Provisional Key to Togoperla Males

1 Hemitergal process forward of basal callus about as long as callus (Fig. 2) ……….………………... 2

1’ Hemitergal process forward of basal callus distinctly longer than callus (Fig. 8) …………… 5

2 Wings hyaline; terga 6‐9 with brown mesal sclerite …………………………..…….…. noncoloris

2’ Wings mostly dark brown except for pale costal area …………………………………………….….. 3

3 Tergum 9 with a black mesal sclerite, T 6‐8 without sclerite …………………….…… totanigra

3’ Tergum 9 without mesal sclerite …………….… 4

4 Legs uniformly pigmented except for narrow dark apical femoral band …………………. tricolor

4’ Legs banded, femora and tibiae dark basally and at apex, but with mesal yellow band … canilimbata

5 Femora without conspicuous banding.……….. 6

5’ Femora with conspicuous banding ……………... 7

6 Basolateral lobes of aedeagal tube armed with spines (Fig. 25); known from Japan ………. limbata

6’ Basolateral lobes of aedeagal tube without spines (Fig. 48); known from Thailand …….……… shan

7 Tibiae and femora with conspicuous black and yellow bands …….……………………….……… 8

7’ Tibiae without pigment bands ………………… 9

8 Basolateral lobes of aedeagal tube covered with fine spines (Fig. 36); head yellow brown around dark ocellar area …………………………. perpicta

8’ Basolateral lobes of aedeagal tube without spines; head brown around ocellar area ……… triangulata

9 Hemitergal lobes slightly swollen at tips in lateral aspect (Fig. 14); terga 6‐9 with mesal sclerite (Fig. 8); dorsal aedeagal armature extends to near basolateral lobes and covers surface of lobes (Fig. 12) …………………………………………… clavata

9’ Hemitergal lobes more nearly acute in lateral aspect (Fig. 18); terga 6‐9 without mesal sclerite; dorsal aedeagal armature does not approach bare, basolateral lobes …………………………….….. 10

10 Everted aedeagus a more or less straight cylinder in lateral aspect (Fig. 17); dorsolateral armature connected to ventral armature in a slanted line of spines; known from southwest China ….. fortunati

10’ Everted aedeagus sinuate in lateral aspect (Fig. 43); dorsolateral armature strongly excavated leaving a large lateral bare area (Fig. 42); known from Vietnam ………………………....…. poilanina