| abstract | 1. The collections reported were made in central and north central Ohio during the period 1952 to 1957. Nineteen species are recorded representing 12 genera in 11 families. Four species are new: Hydrachna baculoscutata, Hydryphantes waynensis, Torrenticola bittikoferae, and Piona napio.
2. An annotated list is included, naming 11 species previously reported from Ohio, which have not been recognized among material collected in this survey.
3. Developmental and life history observations have been recorded. Immature stages have been reported when they could be correlated with adult forms.
4. Host insects are indicated for Hydrachna magniscutata, Thyas stolli, Limnesia undulata, and Piona reighardi.
5. Morphological details of all identified forms are illustrated.
6. Collecting apparatus and techniques used by the writer are described and evaluated. |