Key to the females of the Dryininae species of Japan

1 Palpal formula 6/3......................................................................................................................................................... 2

- Palpal formula 5/3 ( Pseudodryinus) .............................................................................. P. s h i h o a e Mita, New Species

2 Antenna with tufts of setae; enlarged claw with two subapical teeth ( Thaumatodryinus) ................... T. alienus Olmi

- Antenna without tufts of setae; enlarged claw with one subapical tooth ( Dryinus) ................................................... 3.

3 Frons smooth; occipital carina incomplete; body testaceous......................................................... D. indicus (Kieffer)

- Frons covered with more or less distinct surface sculpture; occipital carina complete; body mostly black ............... 4

4 Frons strongly reticulated, rugose........................................................................................ D. chenae Xu, Olmi & He

- Frons smooth, granulated, with or without longitudinal carina.................................................................................... 5

5 Frons narrow, narrower than scutellum ............................................................................................... D. bellicus Olmi

- Frons broad, much broader than scutellum................................................................................................................... 6

6 Occipital carina laterally strongly sinuate; temple long, distance longer than greatest diameter of anterior ocellus (Figs. 2, 3) ..................................................................................................................................................................... 7

- Occipital carina laterally straight or weakly sinuate; temple short, distance shorter than greatest diameter of anterior ocellus (Figs. 1, 4)......................................................................................................................................................... 8

7 Frons strongly granulated (Fig. 2) ................................................................................................. D. pyrillae (Kieffer)

- Frons weakly or not granulated (Fig. 3) ...................................................................................... D. pyrillivorus Olmi

8 Frons with numerous longitudinal keels (Fig. 4) .......................................................................................................... 9

- Frons without longitudinal keel (except frontal line) (Fig. 1) .................................................................................... 10

9 Antennae with FIV–VI flat, strongly broadened ........................................................................... D. browni Ashmead

- Antennae with FIV–VI cylindrical, not broadened .............................................................................. D. sinicus Olmi

10 Frons weakly excavated (Fig. 1)........................................................................................ D. krombeini Ponomarenko

- Frons strongly excavated (as Fig. 3)................................................................................. D. expolitus Xu, Olmi & He