The Diapriidae

face or entire head (often also mesoscutum or syntergite) with dense, fine, semiappressed pilosity (figs. 93, 94); antennal shelf between toruli not developed, space rounded; distance between toruli larger than or subequal to distance between torulus and inner orbit (fig. 93); frenal gutter of forewing sharply angular (fig. 94); female antenna 11-segmented; aquatic in habits; Neartic and Neotropical [mf]

face or other parts of body glabrous or with only a few scattered long hairs or bristles; antennal shelf between toruli sharp, carinate; distance between toruli subequal to or shorter than distance between torulus and inner orbit; frenal gutter of forewing not angular; female antenna predominantly 12-segmented; only a few aquatic species