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Posts tagged “stridulation

Crickets Courting, Mating & Laying Eggs

10-10-14 cricket  003In late summer and autumn, crickets court by rubbing their forewings together, a practice referred to as stridulation. At the base of each forewing is a specialized vein with a series of hard “teeth,” or ridges – the “stridulatory file.” Only one is fully functional, and in crickets, it is usually the one on the left wing. On the inner, lower edge of the right forewing is the “scraper,” a sharp, hard projection that rubs against the file when the cricket opens and closes its wings during stridulation. In most species,it is the male crickets that “sing,” but both sexes have “ears,” or tympana, on their front legs. After mating, the female cricket deposits her eggs in the soil or in plant tissue, depending on the species. (Photo: female field cricket- note long ovipositor at tip of abdomen between the two sensory organs called cerci, which is lacking in male crickets)

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Grasshoppers Courting, Mating & Laying Eggs

8-20-14 mating grasshoppers 040It’s that time of year again, when grasshoppers are courting, mating and laying eggs that will overwinter and hatch next spring. In addition to adopting different poses and flashing brightly-colored wings, male grasshoppers attract females by producing calling songs. (Some females also produce sounds, but they are usually infrequent and very soft.) The males rub their hind femur against a forewing, or rub a forewing against a hind wing in order to make their calls, a process called stridulation. Tympana, or eardrum-like structures on their abdomen, allow both male and female grasshoppers to hear. Because the songs are species-specific, females can readily identify males of the same species.

After pairing up, the smaller male grasshopper usually mounts the female and the female curls her abdomen up to reach the male’s reproductive organ (aedeagus) from which she receives a package of sperm called a spermatophore. The mating process can take from 45 minutes to more than a day, depending on the species. The small, pointed structures that you see at the tip of the female’s abdomen are her ovipositors, with which she deposits her eggs in the ground.

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