. Bulletin of the Department of Agriculture. Agriculture. JO seconds pause First egg laid lot 14 liaet egg laid 10:29 last egg laid JO seconds pause 2 minute pause O <^ leet egg laid female wandered 1 minute paiuee first egg laid First egg laid 9j55 Last egg laid lOtO^ 1 minute pause Fig. 6.—Diagrammatic drawings showing the procedure in oviposition oi Alenrocant^us woglumi. In laying eggs (fig. 6) the female usually starts at what becomes the center of the spiral (although the inverse of this has been observed) and facing outward begins a series of nervous v
. Bulletin of the Department of Agriculture. Agriculture. JO seconds pause First egg laid lot 14 liaet egg laid 10:29 last egg laid JO seconds pause 2 minute pause O <^ leet egg laid female wandered 1 minute paiuee first egg laid First egg laid 9j55 Last egg laid lOtO^ 1 minute pause Fig. 6.—Diagrammatic drawings showing the procedure in oviposition oi Alenrocant^us woglumi. In laying eggs (fig. 6) the female usually starts at what becomes the center 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 against the leaf and lays an egg, there being a noticeable contraction of the abdomen as the egg is expelled. During this oviposition the costal margins of the forewings rest against the surface of the leaf and serve to steady the female. The entire time for the deposition of a single egg including the shaking movement is usually from 15 to 30 seconds but sometimes takes as long as one or two minutes. After laying an egg the female moves forward a little, one-half the length of her body or more, and repeats the operation. When she has laid from 3 to 5. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Department : Supt. of Docs. , Govt. Print. Off.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
