In the course of reviewing the Psenine wasps, it has become apparent that the names of several Nearctic species are homonyms or incorrect. These are discussed briefly and renamed below.

The first records of Odonata from Maine are given by Hagen (1861), who mentioned five species as occurring in the state. In a few later papers (Hagen, 1873, 1874, and 1875, and Walsh, 1863) additional species were recorded from Maine, bringing the total to 27 in 1875.

Banks distinguished Cressochilus from other genera by its having a somewhat acute marginal cell and the apical margin of the clypeus biconcave. In the females the biconcave margin of the clypeus may be very weakly indicated, but in the males it is usually stronger, there being often a well-marked median tooth.

During July, 1943, a number of wild and cultivated plants in the Blackwell district, near Sarnia, Ontario, were examined for parasitic nematodes. Wild host-plants of the sugar-beet nematode, Heterodera schachtii Schm., recorded in a note in the Canadian Entomologist of October, 1941, were again noted, and one new host record was obtained for this nematode in Canada.