A MONOGRAPH OF THE BATti OF NORTH AMERICA. 173 



extending thence vertically to within a millimeter of free margin. 

 Other nerves of the wing' membrane and the terminal phalanges as in 

 N. bnisilietisis. The tail membrane with a well-defined line extending 

 from the middle of the thigh to the free margin of the membrane. 



Tlie first obliqne band at the radis-carpal angle is attached to the 

 mnscle mass at the base of the fifth metacarijal bone i)arallel to radins. 

 It measures 5'"™. The pouch is indistinct. 



A fibrous band lies to the inner side of the fifth metacarpal bone. 

 K. hratiilic'Hfiis has none. 



Maxillary teeth. — The incisor is cuspidate. The canine without pos- 

 terior basal i)rolongation and in contact with tiie first premolar, which, 

 while small in size and simple, is larger than in H. brasiliensis and is 

 retained in the axis of the tooth row. The remaining teeth, as in the 

 species last named, with the exception that the posterior limb of the 

 second V is complete and more than half as long as the anterior limb. 



Mandihxlar teeth. — Incisors two in number, flat crowned, deeply 

 bilobed. The remaining teeth much the same as in If. brasiliensis. 



Skull.— Length, 22"""; mesencephalon, 5™'"; greatest width, lO™"" ; 

 least width, 4""". Length of face from infraorbital canal, 4""". The par- 

 occii)ital process is broad at the base, subacuminate, not reaching to 

 the line of the middle of the condyle and no longer than the mastoid. 

 The interval occupied by the otic capsule, which, with the exception 

 of a small portion crossed by a process of the stpiamosa, is exposed. 

 The face vertex is scarcely inflated at its widest part, is very little 

 wider than the region of the proencephalon. The region of the lachry- 

 mal bone is marked by a tubercle. The orbital crest is conspicuous 

 and not produced. The line of the upper border of the anterior nasal 

 aperture if produced would intersect the dental arch immediately back 

 of the canine. The opening from the mesopterygoid fossa to the orbit 

 is large. The sagittal crest is small and confined to the region of the 

 proencephalon and metencephalon. The interval between the faintly 

 marked posterior temporal crest and the occipital crest is elevated, 

 rounded, and not triangular. The sphenoidal tongue is rudimental 

 and is not disposed from the horizontal. The basisphenoid dossie is 

 conspicuous. The tymi^anic bone is large and inflated; the mastoid 

 region small, nodular; the basi occipital is uarrrow without latteral 

 depressions, which are so conspicuous in Artibeus; the round foramen 

 of the sphenoid bone separated from the sphenoidal foramen by a sej)- 

 tum; the pterygoid process a delicate spine; the vomer extends to the 

 posteriin- border of the hard palate. 



The snuill coronoid is scarcely elevated above the level of the condyle, 

 but is one-half the width of the adjacent part of the horizontal ramus. 

 Tlie angle is broad, flat, and scarcely produced beyond tlie condyle. 

 Seen from above it is so deflected that it lies just at the outer border 

 of the condyle. The posterior border of the ascending ramus is slightly 

 concave. The masseteric imi)ression is shallow and leaves a broad in- 

 terval between it and the lower margin of the ramus. 



