Key to the Onycholyda species of the Russian Far East and Korea

1 (a) Females. ... 2

– (aa) Males. … 9

2(1)

(a) All terga black, at most with narrow posterior margin pale, without orange areas. ... 3

– (aa) Some terga largely orange… 6

3(2)

(a) Fore, mid and usually hind femora largely marked with black.

(b) Head with clypeus widely yellow medially and frons almost entirely black (Fig. 4: 3b). … O. viriditibialis, p. 66

— (aa) Femora entirely pale yellow or greenish yellow.

(bb) Head color pattern different (Fig. 4: 4a, b–5aa). … 4

4(3)

(a) Anterior margin of clypeus pale yellow (Fig. 4: 4a, b).

(b) Median ocellus surrounded by large pale yellow mark (Fig. 4: 4a, b).

– (aa) Anterior margin of clypeus with obscure pale yellow spot at middle or entirely black (Fig. 4: 4aa, bb, 5aa).

(bb)Pale yellow mark around median ocellus small, broken into four spots, posterior pair sometimes missing (Fig. 4: 4aa, bb, 5aa).

(cc) Clypeus dull, with distinct surface microsculpture. … 5

5(4)

(a) Head color pattern Fig. 4: 4aa, bb (5a); pale yellow spot present on or behind facial crest.

(b) Trochanters pale.

– (aa) Head color pattern Fig. 4: 5aa; pale yellow spot on facial crest usually missing.

(bb) Trochanters mostly black.

(cc) Sterna (3–) 4–6 entirely black, or with very narrow posterior margin pale yellow. … O. yezoensis, p. 67

6(2) (a) Mesoscutellum and metascutellum mostly or entirely black [in Chinese specimens mesoscutellum usually yellow marked]

(b) Wings distinctly yellowish, with veins mostly orange to pale brown.

– (aa) Mesoscutellum and metascutellum yellow.

(bb) Wings not distinctly yellowish, with veins mostly blackish brown.

(cc) Head color pattern different (Fig. 4: 7a, b; 8a; 8aa); left mandible tridentate (small median tooth present, Fig. 4: 7a, b). … 7

7(6)

(a) Clypeus entirely black (Fig. 4: 7a, b), or with lateral parts and narrow anterior margin brownish. … O. nigroclypeata, p. 64

– (aa) Clypeus anteriorly largely pale yellow (Fig. 4: 8a; 8aa). … 8

8(7)

(a) Head color pattern as in Fig. 4: 8a.

(b) Abdominal tergum 3 usually entirely orange. … O. sertata, p. 65

– (aa) Head color pattern as in Fig. 4: 8aa.

(bb) Abdominal tergum 3 usually with large black marking. … O. kumamotonis, p. 64

9(1)

(a) Fore, mid and sometimes hind femora marked with black (Fig. 5: 9a). … O. viriditibialis, p. 66

– (aa) All femora entirely pale yellow (trochantelli may be black marked). … 10

10(9)

(a) Clypeus nearly flattened or with cup-shaped area medially, frontoclypeal crest absent ventrally (Fig. 5: 10a). … 11

– (aa) Clypeus with entire frontoclypeal crest, medially divided into lateral halves (Fig. 5: 10aa). … 14

11(10)

(a) Mesothorax below wings, including pectus, mostly or entirely pale yellow (Fig. 5: 11a).

(b) Left mandible bidentate (median tooth absent) (Fig. 5: 10a (11b)).

– (aa) Mesothorax below wings darker, at least pectus mostly or entirely black.

(bb) Left mandible tridentate (median tooth present, Fig. 5: 11bb).

(cc) Wings not distinctly yellowish or brownish, veins mostly dark brown to blackish brown. … 12

12(11)

(a) Abdomen with orange areas. … O. kumamotonis, p. 64

– (aa) Abdomen without orange areas. ... 13

13(12)

(a) Antennal scape completely yellow (Fig. 5: 13a).

(b) Mesoscutellum and metascutellum usually entirely black. … O. zinovjevi, p. 67

– (aa) Antennal scape yellow, outer surface with black patch (Fig. 5: 13aa).

(bb) Mesoscutellum and metascutellum pale yellow. … O. armata, p. 63

14(10)

(a) Abdomen with terga 4 and 5 orange (Fig. 14a). … O. nigroclypeata, p. 64

– (aa) Abdominal terga entirely black or with only tergum 4 orange. … 15

15(14)

(a) Stigma with basal 1/4 pale yellow (Fig. 5: 15a).

(b) Body length 7–9 mm.

– (aa) Stigma with basal 1/3 pale yellow (Fig. 5: 15aa).

(bb) Body length 9–12 mm.

(cc) Abdomen often with tergum 4 orange. … O. sertata, p. 65