Subgenus Areselonus Braet, 1999

(Figures 1–2)

Diagnosis. Head transverse (Figs 1B–E); apical antennomeres shorter than basal (Fig. 1A); female with 16 antennomeres (Fig. 1A) (except in C. (A.) caeruleus Ahmad & Pandey which has 18 antennomeres) and male with 18 antennomeres; face rugose, rugulose, striate (Figs 1B, D); clypeus rugose or punctate (Fig. 1D); frons with a complete midlongitudinal carina (Fig. 1C); frons and vertex with transverse rugae (Figs 1C, E); mesoscutum reticulate-rugose (Fig. 2A); notauli impressed as large pits (Fig. 2A); scutellum coarsely rugose, slightly elevated over metanotum (Figs 2A, B); propodeum rugose with tubercles (Fig. 2B); fore wing vein SR1 often incomplete (Fig. 2F); metasomal carapace with apical spine like protuberance (Figs 2C–E).

Biology. Parasitoids of Gracillariidae .

Distribution. Australian and Oriental regions.

Key to the species of the subgenus Areselonus Braet

1. Apical spine of metasomal carapace large, setose basally with pores apically...................................... 2

- Apical spine of carapace small, setose entirely without pores apically (Figs 2C–E).................................. 3

2. Mesopleuron densely and finely punctate posteriorly; ovipositor sheath less than 0.1 × as long as fore wing............................................................................................. C. (A.) minutissimus Braet

- Mesopleuron smooth and sparsely punctate posteriorly; ovipositor sheath more than 0.1 × as long as fore wing................................................................................................ C. (A.) missai Braet

3. Metasoma angled with apical spine, hardly or not declivous below spine......................................... 4

- Metasoma strongly declivous below apical spine (Figs 1A, 2D)................................................. 5

4. Mesoscutum reticulate-rugose; fore wing vein 3-SR longer than r; scape 2.3 × as long as wide............................................................................................. C. (A.) chailini Walker & Huddleston

- Mesoscutum punctate-reticulate; fore wing vein 3-SR as long as r; scape 2.0 × as long as wide........................................................................................... C. (A.) lithocolletiscus Ahmad & Pandey

5 Female antenna with 18 antennomeres........................................ C. (A.) caeruleus Ahmad & Pandey

- Female antenna with 16 antennomeres (Fig. 1A)............................................................. 4

4. Metasomal carapace with a pair of longitudinal carina basally; clypeus rugose; fore wing vein 3-SR 1.6 × as long as r; third antennomere 3.0 × as long as wide......................................... C. (A.) spinigaster Ahmad & Ghramh

- Metasomal carapace without a pair of longitudinal carina basally (Fig. 2C); clypeus moderately punctate, raised medially (Fig. 1D); fore wing vein 3-SR as long as r (Fig. 2F); third antennomere 3.7 × as long as wide....... C. (A.) sigiriyansis sp. nov.