Although the breeding range of Myotis sodalis remains a mystery, bat collecting in Indiana during the past decade has shed some light on its summer distribution. Lyon (1936) recorded the species from only Crawford (Wyandotte Cave, the type locality), Greene and Knox counties. Some of these were June and August specimens, but no mention was made of this fact. This may have been because sodalis was then so little known, having been described a short time previously by Miller and Allen (1928). Kirkpatrick and Conaway (1948) published a record of a female (Purdue Wildlife Laboratory Coll. 366) taken May 13, 1947, at Lafayette, Tippecanoe County. We have examined recent specimens from Clay, Kosciusko, Lawrence, Monroe, Montgomery, Parke, Steuben, Tippecanoe, Washington and Wayne counties. With the exception of the Lawrence and Monroe county records (which are for the wintering period) these additional localities from which sodalis has been taken are of considerable interest. Due to the paucity of published records for sodalis in summer, we have included all of …