The material on which the following report is based was received by the Imperial Bureau of Entomology some months ago, but without any note as to the host attachment of the examples forwarded or any other indication of their special importance. For this reason the two species of Chalcids recorded below remained unworked for some time. A more recent letter from Dr. J. J. Simpson disclosed the interesting fact that both had been bred from puparia of Glossina; and although I am unable at present to deal fully with them, it seems advisable to publish some notes and a preliminary description of one species which seems certainly new.