Herr Dr. E. McC. Callan, Senior Lecturer in Entomology an der Rhodes Universitï¿½t, Grahamstown, Sï¿½dafrika, sandte mir die hier beschriebene auffallende Hispine ein, die wegen der Dornenlosigkeit der Deckenscheibe in eine neue Gattung gehï¿½rt.
Field observations were made on hopper bands of the Red Locust (Nomadacris septemfasciata Serville) during the wet season from January to March 1957, in the Iku outbreak area, at the northern end of the Rukwa Rift Valley in S.W. Tanganyika. Published data on hopper behaviour and migration of bands in outbreak areas are meagre. Our observations were made specially to support investigations on aerial searching for hopper bands and on hopper control by treatment of infested places with wide lattices of persistent stomach poison. Band migration was studied in order to determine the mesh-size of the insecticidal lattice (Lloyd & Yule, in press).
Soft brown scale (Coccus hesperidum L.) has been known for many years in South Africa as a minor and usually rather localized pest of citrus. In certain areas where ants were particularly active, e.g. Letaba in the N. Transvaal, this scale together with red scale (Aonidiella aurantii Mask.), often became very abundant in the orchards.
According to Halcrow (1956), maximum pupation of Anopheles gambiae occurs between 5.00 p.m. and 7.00 p.m. in Mauritius. On the other hand, Shute (1956) states that in Tanganyika the pupation of this species mostly occurs in the afternoon, from about 1.00 p.m. tot 4.00 p.m. But neither author presents sufficient data to establish a definite diurnal periodicity in the pupation of this species.