Key to species of Stagmatoptera

1. Forewings with a spot or dark stripes around the stigma (Figs. 2; 56; 57)........................................ 2

- Forewings without spots or stripes (Fig. 58).............................................. Stagmatoptera indicator

2. Female forewings with two brown stripes, the basal-most is larger and branched, the apical one is smaller and simple (Fig. 5 7).............................................................................. Stagmatoptera abdominalis

- Forewings with a spot different than one described above (Figs. 2; 26; 54)....................................... 3

3. Anterior femoral spot extending at least to the 8th anteroventral spine (Fig. 9 B)................................... 4

- Anterior femoral spot absent or extending at most to the 6th anteroventral spine (Fig. 9 A; 9F)........................ 8

4. Spot on stigma large, reaching the posterior margin of the forewings (Fig. 23)................. Stagmatoptera biocellata

- Spot on stigma smaller, not reaching the posterior margin of the forewings (Figs. 26; 54)............................. 5

5. Spot on the stigma with two dark brown stripes on the laterals that frequently do not join on the posterior end (Fig. 54). Frontal shield with 4 carinae (Fig. 32 D)...................................................... Stagmatoptera reimoseri

- Spot on the stigma with a semi-circular brown spot (Figs. 26; 27). Frontal shield with only 2 carinae (Fig. 3 B).......... 6

6. Spot on stigma of males completely enveloped by a green stripe on the discoidal area (Fig. 25). Large males, 80 mm or longer. Tibial spur and first anteroventral tibial spine black..................................... Stagmatoptera cerdai sp. n.

- Spot on stigma of males only partially enveloped by a green stripe on the discoidal area (Fig. 26). Medium-sized males, 60 to 80 mm long. Only tibial spur is black.................................................................... 7

7. Prothorax broad, 3.3–3.6 times longer than wide in males, 4–4.3 times in females. Internal femoral spot reaching the 10th anteroventral spine (Fig. 9 B)...................................................... Stagmatoptera diana sp. n.

- Prothorax slender, between 4–4.4 times longer than wide in males, 4.6–5.1 times in females. Internal femoral spot reaching the 8th anteroventral spine (Fig. 9 E)...................................................... Stagmatoptera femoralis

8. Fore- and hindwings of males not reaching abdominal apex (female unknown) (Fig. 53)........... Stagmatoptera pumila

- Fore- and hindwings of males at least reaching abdominal apex (Fig. 52).......................................... 9

9. Metazona strongly crenulated in both sexes (Figs. 5 A; 6A)................................... Stagmatoptera binotata

- Metazona of females lightly crenulated (Figs. 6 E; 35A; 35B; 35D; 35E), smooth in males (Figs. 5 F; 34A; 34B; 34E; 34F). 10

10. Anterior surface of foretibia with a small dark spot at the base of spines 5–6 or 6–7 (Figs. 40 A; 40E; 40F)............. 11

- Anterior surface of the foretibia without dark spots........................................................ 13

11. Spot on the male’s pterostigma with a white component; in females, the spot is circular with a brown shading (Fig. 30). Male antennomeres filiform................................................................... Stagmatoptera pia

- Spot on the male’s pterostigma without a white component; in females, the spot is oval-shaped, with dark and light brown regions (Figs. 55; 56). Male antennomeres serrated.......................................................... 12

12. Spot on the male’s stigma with a hyaline region that lacks cross-veins; spot on the female’s stigma do not reach the middle of the discoidal area. Female’s hindwings hyaline with yellow stripes on the cross-veins (Fig.55)..................................................................................................... Stagmatoptera septentrionalis

- Spot on the male’s stigma with a hyaline region presenting cross-veins; spot on the female’s stigma surpass the middle of the discoidal area, reaching its margin. Female’s hindwings largely yellow, the posterior margin is hyaline with yellow stripes (Fig. 56)............................................................................ Stagmatoptera supplicaria

13. Spot on stigma rounded and medium size, pattern like in Fig. 29 ........................... Stagmatoptera hyaloptera

- Spot on stigma rounded and small, pattern like in Fig.52 ................................... Stagmatoptera precaria