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.

Figures

FIGURE 1. Epipompilus mirabundus sp. nov., holotype, male. A. Habitus, dorsal view. B. Habitus, lateral view. C. Head, frontal view. D. Cocoon. Scale bar: 1mm for A, B and D; 0.1 mm for C.

FIGURE 2. Male genitalia of Epipompilus mirabundus sp. nov., holotype. A. Genitalia, ventral view. B. Subgenital plate, ventral view. Scale bar: 0.1 mm

FIGURE 3. Cocoon of Epipompilus mirabundus sp. nov., arrow pointed at the cocoon of E. mirabundus found sharing the mud nest of Sceliphron formosum, both cocoons emerged in the laboratory.

FIGURE 4. Epipompilus namadgi sp. nov., holotype, male. A. Habitus, lateral view. B. Head, frontal view. C. Genitalia, ventral view. D. Subgenital plate, ventral view. Scale bar: 1 mm for A; 0.1 mm for B, C and D.

FIGURE 5. Epipompilus taree sp. nov., holotype, male. A. Habitus, lateral view. B. Head, frontal view. C. Genitalia, ventral view. D. Subgenital plate, ventral view. Scale bar: 1 mm for A; 0.1 mm for B, C and D.