neio Hesperomys and Gpdeafrom Bolivia. 623 



Mr. Bridges at Santa Cruz some seventy-five years ago, and 

 a few odd specimens collected by Herr Steinbach, almost no 

 collections liave been made in this area, so that all those 

 sent by the Marquis de Wavrin are very acceptable, and the 

 occurrence of these two new ones was quite to be expected. 



Hesperomys niuriculus, sp. n. 



A comparatively large dark species, rather like Mus 

 musculus. 



General size abont as in //. muscuh'nus. General colour 

 dark mouse-grey, the tips of the hairs inconspicuously butfy. 

 Under surface soiled greyish, the hairs slaty at base and 

 washed terminally with dull whitish, far less white than in 

 other species. Proectote of ears blackisli, with buffy edges, 

 metentote buffy brown ; no white ear-patch. Hands and 

 feet grey. Tail about as long a:j the body without the head, 

 dark grey above, rather lighter below. Number of mammte 

 not known. 



Skull of the usual sliape, the adult with very well-deve-- 

 loped supraorbital ledges. 



Dimensions of the type (measured in the flesli) : — 



Head and body 89 mm.; tail 69 ; hind foot 20 ; ear 16. 



Skull: greatest length 25"3j condylo-incisive length 24; 

 zygomatic l)readth 13*2 ; nasals 10 , interoibital breadth 4:'2 ; 

 breadth of brain-case on ridges 10 ; palatilar length 10"3 ; 

 palatal foramina 6 ; upper molar series 4'1. 



Hah. S.E. Bolivian lowlands. Type from San Antonio, 

 Parapiti, on 20° S., about 250 km. south of Santa Cruz de la 

 Sierra. Alt. 600 m. 



lyi^e. Adult male. B.M. no. 21. 11. 6. 12. Oriuinal num- 

 ber 75. Collected 7th Februar}^ 1921, and presented by the 

 Marquis de Wavrin. 



This very distinct little species, found in company with, 

 and almost mistakeable for, Mus muscuhis, is represented in 

 the Marquis de Wavrin's collection by four skins and two 

 extra skulls. Tiie species is readily recognizable by its com- 

 paratively dark colour. 



"Trapped in a house surrounded by bush." — IF. 



Galea hoUvie/isis demissa, subsp. n. 



General essential charactei'S as in true holiviensis of tiie 

 high Andean plateau, but the skull witii certain differences 

 in detail. 



Skin no doubt as usual, but no specimen has been sent. 



Skull longer and proportionally narrower than in boUciensis, 



