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Page 92, line 16, for "1901" read "1921." Table 4, facing page 104, top of "parents" column for "Stock14 ♀ ♀ × stock 3 ♂♂" read "stock 3 ♀♀ × stock 14

H. K. Townes in his Nearctic Species of Tendipedini (1945) describes 201 species of this group found in North America. His revision considers only the adults. It is the object of the present study to list the species of Tendipedinae taken in Iowa together with notes on the immature stages and their biology. The present paper covers six of Townes' genera. It is significant that, while he describes 67 species belonging to these same genera, descriptions of the immature stages of only about eight of them are found in the literature. Sixteen of his 67 species are listed below as having been taken in Iowa, and though these include the very common ones the life histories of only four of them are known. The present paper adds four more descriptions of larvae and pupae. The data presented were accumulated over a period of seven years and the specimens are in the St. Ambrose College collection at Davenport. It is assumed that the reader has access to Townes' monograph (1945) and since his list of references is exhaustive a repetition of them under each species here is deemed superfluous.