APRIL, 1914. MAMMALS OF NORTHERN PERU — Oscoop 167 
those given for the type. The type locality, 8 miles south of Huama- 
chuca, is not far from this region which appears to be almost or quite 
the northern limit of the range of the genus Eligmodontia. These mice 
were caught in tall grass and weeds growing about the bases of rough 
limestone exposures on the very top of the mountains. 
Holochilus sp. 
One specimen too young for specific determination was taken at 
the edge of a grassy opening in the forest at Tambo Yaku. It is of 
importance, however, since it greatly extends the range of the genus 
Holochilus, heretofore known only from eastern South America. 
Sigmodon peruanus Allen. 
Four specimens, Pacasmayo. 
The reference of these to Sigmodon peruanus is provisional. Pacas- 
mayo is situated about halfway between Trujillo, the type locality of 
Sigmodon peruanus, and Eten, the type locality of S. stmonst. Our 
specimens of Sigmodon taken there seem somewhat intermediate between 
the two named forms, but to which they are nearer is uncertain since 
the type of peruanus and only known specimen from Trujillo is so aged 
and in such poor condition of pelage that no fair comparisons with 
other existing specimens are possible. The Pacasmayo specimens are 
slightly larger and darker colored than topotypes of S. simonsi but they 
agree in having distinct buffy eyerings and bicolored tails whereas the 
type of peruanus has only slight indication of an eyering and its tail is 
a dull buffy brown scarcely darker above than below. It is doubtful 
if these characters are wholly the result of the age of the type, but in 
the absence of topotypes, the name peruanus may be applied to our 
specimens. Efforts to obtain topotypes were unsuccessful and although 
we trapped assiduously at Trujillo for several days, we caught only 
Oryzomys xantheolus where we hoped for Sigmodon. During a much 
longer time at Pacasmayo, only four specimens were taken and of these 
only three in traps, the fourth having been killed with small shot as it 
ran across a sandy space between two thorny bushes. 
Dasyprocta fuliginosa Wagler. Soory Acoutt. 
An adult male obtained near Balsapuerto seems referable to this 
species. Others were seen near Rioja and Moyobamba. It is their 
habit to come out in early evening and sit at the edge of a road or trail 
