Antrocephalus validicornis (Holmgren, 1868)

Narendran, T. C. & van Achterberg, Cornelis, 2016, Revision of the family Chalcididae (Hymenoptera, Chalcidoidea) from Vietnam, with the description of 13 new species, ZooKeys 576, pp. 1-202 : 19

Taxon classification Animalia Hymenoptera Chalcididae

Antrocephalus validicornis (Holmgren, 1868) Figs 23-24

Haltichella validicornis Holmgren, 1868: 438 (♂, Java (NHRM); lectotype designated by Narendran 1989).

Antrocephalus validicornis ; Narendran 1989: 45.

Material.

1 ♀ (RMNH), "Vietnam: Ninh Thuân, Núi Chúa N. P., northeast part, Mal[aise] traps, 90-150 m, 23-30.v.2007, C. v. Achterberg & R. de Vries, RMNH’07”.

Diagnosis.

Antrocephalus validicornis comes near Antrocephalus phaeospilus Waterston in the key to species provided by Narendran (1989), but differs from it in having: 1) hind femur more than twice as long as wide (in Antrocephalus phaeospilus less than twice as long as wide); 2) hind femur black with base and apex red (in Antrocephalus phaeospilus completely red); 3) apex of scutellum only emarginate; not bi-lobed (in Antrocephalus phaeospilus apex of scutellum bi-lobed) and 4) eyes bare (in Antrocephalus phaeospilus eyes setose). Antrocephalus validicornis superficially resembles Antrocephalus atulyus Narendran (Narendran, 1989), but differs from it in having: 1) comb of teeth on ventral margin of hind femur starting near middle length of femur to apex (in Antrocephalus atulyus comb of teeth starts well before middle length of femur); 2) interstices of pronotum and of anterior part of mesoscutum rugose and somewhat carinate (in Antrocephalus atulyus interstices mostly smooth and shiny); 3) apex of scutellum emarginate (in Antrocephalus atulyus apex of scutellum bi-lobed) and 4) fore wing without any brown or black infuscation (in Antrocephalus atulyus fore wing with brownish infuscation adjoining MV). Among Vietnamese species of Antrocephalus , Antrocephalus validicornis comes near Antrocephalus nasutus (Holmgren) in having PMV distinctly longer than MV, but differs from it in having: 1) hind femur with ventral comb of teeth starting from middle length of hind femur, occupying 0.5 × length of femur (in Antrocephalus nasutus comb of teeth starts well before middle length of hind femur, occupying 0.7 × length of femur); 2) apex of scutellum shallowly emarginate (in Antrocephalus nasutus apex of scutellum deeply incised) and 3) hind femur black with base and apex red (in Antrocephalus nasutus hind femur red).

Description.

♀♂. Head with post-orbital carinae indistinct or absent; geno-temporal furrow distinct; eyes bare; interstices of pronotum and anterior part of mesoscutum rugose and somewhat carinate; apex of scutellum carinate; fore wing without black or brown infuscation; PMV distinctly longer than MV; hind femur black with base and apex red, its length more than twice its maximum width; hind femur without an inner basal tooth; metasoma with two carinae on T1, carinae much shorter than 1.25 × T1.

Host.

Unknown.

Distribution.

Vietnam (new record), Indonesia (Java), Malaysia ( Narendran 1989).