1894.] Zoology. 67 
to blue black and brownish-black. This is shown in a finely graduated 
series of intermediates in the American Museum of New York. Birds 
taken during the summer represent the extreme of faded and abraded 
plumage. 
On Three New Genera of Characinide.—The following gen- 
era were found by Mr. H. H. Smith in the upper waters of the 
Jacuhy River in the Brazilian State of Rio Grande do Sul. 
Asrpnonicutiys. This is Anacyrtus with imperfect lateral line, a 
few anterior scales only displaying it. The only species is A. stenopte- 
rus sp. nov., Which has the following characters. Seales large, l. 1. 42; 
l. tr. 20. Radii; D11; A 46; V9; P15. Depth 2.66in length less 
caudal fin; head in do 3.8. times. Eye 3, equal interorbital space. 
An obscure postclavicular spot; no basal caudal spot. 
CHORIMYCTERUS. This is Characidium with two series of teeth in 
the lower jaw; the external series, like the premaxillaries, tricuspidate ; 
the posterior series simple. Lateral line complete. C. tenuis sp. nov. 
Scales large, 3—39—2. Radii; D 11; A 9; V 9; P 12. Depth 
one seventh; head one fifth; eye one third. Silvery, scales with 
shaded edges. . 
Drapoma. Teeth as in Tetragonopterus. Operculum excavated 
above and with sub-operculum produced below lateral line and above 
pectoral fin to an obtuse apex. No gill-rakers on principal limb of first 
gill arch. Dorsal fin entirely posterior to ventrals. Belly not acute; 
an adipose fin. Lateral line interrupted. D. speculiferum sp. nov. 
Scales large; 4—37—5. Radii; D. I 9; A. H 20. ¥ T PAL 
Depth 3.25; head 3.6; eye 3, equal interorbital width. Border of 
anal concave. Reflection of metallic mercury, especially on the oper- 
culum. No spots—E. D. Cope. 
Descriptions of Three New Rodents from California and 
Oregon. 
1. NEOTOMA MONOCHROURA. Sp. nov. 
(Type, No. 1739, Ad. 3, Col. Academy Natural Sciences, Phila., 
Grant’s Pass, Josephine Co., Oregon ; col. by Geo. Kenzer.) 
Description.—Size large, tail long, unicolor, exceeding length of 
head and body. Above, dark brownish gray, darkest medially, 
brownest on sides from nose to root of tail; tail uniform blackish 
brown, thickly and equally clothed above and below with rather short 
coarse hairs ; color of tail never (?) appreciably lighter below than above 
as often seen in N. fuscipes; chin, throat, inside of fore-legs to toes, 
