couplet number (link to couplet) /description of couplet/key taxon

1 / hindfemur enlarged /
2 / prepectus reduced or apparent /
3 / ovipositor is horizontal or curved / Chalcididae or Leucospidae
4 / head modified with horns / Dirhininae (Chalcididae)
5 / hindtibia truncate; 2 hindtibial spurs / Haltichellinae or Chalcidinae (Chalcididae)
6 / inner eye margins diverging ventrally; antennae inserted low on face / Chalcedectini (Pteromalidae) or Podagrionini (Torymidae)
7 / number of antennal segments between pedicel and club /
8 / hindwing on stalk /
9 / MT1 and MT2 petiolate / Mymarommatidae or Mymaridae
10 / mesopleuron concave or convex /
11 / head projecting forward or downward / Agaonidae
12 / antennal insertion near apical margin of the clypeus /
13 / locaton of antennal insertion; MT1 petiolate / Spalangiinae or Ceinae (Pteromalidae)
14 / forwing stigma enlarged / Megastigminae (Torymidae)
15 / scutellum with submedian grooves meeting notauli / Agaonidae
16 / size of hind coxa in relation to forecoxa /
17 / metasoma with or without pits; ovipositor exserted / Toryminae (Torymidae) or Ormyridae
18 / pronotum shape in dorsal view / Eurytomidae
19 / prepectus size in relation to tegula / Eurytominae (Eurytomidae)
20 / scutellum with or without projection / Heimbrinae or Rileyinae (Eurytomidae)
21 / pronotum visible in dorsal view / Eucharitidae
22 / prepectus fused to pronotum / Eucharitinae or Oraseminae (Eucharitidae)
23 / number of visible terga on metasoma / Perilampidae or Pteromalidae
24 / prepectus fused to the pronotum / Chrysolampinae or Perilampinae (Perilampidae)
25 / axillae forward from scutellum /
26 / axillae enlarged and meeting medially / Eutrichosomatinae (Pteromalidae)
27 / scutellum posteriorly with triangular projection / Colotrechninae or Macromesinae (Pteromalidae)
28 / ocelli touching occipital edge / Eunotinae (Pteromalidae)
29 / head with projection between antennae; brown, black or metallic / Cerocephalinae (Pteromalidae)
30 / head and thorax with curved stout setae / Diparinae (Pteromalidae)
31 / body shape elongate or normal / Leptofoeninae (Pteromalidae)
32 / eye margins parallel or divergent ventrally / Cleonyminae (Pteromalidae)
33 / eyes, head or thorax covered with setae /
34 / eyes, bare; scutellum polished / Herbertiinae (Pteromalidae) or Tetracampidae
35 / cheeks carinate laterally / Asaphinae or Pteromalinae/Miscogasterinae (Pteromalidae)
36 / fore and midcoxae separated or touching / Encyrtidae
37 / notauli visible; prepectus flat or inflated / Eupelmidae or Tanaogstigmatidae
38 / membranous area anterior to midcoxa / Neanastatinae (Eupelmidae)
39 / scutum wider than pronotum; pronotum divided medially / Calosotinae or Eupelminae (Eupelmidae)
40 / size greater than or less than 1 mm /
41 / hindcoxa greatly enlarged or normal / Tribe Elasmini (Eulophidae: Eulophinae)
42 / scutellum with 1 or 2 pair s of setae / Entedoninae (Eulophidae)
43 / forewing with bare area posterior to marginal vein / Euderinae (Eulophidae)
44 / postmarginal vein absent; scutellum with paired submedian grooves / Tetrastichinae or Eulophinae (Eulophidae)
45 / number of segments on tarsi; setae in wings arranged in rows / Trichogrammatidae
46 / propodeum with triangular median area / Signiphoridae or Aphelinidae