LIFE-HISTORY AND LABORATORY REARING OF HYDROMETRA-HUNGERFORDI TORRE-BUENO (HETEROPTERA, HYDROMETRIDAE) WITH DESCRIPTIONS OF IMMATURE STAGES

The life history of Hydrometra hungerfordi Torre-Bueno was investigate d in southern Illinois during April-November 1992 and 1993, and the im mature stages were described. The bug was reared from egg to adult und er controlled laboratory conditions. This apparently bivoltine species occurred along the stream banks on the water surface, root mats, and floating detritus. Adults overwintered in leaf litter and became activ e in April. Eggs were found in May, June, and July above the water lev el in root mats, tree snags, and associated detritus along the stream bank. Seasonal occurrences of adults and nymphs are discussed. Adults were last observed in early November. This species was reared under a 16L:8D photoperiod and 28 +/- 1 degrees C. The incubation period avera ged 8.81 days. Durations of the five nymphal stadia averaged 2.52, 2.4 8, 2.68, 3.39, and 4.68 days, respectively.