The natural history and pattern of growth of a streamdwelling chironomid, Paratendipes albimanus (Meigen), were studied in Augusta Creek, Kalamazoo Co., Mich. Collections of egg masses enabled observations of hatching and activity of larvulae. Significant anatomical changes occurred at the 1st molt and larval structures did not take their final form until the 3rd instar. Measurements of changes in larval dry weight revealed that the Augusta Creek population was univoltine, with a flight and oviposition period from late June to mid-July. P. albimanus had a rather complex pattern of growth, in which development was divided into 4 distinct periods. Brief periods of growth during the summer and fall left the overwintering population as a mixture of I and II instars, while growth phases in Apr. and June represented 99% of the final population biomass accumulation.