A MONOGRAPH OF THE BATS OF NORTH AMERICA. 169 



and deepened somad, especially at the angle, where a large recurved 

 process Iroin the border is seen. The coronoid extends toward this 

 process and nearly reaches it; tlnis the coronoid is not curved down, 

 ward as in the case generally in other than the inolossids. The lower 

 lip of the glenoid cavity projects markedly, makiiii;' the glenoid very 

 concave; the lateral margin is convex; the median margin is straight. 

 The triceps impression is strictly axillary, with a greater tendency to 

 encroachment on the dorsum. 



Humerus: Axis of head very oblique to the axis of the shaft. The 

 pectoral ridge equals one-fifth the length of the shaft The external 

 tubersity greatly exceeds the inner in height. The ei)itrochlea is pro- 

 duced as a spine, which reaches below the trochlea. The inner half of 

 the trochlea is scarcely grooved anteriorly. 



Ulna: The proximal part of the ulna equals half of the length of the 

 radius ; the articular surface bears a longitudinal crest. The distal part 

 form a quadrate imperforate plate. 



Pelvis: The innominate bones do not unite at the symphysis. Each 

 bone is firmly anchylosed to the sacrum. The symphysal border is 

 three times as long as the pectineal spine. The thyroid foramen is 

 nearly circular. The sacrum is composed of three elements, the spines 

 of which increase from above downward. The caudal vertebrte are 

 eleven in number. The first two resemble the sacral elements in having 

 broad, flat, conjoined lateral processes. The others are like caudal ver- 

 tebrae generally in mammals. 



Habitat. — Subtropical and tropical America apparently everywhere 

 abundant. It is sometimes so numerous in the Southern cities of the 

 United States as to render houses uninhabitable by their disagreeable 

 odor and the noise they make in moving about. 



I had an opportunity in December, 1880, to study a number of living 

 animals which had been collected by Mr. James Bell at Gaines^^lle, 

 ria,, and sent to me by Prof. Baird. They did not resist handling and 

 made no defense. The mouth was not open in excitement, nor was any 

 cry emitted; a slight purring sound was occasional!}' heard. The feet 

 were used to dress the fur and to scratch; the outer side of the thigh 

 was easily reached by abducting the foot, the last-named act being in- 

 duced doubtless by the long peroneal muscle, the knee at the same time 

 being moderately flexed. Extension of the wingoften occurred (;is though 

 in preparation for flight), as terrestrial animals stretch their limbs in 

 arousing from sleep. In such a movement the inferior extremity was 

 abducted by the traction of the fifth finger on the wing membrane. In 

 standing the trunk was prone, the head slightly elevated, the wings 

 folded, the toes separated, the first and fifth toes being farther apart 

 from their neighbors than were the second and third from one another. 

 The foot was dorsifiexed and the jilantar surface was on the ground. 

 Walking was accomplished with ease and carried the little creature 

 quickly along. The manusin this act remained folded, and the motion 



