232 FISHES OF WESTERN SOUTH AMERICA 
276. MOENKHAUSIA ATAHUALPIANA (Fowler) 
Astyanax atahualpianus Fowler, 1906 (1907), Proce. Acad. Nat. Sci. Phila., LVIIT, 436, fig. 36, 
Pebas, Orton collection of 1877. 
Moenkhausia atahualpiana Figenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 437. 
Moenkhausia oligolepis (in part) EKigenmann, 1917, Mem. Mus. Comp. Zool., XLII, i, 79, Pebas. 
Rio Maranon 
277. MoENKHAUSIA BONDI (Fowler) 
Phenacogaster bondi Fowler, 1911, Proc. Acad. Nat. Sci. Phila., 419. 
Moenkhausia profunda Eigenmann, 1912, Mem. Carnegie Mus., V, 322. 
Moenkhausia bondi Eigenmann, 1917, Mem. Mus. Comp. Zool., XLII, 1, 69, pl. xiv, fig. 3; pl. ¢, 
- 
fig. 7. 
Caribbean coast to Para and Peru 
15878, 28, 32-75 mm., brook, Rio Itaya, Iquitos, Allen, September, 1920. 
15881, about 70, 830-75 mm., ponds, brooks, Iquitos, Allen, September, 1920. 
15885, 9, 48-53 mm., creek, Yurimaguas, Allen, November, 1920. 
Much compressed; depth considerably more than half the length; ventral 
profile an almost perfect arc; a humeral band followed by a faint band of lighter 
color, and that by a faint band of dark color. Close to Ephippicharax except for 
the absence of a movable predorsal spine. Our records extend the known dis- 
tribution some two thousand miles. 
278. MoOENKHAUSIA SIMULATA Eigenmann and Pearson 
Astyanax simulatus Eigenmann, in Pearson, 1924 (1925), Ind. Univ. Studies, no. 64, 41. 
Moenkhausia simulata Eigenmann and Pearson, in EKigenmann and Myers, 1929, Mem. Mus. Comp. 
Zool., XLIII, v, suppl., 523, pl. lvii, fig. 3. 
Basin of Rio Pichis 
15860, 10, type and paratypes, 35-72 mm., creek, Puerto Bermudez, Rio Pichis, Allen, July, 1920. 
Known only from this clear stream entering the Pichis, which is usually muddy, 
at the head of launch navigation and the end of the ‘‘Pichis trail’ and the foot of 
the “‘Cadena de la Sal’. 
Alluded to under the name Astyanax simulatus by Pearson, 1924; finally de- 
seribed by Eigenmann and Pearson in Myers’ supplement to Eigenmann and 
Myers, Part V of The American Characidae. 
Near Moenkhausia latissima, differing most strikingly in the almost complete 
suppression of the humeral spot, which is vertical, and in the much more pronounced 
longitudinal stripes in the middle of the scale rows, while in latissima they are much 
broken and follow the boundaries of the scale rows. The caudal is but slightly 
scaled. 
Suggests Bario steindachneri in coloration, but is readily separable by the small 
size of the nuchal scale, absence of crenulations on the scales, and the unbroken 
character of the stripes. No caudal spot, or at most an indistinct one. 
