Key to the species of Dryinidae from Caxiuanã (females) [Based partly on Olmi 1984, 1991, 1992, 1993, 1998] 1 Chela with rudimentary claw............................................................................ 2 - Chela without rudimentary claw. (Anteoninae).............................................................. 8 2 Mesotibial spur present. (Dryininae)...................................................................... 3 - Mesotibial spur absent. (Gonatopodinae)................................................................. 13 3 Enlarged pretarsal claw with broad apical lamella, without subapical tooth. (Dryinus Latreille, lamellatus species-group).................................................................................... Dryinus hamulus sp. nov. - Enlarged pretarsal claw without broad apical lamella, with one subapical tooth.................................... 4 4 Notauli at least partly visible. (Dryinus Latreille, constans species-group)......................................... 5 - Notauli not visible. (Dryinus Latreille, ruficauda species-group)................................................ 7 5 Mesoscutum laterally sculptured by longitudinal keels, medially reticulate rugose; OPL as long as POL, posterior ocelli distant from occipital carina................................................................. Dryinus snellingi Olmi - Mesoscutum fully sculptured by numerous longitudinal keels; OPL shorter than POL, posterior ocelli near occipital carina ... 6 6 Prothorax mostly black (Figs 18, 19)................................................... Dryinus striatus (Fenton) - Prothorax fully or mostly reddish (Figs 7, 9)............................................ Dryinus argentinus Olmi 7 Head with OL more than 3 × as long as POL; dorsal surface of propodeum reticulate rugose; protarsomere 1 nearly as long as protarsomere 4................................................................... Dryinus ruficeps Cameron - Head with OL shorter than POL; dorsal surface of propodeum with numerous strong, straight longitudinal keels (Fig. 17); pro- tarsomere about 2 × protarsomere 4.............................................. Dryinus multicarinatus sp. nov. 8 Inner surface of enlarged pretarsal claw with proximal prominence bearing a single bristle. (Anteon Jurine)............. 9 - Inner surface of enlarged pretarsal claw with proximal prominence lacking bristles; 1–2 short bristles or peg-like setae located further distal to proximal prominence. (Deinodryinus Perkins)................................................ 11 9 Head fully reticulate rugose; pronotum produced with raised, transverse carina between anterior and posterior surfaces................................................................................. Anteon chiriquense (Cameron) - Head not reticulate rugose; pronotum not produced with a raised, transverse carina between anterior and posterior surfaces...................................................................................................... 10 10 Head with punctures separated by smooth surface, without keels; pronotum with two dorsal, transverse lobes; fore wing with two dark transverse bands............................................................... Anteon noyesi Olmi - Head with punctures separated by granulate surface, with numerous longitudinal keels; pronotum without dorsal lobes; fore wing hyaline, without dark transverse bands............................................. Anteon panamense Olmi 11 Head granulate, without keels (Fig. 4); pronotum with posterior surface flat (Figs 2, 3)...... Deinodryinus caxiuana sp. nov. - Head smooth or rugose, with keels; pronotum with surface not flattened......................................... 12 12 Head with five incomplete longitudinal keels on frons, without keels around orbits and with numerous longitudinal keels on vertex, integument between keels rugose; pronotum with two distinct dorsal lobes laterally.... Deinodryinus bilobus Fenton - Head with two median, longitudinal keels on frons, with keel around orbits and two oblique keels connecting posterior ocelli to occipital carina, integument between keels smooth; pronotum without dorsal lobes. Deinodryinus bicolor (Olmi et Currado) 13 Species fully winged; tibial spur formula 1–0–2......................................... Neodryinus incaicus Olmi - Species apterous; tibial spur formula 1–0–1................................................................ 14 14 Enlarged pretarsal claw with large subapical tooth.......................................................... 15 - Enlarged pretarsal claw without subapical tooth, with a small tooth at end of longitudinal furrow...................... 16 15 Maxillary palpi with six palpomeres; labial palpi with three palpomeres; head, pronotum, and mesoscutum granulate; prono- tum without striae; surface of metathorax and propodeum granulate and sculptured with fine, transverse striae. (Gonatopus Ljungh, testaceus species-group)................................................. Gonatopus testaceus Cameron - Maxillary palpi with 4–5 palpomeres; labial palpi with two palpomeres; head, pronotum, and mesoscutum smooth or weakly granulate; pronotum with a few striae laterally; surface of metathorax and propodeum smooth or granulate, sculptured with coarse, transverse striae. (Gonatopus Ljungh, neotropicus species-group)................. Gonatopus neotropicus (Olmi) 16 Pronotum crossed by a strong, transverse impression; maxillary palpi with four palpomeres; labial palpi with two palpomeres; head smooth, with median keel on frons; metanotum transversely striate, with two lateral points; posterior surface of propodeum and part of pleura transversely striate, integument between striae smooth. (Gonatopus Ljungh, orbitalis species-group)............................................................................... Gonatopus campbelli Olmi - Pronotum not crossed by a transverse impression (Figs 22, 23); maxillary palpi with six palpomeres; labial palpi with three palpomeres; head granulate, with short keels along orbits; metanotum granulate, with sides rounded; posterior surface of propodeum and pleura not transversely striate, granulate................................ Trichogonatopus neotropicus Olmi

Published as part of Coelho, Beatriz W., Aguiar, Alexandre P. & Engel, Michael S., 2011, A survey of Dryinidae (Hymenoptera, Chrysidoidea) from Caxiuanã, Amazon Basin, with three new taxa and keys to genera and species, pp. 1-21 in Zootaxa 2907 on pages 19-20, DOI: 10.5281/zenodo.201416