Pristomerus

Klopfstein, Seraina, 2016, Revising Australian Pristomerus (Hymenoptera, Ichneumonidae, Cremastinae): species with a tooth on the hind femur, Zootaxa 4168 (2), pp. 201-238 : 204-206

Key to the Australian species of Pristomerus

1. Hind femur with a small or large tooth on ventral surface ( Fig. 1 )................................................ 2

- Hind femur without accessory tooth.......................................... (species not covered in this revision)

2. Tergite 2 smooth and shining. Mesoscutum usually smooth and shining, with punctures restricted to front margin and some- times along notauli (mesoscutum evenly punctured in P. pellicius )............................................... 3

- Tergite 2 covered with fine, longitudinal carinulae ( Fig. 2 ). Mesoscutum more or less evenly punctured on most of its surface.................................................................................................... 17

3. Mesoscutum black or dark brown......................................................................... 4

- Mesoscutum orange.................................................................................... 5

4. Head black or dark brown. Smaller species, fore wing length at most 4 mm ................. Pristomerus tenebrosus n.sp.

- Head yellow. Larger species, fore wing length more than 6.5 mm ....................... Pristomerus flavicephalus n.sp.

5. Tergites 3 to 5 mostly orange, often with light apical bands, sometimes with irregular brown markings................... 6

- Tergites 3 to 5 mostly black or dark brown, often with light apical bands, sometimes with orange apical bands ( P. australiensis )...................................................................................................11

6. Face mostly black or dark brown, sometimes with orange inner eye margins or irregular central markings................ 7

- Face orange.......................................................................................... 9

7. Mesopleuron and propodeum black, with dense punctures and covered with very dense, silvery pile. Mesoscutum with dense punctures on entire surface (female unknown).......................................... Pristomerus pellicius n.sp.

- Mesopleuron and propodeum orange, with punctures less dense and less dense hairs. Mesoscutum with large unpunctured areas, especially on apical half and lateral lobes.............................................................. 8

8. Metapleuron with juxacoxal carina complete or almost complete ( Fig. 3 ). Hind femur orange. Last tergites often dark...................................................................... Pristomerus giraulti Townes, Townes & Gupta

- Metapleuron with juxacoxal carina absent, at most with short stump at base. Hind femur dark brown. Last tergites orange with broad, light apical bands, at most a bit darkened medially................................. Pristomerus luculentus n.sp.

9. Small species, fore wing less than 4 mm long, antenna with less than 33 flagellomeres. Ovipositor less than 2 × as long as hind tibia.......................................................................... Pristomerus periculosus n.sp.

- Larger species, fore wing more than 5 mm long, antenna with more than 37 flagellomeres. Ovipositor more than 2 × longer than hind tibia........................................................................................ 10

10. Hind tibia dark brown. First and second tergite orange basally, dark brown apically. Hind femur in female not enlarged, more than 4 × as long as wide (more enlarged in male)......................................... Pristomerus gracilis n.sp.

- Hind tibia orange, often with apex darkened. First and second tergite orange. Hind femur enlarged in both sexes, at most 4 × as long as wide in female.............................................................. Pristomerus dundeei n.sp.

11. Antenna with 33 or more flagellomeres. Larger species, fore wing length at least 4.5 mm ............................ 12

- Antenna with 32 or less flagellomeres. Smaller species, fore wing length at most 4.5 mm ............................ 15

12. Hind femur dark brown, with a very large tooth on ventral surface ( Fig. 1 a). Face usually dark brown with orange inner eye margins and yellow on malar space, but sometimes entirely orange. Propodeum usually darkened apically............................................................................................ .. Pristomerus bicinctus Girault

- Hind femur orange, tooth often smaller. Head and propodeum usually entirely orange............................... 13

13. Tergites 1 and 2 and usually the basal part of tergite 3 orange. Fore wings only somewhat infuscate, light brown. Ovipositor at least 2.4 × as long as hind tibia...................................................... Pristomerus venustus n.sp.

