. Bulletin. Natural history; Natural history. HEBARD: DERMAPTERA AND ORTHOPTERA OF ILLINOIS 131 taken quite readily to pastures, abandoned grassland, roadsides and the like. The more abundant prairie grasshoppers include Syrbula admirnbilis, Hip- pisciis ruffosus, Encoptolophus sordidus and Jrpliia sulphurea. The latter is frequently the dominant grasshopper in dry, well grazed pastures. The conehead Neoconocephalus ensiger occurs locally on long grass prairie. The meadow katydids seem to show a preference for moist and weedy situations. Sand areas.—More than any other factor, the pure sand ar
. Bulletin. Natural history; Natural history. HEBARD: DERMAPTERA AND ORTHOPTERA OF ILLINOIS 131 taken quite readily to pastures, abandoned grassland, roadsides and the like. The more abundant prairie grasshoppers include Syrbula admirnbilis, Hip- pisciis ruffosus, Encoptolophus sordidus and Jrpliia sulphurea. The latter is frequently the dominant grasshopper in dry, well grazed pastures. The conehead Neoconocephalus ensiger occurs locally on long grass prairie. The meadow katydids seem to show a preference for moist and weedy situations. Sand areas.—More than any other factor, the pure sand areas of Illi- nois are responsible for the occurrence within the state of many interesting. Fig. —Portion of cattail swamp. The cattails are the habitat of Truxalis brevicornis. The grasses around the habitats contain species of ConocephaUis and Orchelimum, in addition to some of the rarer grasshoppers. species of grasshoppers. There are several large sand deposits in Illinois. Those along the Mississippi river at Hanover, Savanna and Oquawka, and at Havana, fig. 2, Beach and Dixon, contain considerable bare sand with many blow-outs and dunes. Those at Amboy, Kankakee and especially Winnebago are covered mostly with black oak woods. Those with the greatest amount of free sand display the more interesting fauna. Bare sand is seemingly the sole habitat of Trimerotropis maritima interior, which is practically the only Illinois species so restricted. The commoner grasshoppers of the sparsely covered sand ridges are Melanoplus angustipennis and M. flavidus, Ageneotettix deorum, Spharagemon collare and Psinidia fenestralis. The ridges with taller and thicker cover usually have an abundant population of Schistocerca alutacea in addition to some of the others mentioned, and frequently some of the grassland species, such as Syrbula admirabilis. The Havana sand area along the Illinois river is the most extensive in the state. It has large tracts of bare or sparsely covered sand, in
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