1a |
a. Prominent dark crossband along the frontoclypeal suture |
2 |
1b |
a. No prominent dark crossband along the frontoclypeal suture, although suture may appear as a dark hairline |
3 |
|
2a(1a) |
a. Dark frontoclypeal band at most about as wide as the median ocellus |
Gomphurus lineatifrons (Calvert) |
b. Subgenital plate of female with apices blunt |
also: Hindwing <38mm; interpleural dark stripe incomplete; in lateral view, poasterior margin of penis vesicle nearly straight in middle 1/2 or more; penile flagella long; subgenital plate about 1/2 as long as Ab9 sternum, constricted near base |
2b |
a. Dark frontoclypeal band wider than the median ocellus |
Gomphurus vastus (Walsh) |
b. Subgenital plate of female with apices acut |
also: Ab9 lateral margins entirely yellow; hingwing <34mm; in lateral view penis vesicle about 3/4 as long basally as high; subgenital plate of female more than 1/2 as long as Ab9 sternum |
|
3a(1b) |
a. Interpleural dark stripe complete, metepisternal pale stripe not confluent with mesepimeral pale stripe |
Gomphurus externus (Hagen) |
b. Extensor surface of tibiae generally with a pale yellow basal stripe |
c. Third femora of female usually without a yellow stripe |
3b |
a. Interpleural dark stripe incomplete, metepisternal pale stripe confluent with mesepimeral pale stripe above the metathoracic spiracle |
4 |
b. Extensor surface of tibiae generally without a pale yellow basal stripe |
c. Third femora of female usually with a yellow strip |
|
4a(3b) |
a. Dorsum of Ab8 without a yellow basal spot, or with only a minute spot |
Gomphurus ventricosus (Walsh) |
b. Penis vesicle of male, in lateral view, not higher than its basal length, the anterior surface with a cup-like excavation |
c. Penile flagella of male variable |
d. Posterior hamules of male each usually with shoulder not visible in strict lateral view |
e. Subgenital plate of female <1/2 length of Ab9 sternum |
4b |
a. Dorsum of Ab8 with a distinct, triangular yellow basal spot, 1/5 segment length |
5 |
b. Penis vescile of male, in lateral view, higher than its basal length, the anterior surface with a V-shaped cleft |
c. Penile flagella of male long |
d. Posterior hamules of male each usually with shoulder visible in strict lateral view |
e. Subgenital plate of female at least 1/2 length of Ab9 sternum |
|
5a(4a) |
a. Dorsum of Ab9 with yellow spot |
Gomphurus crassus (Hagen) |
b. Male cerci each with a distinct lateral ridge ending in a tooth |
c. Female vertex without erect horns behind ends of postocellar ridge |
d. Female occiput without median conical tooth |
5b |
a. Dorsum of Ab9 without a yellow spot |
Gomphurus fraternus (Say) |
b. Male cerci each without a distinct lateral ridge ending in a tooth |
c. Female vertex with erect horns behind ends of postocellar ridge |
d. Female occiput with a median conical tooth |
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