- Tergites 1 usually orange at base, but apex and tergite 2 mostly dark. Fore wings strongly infuscate, medium to dark brown. Ovipositor at most 2.5 × as long as hind tibia............................................................... 14

14. Mesopleuron, propodeal areas and hind coxa with strong and rather dense punctures, smooth in-between. Tergites with rather narrow white apical bands. Hind femur more slender, at least 4.0 × as long as wide............... Pristomerus merus n.sp.

- Mesopleuron, propodeal areas and hind coxa with only few, weak punctures, mostly just smooth and shining. Tergites with broad white apical bands. Hind femur more stout, at most 4.0 × as long as wide................ Pristomerus stellatus n.sp.

15. Hind femur widened, at most 4.3 × longer than wide, and with a medium-sized to large tooth. Mesopleuron below subtegular ridge smooth with punctures...................................................... Pristomerus atrifemur Girault

- Hind femur rather slender, at least 4.5 × longer than wide, with a small tooth on ventral surface. Mesopleuron below subtegular ridge with a set of diagonal, parallel carinulae (cf. Fig. 11 D)................................................... 16

16. Hind coxa and at least apical part of propodeum black. Tergites 3 and following dark, at most with narrow white apical bands.................................................................................. Pristomerus laetus n.sp.

- Hind coxa orange or brown, propodeum orange. Tergites 3 and following brown with rather wide, orange apical bands................................................................................... Pristomerus australiensis n.sp.

17. Mesoscutum black or dark brown. Metapleuron with juxacoxal carina often present on most of its length (cf. Fig. 3 )....... 1 8

- Mesoscutum orange. Metapleuron without juxacoxal carina.................................................... 20

18. Tergites 1 and 2 mostly orange, at most with some dark markings basally on tergite 2. Hind tibia orange with apex darkened................................................................................ Pristomerus callitrinus n.sp.

- Tergites 1 and 2 mostly dark, tergite 1 usually orange at base. Hind tibia yellow in the middle and with apex and base or sub- basal band darkened................................................................................... 19

19. Mesosoma black. Fore wing uniformly hyaline to somewhat infuscate................... Pristomerus fourecksensis n.sp.

- Mesosoma dark brown with extended orange markings along notauli, on lower mesopleuron, on scutellum and propodeum. Fore wing with apex darkened...................................................... Pristomerus nedkellyi n.sp.

20. Scutellum all smooth and shining, impunctuate. Fore wing hyaline with apex somewhat infuscate. Hind femur entirely orange.................................................................................................... 21

- Scutellum smooth with some punctures. Fore wing uniformly hyaline or infuscate. Hind femur usually darkened......... 22

21. Back of head dark brown or black. Smaller species, fore wing shorter than 4.3 mm .............. Pristomerus lunatus n.sp.

- Head entirely orange. Larger species, fore wing more than 4.5 mm ...................... Pristomerus kakaduensis n.sp.

22. Mesosternum and propodeum mostly black. Fore wing hyaline. Tooth on hind femur very short.................................................................................................... Pristomerus bertschmanni n.sp.

- Mesosoma entirely orange. Fore wing infuscate, light brown. Tooth on hind femur of medium size, usually about as long as hind tibia wide at mid length...................................................... Pristomerus mangiferus n.sp.

Figures

FIGURE 1. Hind femur showing ventral tooth in Pristomerus bicinctus (A) and P. laetus (B).

FIGURE 2. Second tergite being smooth and shining in Pristomerus bicinctus (A) and showing fine longitudinal carinulae in P. fourecksensis (B).

FIGURE 3. Propodeum of (A) Pristomerus giraulti with complete juxacoxal carina and (B) of P. dundeei with only traces of the carina.

FIGURE 11. Holotype of Pristomerus fourecksensis sp. nov. A. Habitus and ovipositor tip. B. Face. C. Mesoscutum and head from above. D. Head and mesosoma from lateral. E. Propodeum. F. Metasoma. Scale bars represent 1 mm (A) and 0.5 mm (B, C, D, E, F).