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Introduction and acknowledgments
Life cycle during the period of the observations
Morphological characters of adults
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6th instar Acrididae adults Aeschynomene band belt burnt bush fringe cages clumps concentration of locusts counts Cynodon-Cyperus zone dense density deposited developed Diplachne zone dry season E/F ratio egg packages elytra escarpment extent factors favourable feet females final moult flight flood plain grass green hoppers gregarious phase ground habitat hygrometer Hyparrhenia zone inches incipient swarming indicated instar hoppers Kalumbaleza Kavu Konongo Lake Rukwa large numbers larvae locust population Locusts flushed locusts were seen Mazabuka Michelmore Milepa plain morphological characters movement natives numbers of locusts observation area outbreak area outbreak centre oviposition patches period phase gregaria probably pronotum rains red locust relative humidity river Rukwa valley Rungwa scattered seems sexual dimorphism shallow lake slope solitary phase species specimens Sporobolus Sumbawanga tall grass tall vegetation temperature thorn tree table tion traverse line Ufipa plateau unburnt vegetation types vicinity waterfall table weather conditions wing length yards yellow young hoppers