FF.K. 1903. MEXICAN* MAMMALS ELLIOT. 145 



Oryzomys *molestus. Sp. nov. 



One specimen from Ocotlan, State of Jalisco. 



Type locality. Ocotlan, State of Jalisco, Mexico. 



Gen. char. Size large: ears small: tail very long; color 

 "beneath uniform. Skull about half as broad as long; supraor- 

 bital beads diverging posteriorly from least interorbital width in 

 almost straight lines; unlike those of O.fulgens; palatal arch with 

 an azygos point; palatine foramina very long and broad. 



Color. Above dark fulvous; flanks pale buff; forehead darker 

 than back; under parts grayish white: tail nearly naked, pale 

 brown above, lighter beneath: ears pale brown. 



Measurements. Total length, 325; tail beneath, 170; hind 

 foot, 38. Skull: greatest length, 35; Hensel, 28; zygomatic 

 width, 18; mastoid width, 14; length of nasals, 14; width of 

 rostrum, 6; interorbital constriction, 6; palatal length, 7; length 

 of upper tooth row, 6. 



This is one of the largest species of the group and is nearest 

 to O. fulgens, but differs from that form in its darker color on the 

 upper parts, and in being grayish white below instead of washed 

 with fawn. Unfortunately but a single example was procured, 

 and as the type locality of O. fulgens is unknown the two animals 

 may be widely separated in their habitats. I have compared the 

 present specimen with the large series in the collection of the 

 Biological Survey in the National Museum, Washington, and it 

 did not agree with any of the examples. 



GENUS RHITHRODONTOMYS. 



Rhithrodontomys. Giglioli. Richer, interm. alia Distrib. Geog. Gen. 



Roma, 1873, p. 160. 

 Rhithrodontomys tinexspectatus. Sp. nov. 



Type locality. Patzcuaro, State of Michoacan, Mexico. 



Gen. char. Similar to fi. levipes, but whitish on under parts 

 instead of pale fulvous, and tip of tail white. Ears large; tail 

 long. 



Color. Upper parts mixed black and tawny ochraceous; 

 sides ochraceous buff; chin, upper part of throat, hands and feet 

 white; under parts grayish white, slightly tinged with buff; limbs 

 like sides. Tail above blackish brown, tip white, beneath whit- 

 ish. Ears naked, dark brown with a slight edging of brown and 

 a tuft of ochraceous hairs at base. 



Molestus, troublesome, irksome. 

 Mnrxspectatus, a, urn, unexpected. 



