APRIL, 1914. MAMMALS OF NORTHERN PERU OSGOOD 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 5. simonsi. 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 5. 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 xanthazolus 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. SOOTY AGOUTI. 



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 



