SACCOPTERYX. 



BALANTIOPTERYX. 



611 



Geogr. Distr. Guatemala to Dutch Guiana, South America. 



Genl. Char. Like those of genus; size large; longitudinal stripes 

 on back. 



Color. Above dark brown with two white stripes along the 

 center of the back; under parts, fur brown at base, ashy at tip. 



Measurements. Total length, 42.6; tail, 15.2; forearm, 35.5; 

 thumb, 5.8; third ringer, metacarpal, 34.2; fifth finger, metacarpal, 

 29.2; tibia, 15.2; foot, 52.8; ear, 12.7; tragus, 3.5. Skull: occipito- 

 nasal length, 14; Hensel, 11.5; zygomatic width, 10; interorbital con- 

 striction, 2; width of braincase, 8; palatal length, 5; length of upper 

 molar series, 5; length of mandible, angle to symphysis, 12; length of 

 lower molar series, 6. 



125. Balaiitiopteryx. 



Balantiopteryx Peters, Monatsb. K. Preuss. Akad. Wiss. Berl., 1867, 



p. 476. Type Balantiopteryx plicata Peters. 

 Wing sac opening in center of antebrachial membrane. 



572. plicata (Balantiopteryx), Peters, Monatsb. K. Preuss. Akad. Wiss. 

 Berl., 1867, p. 476. 



FIG. 118. BALANTIOPTERYX PLICATA 



No. 8902 Field Columbian Mus. Coll 

 Enlarged 2'j times. Face view enlarged 5 times. 



