In pursuing my studies of the genital armature of the tsetse-flies, I have been fortunate in securing some valuable and interesting material from various parts of the African continent which has enabled me to offer a further contribution on the specific characters of the recently discovered Glossina austeni , Newst., from British East Africa; to present a detailed account of the armature of the apparently rare G. fuscipleuris , Aust., and to clear up some doubtful points in regard to the structural details of the male genital armature in G. longipennis , Corti. Later I hope to be able to offer some further remarks on G. palpalis , R.D., especially in regard to the colour and structural variations existing in this species. Meanwhile I may here state, for the guidance of the student, that G. fuscipes , Newst., which was described by me as a distinct species, must sink as a well-marked race of G. palpalis .
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R. Newstead (1912) studied this question.