A COLONY of tree shrews, Tupaia glis (Diard), has been maintained at the University of Malaya for the past nineteen months, specimens having been obtained both from the Federation of Malaya and from Thailand. A total of fifty-five living animals has been received; the colony at the time of writing includes thirteen males and fourteen females. After heavy mortality in the early stages of the work, the death-rate dropped to a point where most of those animals surviving the first three months tend to live for at least a year.