The Natural History of Flies |
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Page 3
... wings in the course of evolution ; how are we to recognize these ? Flies have adapted the second pair of wings , now disused for flight , into halteres , knobbed organs which act as gyroscopic stabilizers during flight , and which can ...
... wings in the course of evolution ; how are we to recognize these ? Flies have adapted the second pair of wings , now disused for flight , into halteres , knobbed organs which act as gyroscopic stabilizers during flight , and which can ...
Page 114
... wings over each other like a pair of scissors , and in that position the wings exactly covered the silvery stripe , so that the whole fly became dark , and quite incon- spicuous against a leaf . - Now this scissor - like closing of the ...
... wings over each other like a pair of scissors , and in that position the wings exactly covered the silvery stripe , so that the whole fly became dark , and quite incon- spicuous against a leaf . - Now this scissor - like closing of the ...
Page 198
... wings . The pattern of the wings is most intricate , and is displayed when the flies walk slowly about , raising and lowering the wings . As we have seen in , say , Sepsidae , this can have a part in courtship behaviour , but it is ...
... wings . The pattern of the wings is most intricate , and is displayed when the flies walk slowly about , raising and lowering the wings . As we have seen in , say , Sepsidae , this can have a part in courtship behaviour , but it is ...
Contents
THE PATTERN OF FLIES 3 | 3 |
THE LIFEHISTORY OF FLIES | 12 |
Part | 27 |
Copyright | |
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abdomen able actively adapted adult adult flies African already animals appearance aquatic areas attack attracted become birds biting blood body breed called carnivorous carried cause Chapter close common countries crane-flies developed difficult disease effect eggs emerge evolution evolved example eyes fact feeding female Figure flies flight flowers genera genus give gnats habit habitats head horse-flies host human insects interesting known larvae later leaves legs less live look males mass materials mating mentioned midges mosquitoes move natural nearly nests occur organic parasites particularly perhaps plants present prey primitive probably proboscis pupae recent rest robber-flies round seems seen similar skin soil sometimes species spiracles stage structure suck suggests surface swarms tion tissues tropical true usually vegetation wings