By M. W. Service (auth.)
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Extra info for A Guide to Medical Entomology
Within a few hours ofemergence the external male genitalia starts to rotate and after about 12-24 hours it has turned through 180°: males are unable to mate with females before this rotation is completed. In unfed mosquitoes the abdomen is thin and slender, but after females have bitten a suitable host and taken a blood-meal (only females bite) the abdomen becomes greatly distended and resembles a red oval balloon. When the abdomen is full of developing eggs it is also dilated, but is whitish not red in appearance.
Pupae Breathing trumpets short and broad apically. Short peg-like abdominal spines on segments two or three to seven. Breathing trumpet short or long, opening not broad. No spines or abdominal segments three to seven. Adults (both sexes) Rest at an angle to any surface. In most species dark and pale scales on wing veins arranged in distinct 'blocks'. Rest with the bodies more or less parallel to the surface. Scales on wing veins not arranged in 'blocks', scales frequently all brown or blackish or a mixture of pale and dark scales scattered on veins.
1) Mosquitoes possess only one pair of functional wings - the fore wings, the hind wings are represented by a pair of small knob-like halteres. They belong to the suborder Nematocera of the order Diptera (table 2. I, p. 6). ) but they * Culex pipiens is a species complex: the tropical form is often called C. pipiensfatigans and this name has been used in this book to avoid confusion and introducing an unfamiliar name, although it has recently been established that more correctly the name C. quinquifasciatus has priority.