An associational study of Illinois sand prairie . inois sand re-gion. Sinea diadema Fab. June 20, July 19, October 6,7. A large and powerful reduviid, which preys upon a variety of in-sects. It is usually found in plants or flowers. Taken at theDevils Hole in bunch-grass and in blov/ sand. Tl^ey have been takenon Kuhnia, and on Cassia, v/here one was seen eating a lady bird, Coc-cinella 9-notata. A very v/idely distributed species, from the plainsto the Atlantic border. Common in many habitats. Reduviolus ferus Linn. April 8. Probably our commonest nabid. The insects feed upon small in-sects,
An associational study of Illinois sand prairie . inois sand re-gion. Sinea diadema Fab. June 20, July 19, October 6,7. A large and powerful reduviid, which preys upon a variety of in-sects. It is usually found in plants or flowers. Taken at theDevils Hole in bunch-grass and in blov/ sand. Tl^ey have been takenon Kuhnia, and on Cassia, v/here one was seen eating a lady bird, Coc-cinella 9-notata. A very v/idely distributed species, from the plainsto the Atlantic border. Common in many habitats. Reduviolus ferus Linn. April 8. Probably our commonest nabid. The insects feed upon small in-sects, usually immature stages. Common in herbaceous growth; it isoften found taking shelter under logs. A Devils Hole specimen wastaken on the sand in bunch-grass. The species ocfcurs over practical]^the entire United States; it is also widely distributed in Europe. Adelphocoris rapidus Say (Calocoris Fieber). October S. Found in bunch-grass sv/eepings v/ith the following species, \tiichit resembles closely in habits. Very common in black soil prairie. 101 and in cultivated fields, but rare in sand prairie. Widely diatri-buted. Lygus pratensis Linn. October 6, 8, April 1. A very conmon and v/idely distributed capsid. These insects areplant feeders exclusively. Taken at the Devils Hole on Kuhnia andin bunch-grass sweepings. The species is very much less coimnon insand prairie than in cultivated fields and in black-soil prairie. Poecilocapsis lineatus Fab. June 20. Taken in cultivated field on plants. Habits similar to thoseof Adelphocoris and Lygus: the species is not so common, however. Phymata fasciata Gray (wolfii Stal). July 23, 29. The common ambush bug; frequently found in flowers, lying inwait for insect prey, which is seized and held by the pov/erfully cb-veloped front legs. An insect primarily of open places and forestmargins. Taken on Pycnanthemum. at the edge of v;oods near MatanzasLake. One specimen from the Devils Hole, on Cacalia. Rare in sandprairie. This species is of
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