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 finger, metacarpal, 34.2; fifth finger, metacarpal, 
2002 ible, 5.2) OOt, 52.6; Cat, 12.7- trapus, 3.5.  okull: 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. Balantiopteryx. 
Balantiopteryx Peters, Monatsb. K. Preuss. Akad. Wiss. Berl., 1867, 
p. 476. Type Balantiopteryx plicata Peters. 
Wing sac opening 1n center of antebrachial membrane. 
572. plicata (Balantiopteryx), Peters, Monatsb. K. Preuss. Akad. Wiss. 
Berl., 1867, p. 476. 
Fic. 118. BALANTIOPTERYX PLICATA 
No. 8902 Field Columbian Mus. Coll 
Enlarged 2% times. Face view enlarged 5 times. 
