. Nature sketches in temperate America, a series of sketches and a popular account of insects, birds, and plants, treated from some aspects of their evolution and ecological relations . wingof the locust. The egg thus placed is out of the way of the host,and it later hatches out in a grub, which eats its way into thefatty parts of the locusts body, thus disabling and finallykilling its helpless victim. I have also seen Diptera of thiskind following the Carolina locust through the air. Theseflies pass so swiftly that I had to be on the keenest lookouteven to see them. When they catch up with th
. Nature sketches in temperate America, a series of sketches and a popular account of insects, birds, and plants, treated from some aspects of their evolution and ecological relations . wingof the locust. The egg thus placed is out of the way of the host,and it later hatches out in a grub, which eats its way into thefatty parts of the locusts body, thus disabling and finallykilling its helpless victim. I have also seen Diptera of thiskind following the Carolina locust through the air. Theseflies pass so swiftly that I had to be on the keenest lookouteven to see them. When they catch up with the locusts, theymay be seen, under favorable conditions, hovering about itsbody for the brief space of time they ar„e within view, whichsometimes is only for a fraction of a second. The eggs of the varied-wing hatch in the spring; the youngmaturing about the middle or the latter part of July. Theadults live until the advent of very heavy frosts in the found them frequenting open dry woodlands, stubble fields,meadows, and pasture lands. About September first, I findthat after half-past four oclock in the afternoon, these locusts. ECOLOGY-INTERPRETATION OF ENVIRONMENT 353. A pair of Varied-irmg Lociififs- {.irpliia .). Upperfigure, male with spread wings; lower figure, female. Themale had yelloio, the female salmon-colored wings in species is often parasitized hy a gray Tachinafly which deposits its eggs on the living indi-vidual while it is in flight. The locustsegys are laid in late July and earlySeptember. 354 NATURE SKETCHES IN TEMPERATE AMERICA like most of the neighboring Acridians, do not rise so readilyfrom the ground as they do in the middle hours of the day, andafter five oclock they all go to rest for the night. The dis-tribution of this species extends throughout the greater partof the region east of the Rocky Mountains. The scientificname of this locust is Arphia xanthoplera. Blatchleys Locust In the account of the green-legged locust, I
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