An associational study of Illinois sand prairie . fence-rov/s, and dry grassy situ-ations. JJot a typical bunch-grass species. Its range is UnitedStates east of Great Plains. (Scudder) Ivlelanoplus femur - rub rum De Geer, July 23, April 4. Common along roadsides and in cultivated fields. Totallywanting in bunch-grass or blov/sand. iiound only v;here a certainacount of humus and clay occurs in the soil. All suiiimor. This isthe commonest Uelanoplus in northern Illinois prairies. In thesand-prairie it is replaced by M. angustipennis. Melanoplus angustipennis Dodge. July 19, October 8. This is t
An associational study of Illinois sand prairie . fence-rov/s, and dry grassy situ-ations. JJot a typical bunch-grass species. Its range is UnitedStates east of Great Plains. (Scudder) Ivlelanoplus femur - rub rum De Geer, July 23, April 4. Common along roadsides and in cultivated fields. Totallywanting in bunch-grass or blov/sand. iiound only v;here a certainacount of humus and clay occurs in the soil. All suiiimor. This isthe commonest Uelanoplus in northern Illinois prairies. In thesand-prairie it is replaced by M. angustipennis. Melanoplus angustipennis Dodge. July 19, October 8. This is the most abundant and most characteristic locustin the bunch-grass. Common throughout the sand region, from Julyuntil frost. Angustipennis is a western species, and was formerlyquite rare, but of late years has been increasing in numbers in thgwest. Its range is from Indiana to Montana and south through theplains region to Texas. This insect is the chief plant-eater in the Illinoissand-prairie, and is probably of greater importance in the associ-. ation than any other species. It is one of the very destructivespecies of the genus. It is found on hlov;sand and in the marginof blov/outs. Melanoplus differentialis Uhl. July 25. Common in flat sandy country and roadsides. Co-extansivwith cultivation, but very rare in the native hlov/sand or hunch-grass areas. Tv7o were found in the Devils Hole region just eastof the walnut grove, Ivlelanoplus bivittatus femoratus 3urm. July 25. Taken in tv/o places where the conditions indicated pre-sence of an advanced stage of sand-prairie—the first was a pas-ture near Llatanzas Lake, the second a small area east of the blackoak woods near Quiver Station. Scudderia tesensis July 12, July 19. The eggs of this katydid are inserted at the edge ofleaves. The adults are active from mid-July or earlier till of the katydids are arboreal, this species is not arboreal toany great extent. At the Devils Hole they are found in the bu
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