. Bulletin. Geography. LOW PRAIRIE 285 sawfly (Fig. 287), which is very abundant in early June. Associated with this are many caterpillars (174). The greasy cutworm {Agrotis ypsilon Rott.) feeds upon the strawberry. The army worm (Lucania unipunda Haw.) feeds upon a variety of plants, and several of its near relatives occur. The larvae of the salt-marsh caterpillar {Estigmene acraea) (Figs. 290, 291), the yellow bear (Diacrisia virginica Fab.) (Fig. 292), hedgehog caterpillar {Isia Isabella S. and A.), and Apantesis phalterta Harr. are common. Of the Orthoptera, Xiphidiiim fascia turn and the
. Bulletin. Geography. LOW PRAIRIE 285 sawfly (Fig. 287), which is very abundant in early June. Associated with this are many caterpillars (174). The greasy cutworm {Agrotis ypsilon Rott.) feeds upon the strawberry. The army worm (Lucania unipunda Haw.) feeds upon a variety of plants, and several of its near relatives occur. The larvae of the salt-marsh caterpillar {Estigmene acraea) (Figs. 290, 291), the yellow bear (Diacrisia virginica Fab.) (Fig. 292), hedgehog caterpillar {Isia Isabella S. and A.), and Apantesis phalterta Harr. are common. Of the Orthoptera, Xiphidiiim fascia turn and the 2-lined locust (Melano- plus biviUatus), the red-legged locust {Melanoplus femur-rubrum), and the short-winged brown locust {Stenobothrus curtlpennis) (Fig. 293) are most Fig. 292.—^The yellow bear: a, larva; /), adult {Diacrisia virginica Fabr.); nat- ural size (after Forbes). Fig. 293.—-The short-winged brown locust {Stenobothrus curtipennis) (after Lugger). On the flowers are many flower-frequenting flies, viz., Sparnopolius flavins Wied., Asilus sp., Syritla pipiens Linn., Coenosia spinosa Walk., Paragus angiistifrons Loew., Pachryrhina ferruginea, and Helophilus conostoma Will. Preying upon the various insects are the mud-dauber wasp (Scelipron cementarius) and the digger-wasp {Ammophila nigricans). Parasites, such as Ichneumon zebratus, Paniscus gemminatus, Epeolus cressonii, etc., occur upon the plants, and certain of them are often found engaged in depositing eggs in or on caterpillars. The onion-fly (Tritoxa flexa) (190) is striking because of its black body and black wings, obliquely marked with white. Spiders, especially crab spiders, are abundant. The white Misumena vatia occurs on the milkweed and the flowers of the mint. Epeira trivittata and the long-bodied spider (Tetragnatha laboriosa) occur on the blossoms and stems of various Please note that these images are extracted from scanned page images that may have been digitally enhance
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