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The localization and movements of four nuclear proteins, originally contained in the germinal vesicle ofXenopus oocytes, were followed through early development from cleavage to late neurula. The study made use of monoclonal antibodies directed against germinal vesicle proteins. Biochemical methods showed that all proteins persist in the embryo without a change in molecular size or gross concentration. At early stages the proteins are localized preferentially in the cytoplasm of the animal hemisphere. They shift from the cytoplasm to the nucleus at stages specific for the individual proteins. During mitosis the proteins are released from the nucleus into the cytoplasm.

The night resting sites of Glossina palpalis palpalis (R.-D.) were observed in a riverine swamp at Bara, Bauchi Emirate, northern Nigeria. The flies were marked with an ultra violet reflecting paint and released at dusk. They were detected with the aid of an ultra violet light beam. Most of the flies (72%) rest on leaves (50% on the upper sides) and on small twigs and creepers (202%). The average resting height was highest in the mid-rains (3-78 m), dropped in the late rains (2-95 m) and was lowest (1-52 m) in the dry season.The resting site heights ranged from ground level up to 18 m. Females were found to rest slightly higher than males and when the moon shone both sexes had a tendency to perch higher. It was shown that the night resting behaviour of G. palpalis is favourable to the application of residual insecticide deposits from the air because most of the spray drops are deposited on leaves.

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