280 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 98 
CHARACIDIUM VOLADORITA, new species 
FIGURE 32 
Holotype —U.5S. N. M. No. 121407, a specimen 40.5 mm. in stand- 
ard length collected: by Leonard P. Schultz, 4 km. above Motatén 
in the Rio Motataén, Maracaibo Basin, March 25, 1942. 
Paratypes.—All the paratypes listed below were collected by Leon- 
ard P. Schultz in the Maracaibo Basin of Venezuela during 1942. 
U.S.N.M. No. 121408, 40 specimens, 28 to 41 mm. in standard length, taken 
along with the holotype and bearing same data. 
U.S.N.M. No. 121412, 10 examples, 25 to 36 mm., from the Rfo Motatdn, 8 km. 
‘below Motatén, March 24. i 
U.S.N.M. No. 121414, 98 examples, 20 to 34 mm., from the Rio San Juan near 
the bridge south of Mene Grande, Motatdn system, March 17 and 20. 
Ficure 32.—Characidium voladorita, new species: Holotype, U.S.N.M. No. 121407, 40.5 
mm. in standard length. 
U.S.N.M. No. 121410, 27 specimens, 20 to 34 mm., from the Rfo San Pedro at 
bridge, south of Mene Grande, Motatdn system, March 20. 
U.S.N.M. No. 121418, 26 specimens, 18 to 26 mm., from the Rio San Juan, 12 
km. south of Rosario, Estado de Zulia, February 26. 
U.S.N.M. No. 121409, 15 examples, 23 to 32 mm., from the Rio Palmar near 
Totuma, about 100 km. southwest of Maracaibo, February 21. 
U.S.N.M. No. 121411, 3 specimens, 24 to 32 mm., from the Rio Machango, 20 
km. above bridge south of Lagunillas, March 21. 
This species was abundant in swiftly flowing water among rubble 
and gravel. It darts swiftly from place to place on the stream bottom 
and resembles in habit the darters of North America. 
Description.—Detailed measurements were made on the holotype 
and one paratype, and these data, expressed in hundredths of the 
standard length, are recorded first for the holotype, then for the 
paratype in parentheses. Standard lengths in mm. 40.5 (35.1). 
Length of head 25.7 (25.9); greatest depth of body 27.2 (22.5); 
diameter of eye 4.94 (4.84); length of snout 6.18 (6.25); length of 
maxillaries 6.18 (5.98); postorbital length of head 15.6 (15.7); width 
of interorbital space 5.68 (4.84); least preorbital width 2.46 (2.85); 
