186 THE AMERICAN CHARACIDAE. 
which are a little thicker on the caudal peduncle and on the third and fourth 
scales of the lateral line and the 3 scales above them. The chromatophores 
are thinner over a small vertically elongate area immediately behind the humeral 
area just described. The lateral stripe very slender extending entirely to the 
caudal. Dorsal with a round intensely black spot on the first seven rays, the 
tips of the second and third rays white. The distal half of the longest anal ray 
and the tip of the next ray also white. All the fin-rays dusky. Scales on the 
sides with a pale blue iridescence in life. Rosy tinged, especially above anal, 
base of caudal lobes, and ventrals. Anal lobe and base and tip of dorsal lobe 
bright orange. 
9. HyPHESSOBRYCON HASEMANI Fowler. 
Hyphessobrycon hasemani Fow er, Proc. Acad. nat. sci. Phil., 1913, p. 545, fig. 13 (Madeira River, 
above the Falls of Guajaramirim, approximately in Lat. 8. 10° 47’, Long. W. 65° 23’). 
This species is known only from the type, a specimen 28 mm. long, collected 
by E. A. Smith. 
Head 3.25; depth 3.125; D. 10; A. 30; scales 32, 10 scales between dorsal 
and ventral; 11 predorsal scales; snout 4.25; eye 3.6; interorbital 3.5 in the 
head. No maxillary teeth; suborbitals completely covering cheeks. 
No humeral or caudal spot, a black spot slightly above the middle of the 
first seven dorsal rays. 
10. HypHESSOBRYCON PANAMENSIS Durbin. 
Plate 26, fig. 1; Plate 33, fig. 4. 
Hyphessobrycon panamensis Dursin, Bull. M. C. Z., 1908, 52, p. 101 (Boqueron River, Panama); 
E1GenMAnn, Rept. Princeton univ. exped. Patagonia, 1910, 3, p. 436. 
Hemigrammus minutus Meek & HitpeBRanp, Field mus. Publication, 1912, Zool. ser., 10, p. 67 (Rio 
Agua Clara, Panama Canal Zone). 
Haprrar.— Panama and Colombia. 
Specimens examined. 
Catalogue Number of Size 
number specimens in mm. Locality Collector 
20688 Cer 1 31 Panama Hassler Exped. 
20688 re 6 29-32 Panama Hassler Exped. 
—— U.S.N.M. 1 32 Boqueron River, Panama  Busck 
