The oponinss of the beerows ore usunily opon under clus Gf buach gross or sago. ’ . . wetanye ae Jan Cseasienally thoy avo found under ese ap erag tantly Dn rocis, Slaks of concvote or rubble. le we Ae yet . fa Vw . = runs extend bpotwosen the oponings te 2 an he ease Gf ws eotserens ~ Vn boares, 9 ves _ eatene In all eases, wallemavkcd « ae the wurvows. 1. Pm for bunen grass, will setnnliy burrow ¢theorvgh tho bunch grass. vsonaliy shallow, G to Tf inmehos in Cepta, “a ay tho runs The burrors ore Altnovgu they may co No observations have bean mace in this siuly on the + 3 aber of litters por year per femalo cince di vould involve keeping the fomales in captivity, nor on thea length of gestnticna i per Lo of these rats. in other sypoeiss as woll as closely allioa spocies, the gcstation poriod is apnpronimately 22 days. Since we know the instonce of pregnancy in the females is around 18.5 par eent, thero snould be on the average S&S litters por year par femnale. Breeding is continuous throvghout the yoar althouzh there 4S a greator tendency for an increase in numbor of females pros- nant during the sumznertine. Contrary to the conditions for more rocents in povulations studied for ecoloyleal roasons, this has fo no ectovarasites--has cnly tvo endoparasitcs soon thus far, and these are tanevorms end kookworuws.