The black fly of citrus and other subtropical plants . First egg laid10:14 I*st egg laid 10:2? y^ Iminute pause \jo seconds pauselast egg laid 2 minute pause First egg laid9:55 Last egg laid 10:05 last egg laid female wandered away, 1 minute pause first egg laid Fig. •1 minute pause -Diagrammatic drawings showing the procedure in oviposition of Aleurocanthus woglumi. In laying eggs (fig. 6) the female usually starts at what becomes thecenter of the spiral (although the inverse of this has been observed)and facing outward begins a series of nervous vibrations and contrac-ti
The black fly of citrus and other subtropical plants . First egg laid10:14 I*st egg laid 10:2? y^ Iminute pause \jo seconds pauselast egg laid 2 minute pause First egg laid9:55 Last egg laid 10:05 last egg laid female wandered away, 1 minute pause first egg laid Fig. •1 minute pause -Diagrammatic drawings showing the procedure in oviposition of Aleurocanthus woglumi. In laying eggs (fig. 6) the female usually starts at what becomes thecenter of the spiral (although the inverse of this has been observed)and facing outward begins a series of nervous vibrations and contrac-tions. After from one to four such contractions and a rocking back-ward and forward she suddenly thrusts the end of her abdomen againstthe leaf and lays an egg, there being a noticeable contraction of theabdomen as the egg is expelled. During this oviposition the costalmargins of the forewings rest against the surface of the leaf and serveto steady the female. The entire time for the deposition of a singleegg including the shaking movement is usually from 15 to 30 secondsbut sometimes takes as long as one or two minutes. After laying anegg the female moves forward a little, one-half the length of her bodyor mo
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Keywords: ., bookcentury1900, bookdecade1920, bookidblackflyofci, bookyear1920
