Key to species of Apochrysa Schneider

1. Hind wing with distinct ovoid marking along inner gradate series located approximately midway along wing (Figs 9C, 11), posterior margin of hind wing with suffuse infuscate shading distally, or at least venation in this region darker than rest of wing (Figs 9C, 11); hind wing inner-most gradate series with distinct sigmoid shape (Figs 9C, 11) (Afrotropical).............. 2.

- Hind wing with or without wing marking along inner gradate series (Fig. 10), posterior margin of hind wing hyaline with venation concolourous with rest of wing, lacking darker suffusion (e.g., Figs 6, 10 A-B); hind wing inner gradate series with slight curve or distinctly bent midway (not recurved with sigmoid shape) (e.g., Figs 9 A-B, D, 10) (Oriental, Australasia, Oceania and eastern Palaearctic).................................................................................... 4.

2. Forewing RP with cross-veins irregularly arranged in basal part of wing, three gradate series present (e.g., Figs 9C, 11B).. 3.

- Forewing RP without irregular cross-veins in basal part of wing, two gradate series present (Fig. 11A) (Afrotropical)......................................................................................... A. voeltzkowi (Weele) .

3. Hind wing with two gradate series present (Fig. 11B) (Afrotropical)............................... A. wagneri Hölzel.

- Hind wing with three gradate series present (Fig. 9C) (Afrotropical)............................. A. leptalea (Rambur) .

4. Forewing with one or more irregularly distributed cross-veins interconnecting some RA-RP cross-veins; RP branches with extensive irregular cross-veins and inner gradate series absent, only outer gradate series present in forewing (Fig. 10A) (China, Japan, India)..................................................................... A. matsumurae Okamoto.

- Forewing almost always lacking cross-veins interconnecting RA-RP cross-veins; two or more distinct gradate series present in forewing (Fig. 9 A-D).................................................................................. 5.

5. Forewing and hind wing with two gradate series (Fig. 9D, 10C)................................................ 6.

- Forewing with three gradate series; hind wing with either two or three gradate series (e.g., Fig. 9A, 10B)................ 7.

6. Forewing lacking cross-veins in basal part of wing; inner gradate series in forewing arranged in sigmoid pattern, sharply bent at mid point of wing (Fig. 9D).............................................................. A. lutea (Banks) .

- Forewing with irregular cross-veins in basal part of wing; inner gradate series only slightly recurved in forewing (Fig. 10C)................................................................................ A. retivenosa (Winterton) .

7. Forewing marking elongate (oblong-shaped), located on inner gradate series closer to ‘ psm than main branch of RP; hind wing pterostigma unmarked; forewing with irregularly arranged cross-veins amongst RP branches in basal part of wing (Figs 8, 9B) (Indonesia, India)................................................................... A. evanida Gerstaecker.

- Forewing marking round, sometimes very dark and well defined, located on inner gradate series closer to RP than ‘ psm ’ or at least mid way between the two; hind wing pterostigma with small dark marking; forewing either with cross-veins amongst RP branches in basal part of wing, or cross-veins lacking (Figs 9A, 10B, D) (Oceania)................................. 8.

8. Forewing without irregular cross-veins amongst RP branches in basal part of wing (Fig. 10B) (New Caledonia)........................................................................................... A. montrouzieri (Girard) .

- Forewing with additional irregular cross-veins amongst RP branches in basal part of wing (Figs 9A, 10D)............... 9.

9. Forewing marking well defined, located on inner gradate series distally, very close to RP; hind wing with two gradate series (Fig. 10D) (Solomon Islands)........................................................ A. salomonis (Kimmins) .

- Forewing marking less defined, located on inner gradate series approximately mid way between RP and ‘ psm ’ (Fig. 9A); hind wing with three gradate series (Vanuatu)................................................. A. cognata (Kimmins) .