Epipompilus, Kohl, 1884

Yuan, David & Rodriguez, Juanita, 2020, Three new species of Epipompilus Kohl (Hymenoptera, Pompilidae, Pepsinae) from Australia, Zootaxa 4743 (4), pp. 575-584 : 582-583

Key to species of Epipompilus occurring in Australia and New Guinea (modified from Evans, 1972)

Male

1. Fore wing with 3 submarginal cells ( Fig. 1A)............................................................... 2

– Fore wing with 2 submarginal cells ( Evans 1972: figs. 4, 5)................................................... 12

2. Subgenital plate tapering to acute or narrowly rounded apex ( Evans 1972: figs. 9–12)............................... 3

– Subgenital plate relatively broad, apex truncate, broadly rounded or subangulate, or weakly emarginate ( Figs. 2B, 5D)..... 7

3. Subgenital plate slender and acuminate ( Evans 1972: fig. 9); gonostylus slender, much exceeding parapenial lobe ( Evans 1972: figs. 21, 22).......................................................................................... 4

– Subgenital plate more gradually tapered or narrowly rounded apically ( Evans 1972: figs. 10–12); gonostylus relatively broad, not or barely exceeding parapenial lobe ( Evans 1972: figs. 18, 23, 24)........................................... 5

4. Antennae and coxae black; gonostylus moderately slender, strongly setose ( Evans 1972: fig. 21); tibial spurs stramineous, paler than legs................................................................................ E. collessi Evans

– Antennae and meso- and metacoxae ferruginous; gonostylus very slender, sparsely setose ( Evans 1972: fig. 22); tibial spurs ferruginous like legs.................................................................. E. ferrugineipes Evans

5. Subgenital plate slender apically, tip narrowly rounded ( Evans 1972: fig. 12); parapenial lobe unusually broad ( Evans 1972: fig. 18); wing veins nearly colorless, but stigma dark brown......................................... E. eyreanus Evans

– Subgenital plate tapering gradually to a subacute apex ( Evans 1972: figs. 10, 11); parapenial lobe slender, wing veins brown. ................................................................................................... 6

6. Third submarginal cell as wide as or slightly wider than second; digitus elongate, parapenial lobe simple ( Evans 1972: fig. 23)...................................................................................... E. bushi Evans

– Third submarginal cell as wide as second or only 2/3 as wide as second; digitus shorter and broader, parapenial lobe with roughened area on inner margin ( Evans 1972: fig. 24).............................................. E. semitinctus Evans

7. Surface of propodeum smooth with only weak surface sculpturing or weakly rugose; subgenital plate either broad and flat or broad apically but slender medially ( Figs. 2B, 5D), truncate or broadly rounded apically ( Fig. 3D)..................... 8

– Surface of propodeum rough, coarsely rugose, foveolate or irregularly carinate; subgenital plate somewhat slender, slightly emarginate apically ( Evans 1972: fig. 8) or broad, tapered, margined with strongly bent setae ( Evans 1972: fig. 20)....... 9

8. Subgenital plate simple ( Figs. 2B, 4D, 5D); digitus simple, much exceeded by parapenial lobe ( Figs. 2A, 4C, 5C); length of fore wing 2.8-4.5 mm ..................................................................................... 13

– Subgenital plate with lateral angulations ( Evans 1972: fig. 7); digitus large, hook-like, parapenial lobe reduced to small flaps ( Evans 1972: fig. 17); length of fore wing 5.5 mm ............................................. E. elongatus Evans

9. Subgenital plate somewhat narrow, weakly emarginate apically ( Evans 1972: fig. 8); propodeum with strong median longitudinal ridge.................................................................................. E. rieki Evans

– Subgenital plate broad, tapering to a broadly rounded or subangulate apex, margined with strongly bent setae; propodeum without strong median longitudinal ridge ( Evans 1972: fig. 20)................................................ 10

10. Legs entirely black; subgenital plate broad, tapering to broadly subangulate apex ( Evans 1972: fig. 20)..................................................................................................... E. carbonarius Evans

– Legs partly ferruginous or castaneous; subgenital plate tapering to narrower apex................................. 11

11. Wings tinged with yellow, with broad dark band subapically; aedeagus unusually short, much shorter than other genitalic appendages............................................................................. E. pictipennis Evans

– Wings clear hyaline; aedeagus elongate, exceeding digitus and approximately as long as gonostylus... E. hyalinipennis Evans

12. First transverse cubital vein absent ( Evans 1972: fig. 4); wing veins colorless, except stigma dark brown, forewing 2.8 mm ..................................................................................... E. stigmaticus Evans

– Third transverse cubital vein absent ( Evans 1972: fig. 5); wing veins brown; minute species, fore wing 1.8-2.4 mm .............................................................................................. E. reductus Evans

13. Subgenital plate broad and flat ( Fig. 5D); gonostylus broader apically than basally ( Fig. 5C)......................... 14

– Subgenital plate broad apically, slender medially ( Figs. 2B, 4D); gonostylus slender or straight and somewhat restricted apically ( Figs. 2A, 4C)....................................................................................... 15

14. Subgenital plate round apically; parapenial lobe higher on inner side; digitus round with longer setae apically.................................................................................................... E. turneri Evans

– Subgenital plate somewhat truncate, flat apically; parapenial lobe higher on outer side; digitus tapering apically.................................................................................................. E. taree sp. nov

15. Subgenital plate elongate, broad apically and basally but slender medially, without basal setae; gonostylus slender, much exceeding parapenial lobe; parapenial lobe truncate, higher on outer side; digitus slightly exceeded by aedeagus, thinner than gonostylus width gonostylus.......................................................... E. mirabundus sp. nov.

– Subgenital plate broad apically and basally but slender medially, with short setae basally; gonostylus relatively short, much exceeded by parapenial lobe, straight and somewhat constricted apically; parapenial lobe somewhat bending inwards with roughened area on inner margin; digitus short, much exceeded by aedeagus........................ E. namadgi sp. nov.