo fuscus The main 

 nerve in the angle divides below the oblique line, one branch going 

 to the fifth digit and the other forward and downward obliquely 

 across the interspace. The postdigital is small and appears at the 

 metacarpophalangeal joint. 



The third interspace with the predigital from the first interphal- 

 angeal and the postdigital from the metacarpophalangeal joint. 



The interfemoral membrane with several caudal lines and one 

 long branched line from pubis which does not, however, reach 

 the tibia. 



V. subulatus var. from Mammoth Cave. 



The prebrachium as in Vesperus. The endopatagium with eight 

 oblique lines extending from the trunk and the leg. These lines 

 ai'e distinct from those described in other species. They pursue a 

 different course, end on the intercosto-humeral system, and appear 

 to be distinct from the nerves of the side of the body and the 



