Arpactophilus Smith, 1863

Breitkreuz, Laura C. V., Ohl, Michael & Engel, Michael S., 2016, A review of the New Caledonian Arpactophilus (Hymenoptera: Crabronidae), Zootaxa 4063 (1), pp. 1-66 : 6

Genus Arpactophilus Smith, 1863

Arpactophilus Smith, 1863:36 . Type species: Arpactophilus bicolor Smith, 1863 , by monotypy.

Harpactophilus Kohl, 1897:276 . Emendation of Arpactophilus Smith, 1863 .

Austrostigmus Turner, 1912:55 . Type species: Austrostigmus queenslandensis Turner, 1908 [= Stigmus queenslandensis Turner, 1908 ], by original designation. Synonymized with Arpactophilus by Bohart in Bohart and Menke, 1976:41, 186.

Diagnosis. Representatives of the genus Arpactophilus are the only spilomenine wasps with the combination of an occipital carina that is always presently ventrally and a palpal formula never exceeding 5:4 (maxillary: labial). The occipital carina is dorsally interrupted in some species and continuous in others. The frontal carina is always present, varying from a complete carina extending from the median ocellus to the apical margin of the clypeus or may only be present on the lower 2/3 of the frons to the middle of the clypeus. The forewing may have one or two submarginal cells, and only two subdiscoidal cells. The metabasitibal plate is absent, some species have a distinctly colored and structured area apically on the metatibia. Spiniform setae are absent on the legs and pygidium, and tarsomere V is not distinctly larger than tarsomeres I–IV. The metasoma is sessile. Females lack a pygidial plate, but possess silk-secreting setae at the apex.