Figures 10.2


The life cycle of the mosquito Culex pipiens (Diptera: Culicidae):
Figures 10.2. The life cycle of the mosquito Culex pipiens (Diptera: Culicidae):

(a) adult emerging from its pupal exuviae at the water surface; (b) adult female ovipositing, with her eggs adhering together as a floating raft; (c) larvae obtaining oxygen at the wa ter surface via their siphons; (d) pupa suspended from the water meniscus, with its respiratory horn in contact with the atmosphere. (After Clements 1992)

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  A stonefly nymph (Plecoptera: Gripopterygidae) showing filamentous anal gills.
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  A male water beetle of Dytiscus (Coleoptera: Dytiscidae) replenishing its store of air at the water surface.