1	Mesosoma flattened, scutellum at same level as propodeum; scutellum almost smooth and without a transverse posterior carina; hind coxa more or less shortened, not surpassing apex of tergite I	2
–	Mesosoma normal (Figs 1A–F), scutellum protruding far above level of propodeum; scutellum rugose or punctate-rugose or finely punctate, often with an apical spine; hind coxa long, distinctly surpassing apex of tergite I	3
2	Propodeum with a very coarse median carina combined with various strong secondary rugae; body large (about 5.5 mm), completely brownish yellow. [Distribution. Papua New Guinea: East New Britain (Kerevat)]	Wilkinsonellus daira (Nixon, 1965)
–	Propodeum with a coarse median carina dividing propodeum into two smooth lateral parts, without rugae; body rather small (2.4 mm), black, metasoma yellowish brown, tergite I ivory colored laterally. [Distribution. North of Vietnam (Ha Tay)]	Wilkinsonellus flavicrus Long & van Achterberg, 2011
3	Ocelli small or medium-sized (Figs 3B, 4B, 5B), OOL more than diameter of posterior ocellus or subequal, inner margins of eyes at antennal sockets hardly or not emarginate	4
–	Ocelli large to very large (Fig. 2E), OOL less than diameter of posterior ocellus or equal; inner margins of eyes at antennal sockets deeply emarginate	16
4	Mesopleuron obliquely striate above precoxal sulcus; OOL 1.0–1.5 times diameter of posterior ocellus. [Distribution. Australia: Queensland (Atherton, Little Mulgrave Natl Pk, Mt Webb Natl Pk). Papua New Guinea: Western Highlands (Baiyer river Sanctuary), Morobe (Mt Keinde [Kaindi], Sattelberg)]	Wilkinsonellus striatus Austin & Dangerfield, 1992
–	Mesopleuron smooth or sparsely punctate above precoxal sulcus; OOL 1.6–2.0 times diameter of posterior ocellus	5
5	Body completely brownish yellow (Figs 1E–F, 4A, 5A)	6
–	Body partly dark brown or blackish, at least propodeum and mesopleuron (Figs 1D, 3A)	10
6	Face coarsely reticulate-rugose	7
–	Face finely and densely punctate	8
7	Body entire fulvous, except hind femur and hind tibia slightly darkened at extreme apex; OOL less than twice diameter of posterior ocellus. [Distribution. Philippines: Mindanao (Davao). Taiwan: Pingtung (Kenting Ntl. Pak., Shantimen [Sandimen?])]	Wilkinsonellus iphitus (Nixon, 1965)
–	Body yellowish orange except tergites III –IV (medially) and following tergites dark brown, and hind tarsi infuscate; OOL 1.27 times diameter of posterior ocellus. [Distribution. Reunion Island: Bras-Panon (La Caroline), Saint Pierre (Bassin Martin)]	Wilkinsonellus narangahus (Rousse & Gupta, 2013)
8	Hind wing with vannal lobe of typical microgastrine dimensions (Figs 3J, 5J). [Distribution. Fiji: Kavadu, Taveuni and Viti Levu]	Wilkinsonellus nescalptura Arias-Penna, Zhang & Whitfield, sp. n
–	Hind wing with vannal lobe reduced (Fig. 4J)	9
9	Outer dorsal surface of hind coxa with distinct longitudinal carina, inner dorsal surface coarsely reticulate; hypopygium smooth and hairless. [Distribution. Papua New Guinea: Jiwaka (Jimmi Valley), Madang, Morobe (Bulolo, Busu River in Lae, Lae-Zenag Road, Saruwaged Range), East New Britain (Kerevat). Australia: Queensland (MtTozer)]	Wilkinsonellus tomi Austin & Dangerfield, 1992
–	Outer dorsal surface of hind coxa with coarse and heterogeneous aerolate-rugose sculpture throughout without carina, ventral surface with dense and fine punctate those two areas separated by a flat, smooth and shiny stripe (Fig. 1B); hypopygium setose (Fig. 4H). [Distribution. Fiji: Gau, Kadavu, Taveuni, Vanua Levu, Viti Levu]	W. fijiensis Arias-Penna, Zhang & Whitfield, sp. n.
10	Scutellum with a small spine apically (Fig. 1F)	11
–	Scutellum without spine apically	15
11	Head yellow-orange or reddish-brown (Fig. 1D, 3A)	12
–	Head black or blackish brown	14
12	Frons with two distinct parallel carinae between antennal sockets. [Distribution: Central highlands of Vietnam (Kon Tum)]	Wilkinsonellus nigrocentrus Long & van Achterberg, 2011
–	Frons with rippled sculptures between antennal sockets (Fig. 3B)	13
13	Hind coxa reddish-brown; surface of hind coxa reticulate with fine granulate background sculpture. Head and mesosoma reddish-brown. [Distribution. India: Maharashtra (Solapur)]	Wilkinsonellus granulatus Ahmad, Pandey, Haider & Shuja-Uddin, 2005
–	Hind coxa completely black, but yellow-brown ventrally; outer dorsal surface of hind coxa with coarse aerolate-rugose sculpture, but finely sculptured in the remaining area (Fig. 1A); head yellow-orange and mesosoma brown-black. [Distribution. Fiji: Kadavu, Taveuni, Vanua Levu, Viti Levu]	Wilkinsonellus corpustriacolor Arias-Penna, Zhang & Whitfield, sp. n.
