304 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
ROEBOIDES DAYI DAYI (Steindachner) 
Anacyrtus (Rhaeboides) dayi STEINDACHNER, Denkschr. Akad. Wiss. Wien, vol. 
39, p. 61, 1878 (Rio Magdalena). 
? Roeboides dayit E1GENMANN, Indiana Univ. Stud., vol. 7, No. 44, p. 12, 1920 
(El Concejo, Rio Tiquirito, Venezuela [Lake Valencia Basin]). 
Since no specimens from Lake Valencia are available to me, I 
cannot work out the relationships of ‘“‘dayii”’ from Lake Valencia in 
regard to the new subspecies. 
ROEBOIDES DAYI DIENTONITO, new subspecies 
DIENTONITO 
Figure 39 
Holotype.—U.S.N.M. No. 121370, a specimen 63 mm. in standard 
length, collected by Leonard P. Schultz, March 6, 1942, in the Rio 
Palmar at the bridge, 70 km. southwest of Maracaibo. 
Paratypes.—All the paratypes were collected by Leonard P. Schultz 
during 1942 in the Maracaibo Basin of Venezuela: 
U.S.N.M. No. 121372, 14 specimens, 25.5 to 65 mm., collected along with the 
holotype and bearing same data. 
U.S.N.M. No. 121380, 1 example, 64 mm., taken February 21 in the Rfo Palmar 
near Totuma, about 100 km. southwest of Maracaibo. 
U.S.N.M. No. 121376, 2 examples, 16 and 53.5 mm., obtained February 26 
from the Rio San Juan, 12 km. south of Rosario, Estado de Zulia. 
U.S.N.M. No. 121388, 140 specimens, 27 to 76 mm., collected March 2 in the 
Rio Negro below mouth of Rfo Yasa. 
U.S.N.M. No. 121384, 71 specimens, 27 to 76 mm., taken February 24 in the 
Rio Socuy, 3 km. above the mouth. 
U.S.N.M. No. 1213877, 26 examples, 37 to 60 mm., taken February 26 in the 
Rio Apén, about 35 km. south of Rosario, Estado de Zulia. 
U.S.N.M. No. 121374, 24 examples, 11.5 to 45 mm., collected March 8, in a 
pond tributary to Rio Gé near Rosario. 
U.S.N.M. No. 121375, 112 specimens, 29.5 to 50 mm., collected May 1 in the 
Rio Agua Caliente, 2 to 3 km. above Lago Maracaibo. 
U.S.N.M. No. 121379, 155 specimens, 19 to 68 mm., taken March 1 in Lago 
Tulé about 75 km. west of Maracaibo, tributary to Rio Socuy. 
“U.S.N.M. No. 121371, 91 examples, 20 to 74 mm., taken March 11 in Ciénaga 
del Guanavana about 10 km. north of Sinamaica. 
U.S.N.M. No. 1213878, 5 examples, 27 to 55 mm., taken March 16 in the Rio 
Machango at bridge south of Lagunillas. 
U.S.N.M. No. 121382, 20 specimens, 24 to 48 mm., taken March 11 in a cafio 
% km. west of Sinamaica. 
U.S.N.M. No. 121381, 21 examples, 19 to 59 mm., collected March 17-20 in 
the Rfo San Juan near bridge south of Mene Grande, Motatdn System. 
U.S.N.M. No. 121373, 2 examples, 39 and 538 mm., taken March 20 in the 
Rio San Pedro at bridge, Motatdn system. 
Description.—This description is based on the holotype and para- 
types listed above. Detailed measurements were made on the holo- 
type and one paratype, respectively, and these data are expressed in 
hundredths of the standard length. Standard length in millimeters 
63 and 565. 
