CHARACINIDAE FROM VENEZUELA—SCHULTZ 349 
1b. Dorsal fin without well-defined black markings; no humeral spot. 
2a. No caudal spot; caudal lobes crossed by a broad black marginal or sub- 
marginal band; maxillary with 2 to 4, five pointed teeth, posterior one 
sometimes conical; dorsal rays 11; anal 20 to 24; scales 5—29 to 34—4. 
Hemigrammus marginatus Ellis 
2b. Caudal spot present, an unpigmented area between it and lateral stripe; 
maxillary with one 7-pointed tooth; dorsal rays 11; anal 24; scales 4—32— 
ANNEAL IE PIE M EVEN Dah es Giana Mes MEE RUD) 8 Hemigrammus micropterus Meek 
HEMIGRAMMUS UNILINEATUS (Gill) 
Poecilurichthys unilineatus Gitu, Ann. Lyc. Nat. Hist. New York, vol. 6, p. 60, 
1858 (Trinidad). 
Hemigrammus unilineatus EIGENMANN, Mem. Mus. Comp. Zool., vol. 48, pt. 2, 
p. 141, 1918 (Los Castillas, Venezuela) —FowueEr, Proc. Acad. Nat. Sci. 
Philadelphia, vol. 88, p. 407, 1931 (Cafio Guanoco, Venezuela). 
The following collections, made by Dr. William Beebe, were lent 
to me for study and report. 
One specimen, 25 mm., East Caripito Creek, Caripito, Venezuela, June 3, 
1942. 
Twelve specimens, 13 to 20 mm., Caripito, Venezuela, 1942. 
One specimen, 39 mm., Caripito, Venezuela, 1942. 
HEMIGRAMMUS MARGINATUS Ellis 
Hemigrammus marginatus Eu1is, Ann. Carnegie Mus., vol. 8, No. 1, p. 159, pl. 3, 
fig. 3, 1911.—? EIGENMANN, Indiana Univ. Stud., vol. 7, No. 44, pp. 10-11, 1920 
(Maracay, Rio Bue, Isla del Buro, Venezuela).—? Prarsn, Univ. Wisconsin 
Stud., No. 1, p. 12, 1920 (Lake Valencia, Venezuela).—EHI1GENMANN and 
Myers, Mem. Mus. Comp. Zool., vol. 43, No. 5, p. 529, 1929 (questions 
Higenmann’s identification of Lake Valencia specimens). 
HEMIGRAMMUS MICROPTERUS Meek 
Hemigrammus micropterus MEEK, in Eigenmann and Ogle, Proc. U.S. Nat. Mus., 
vol. 33, pp. 18, 15, 1907 (Los Castillas, Venezuela, Orinoco system).—EIGEN- 
MANN, Mem. Mus. Comp. Zool., vol. 48, pt. 2, p. 150, pl. 18, fig. 3, pl. 78, fig. 
6, 1918 (Los Castillas, Venezuela).—Fowurr, Proc. Acad. Nat. Sci. Phila- 
delphia, vol. 83, p. 408, 1931 (Pitch Lake at Guanoco, Venezuela). 
Genus HYPHESSOBRYCON Durbin 
Hyphessobrycon DurxBin, Bull. Mus. Comp. Zool., vol. 52, p. 100, 1908. (Type, 
Hemigrammus compressus Meek.) 
KEY TO THE SPECIES OF HYPHESSOBRYCON REPORTED FROM VENEZUELA 
la. Maxillary with 4 to 7 conical or tricuspid teeth; usually 2 teeth in outer row 
of premaxillary; a small black spot at base of each caudal lobe; no black 
lateral stripe and no humeral spot; anal rays 19 [probably iii, 17]; scales 32 
Ue Atel es IG a oh, SCN ON ea LA UR arg Ul Hyphessobrycon riddlei (Meek) 
16. Maxillary usually with one tooth; 3 or 4 teeth in outer row of premaxillary; 
a very distinct continuous black lateral streak from behind head to tips 
of middle caudal fin rays; anal rays iii, 15 to iii, 21; scales 30 or 31. 
Hyphessobrycon sovichthys, new species 