14	Vein 1CUa of fore wing 0.50 times as long as vein 1CUb; pterostigma distinctly shorter vein R1 (23: 60); frons smooth; propodeum largely rugose; vein cu-a of hind wing more or less sinuate. [Distribution. Vietnam: NE (Ha Giang), Central highlands (Lam Dong)]	Wilkinsonellus nigratus Long & van Achterberg, 2011
–	Vein 1CUa of fore wing 0.85 times as long as vein 1CUb; pterostigma as long as vein R1; frons rugose/punctate; propodeum sparsely rugose apically, smooth basally; vein cu-a of hind wing curved. [Distribution. Northeast of Vietnam (Thai Nguyen)]	Wilkinsonellus masoni Long & van Achterberg 2011
15	Head entirely, mesoscutum and scutellum black; frons, vertex and temple dull, coarsely rugose-punctate; scutellum medially dull and densely rugose; second metasomal tergite with an elongate parallel-sided area. Distribution. Belgian Congo (Nyasheke [Now Rwanda: Nyamasheke?]. Kenya (Embu)]	Wilkinsonellus henicopus (de Saeger, 1944)
–	Head brownish yellow, mesoscutum and scutellum reddish brown; frons, vertex and temple shiny and almost smooth; scutellum medially shiny and superficially rugose-punctate; second tergite without such area. [Distribution. Philippines: Luzon (Mt Makiling)]	Wilkinsonellus thyone (Nixon, 1965)
16	Lateral lobes of mesoscutum and mesopleuron ventrally yellow or brownish yellow; ocelli strongly protuberant, in frontal view completely above dorsal level of eyes	17
–	Lateral lobes of mesoscutum and mesosternum dark brown or blackish; ocelli less protuberant, in frontal view partly below dorsal level of eyes	21
17	Hind coxa yellow/orange without dark brown patch. [Distribution. Australia: Queensland (Herbert River in Ingham, Hope Vale Mission, Mt Spec, Mt Baird), Northern Territory (Mudginbarry H.S.)]	Wilkinsonellus amplus Austin & Dangerfield, 1992
–	Hind coxa yellow with apex light brown or with a dark brown ventral patch (Figs 1A–C)	18
18	Notauli absent. [Distribution. Vietnam: North Central Coast (Ha Tinh, Nghe An), Northeast (Thai Nguyen), Central highlands (Dak Lak), Southeast (Dông Nai)]	Wilkinsonellus longicentrus Long & van Achterberg, 2003
–	Notauli present but incomplete	19
19	Scutellar sulcus with seven carinate foveae. Axillary trough of metanotum with complete parallel carinae. Eyes and ocelli appearing reddish in preserved specimens (Figs 1C, 2E) [habitus Fig. 1C]. [Distribution. Panamá: Panamá (Las Cruces)]	Wilkinsonellus panamaensis Arias-Penna & Whitfield, 2013
–	Scutellar sulcus with five carinate foveae. Axillary trough of metanotum with some incomplete parallel carinae. Eyes and ocelli silver in preserved specimens	20
20	Fore and hind wings infuscate [habitus Fig. 1B]. [Distribution. Colombia: Magdalena (Tayrona Natl Pk), Chocó (Utría Natl Pk)]	Wilkinsonellus kogui Arias-Penna & Whitfield, 2013
–	Fore wing and hind wing not infuscate [habitus Fig. 1A]. [Distribution. Costa Rica: Alajuela (Area de Conservación Guanacaste)]	Wilkinsonellus alexsmithi Arias-Penna & Whitfield, 2013
21	Temple narrow, in lateral view its width near middle of eye 0.3–0.35 times transverse diameter of eye; OOL of female 0.2–0.3 times diameter of posterior ocellus; vertex without transverse rugosities. [Distribution. Vietnam: Northwest (Hoa Binh), Southeast (Dông Nai), Central highlands (Dak Lak), South central coast (Ninh Thuân)]	Wilkinsonellus paramplus Long & van Achterberg, 2003
–	Temple wider, in lateral view its width near middle of eye 0.4–0.5 times transverse diameter of eye; OOL of female 0.5 times diameter of posterior ocellus; vertex with distinct transverse rugosities. [Distribution. Vietnam: Northeast (Thai Nguyen), North Central Coast (Thua Thien-Hue)]	Wilkinsonellus tobiasi Long, 2007