Umbothynnus infuscatus, Brown, Graham, 2008

Brown, Graham, 2008, Umbothynnus, a newly recognised genus for the Rhagigaster alexius Guérin group of species (Hymenoptera: Tiphiidae: Thynninae: Rhagigasterini) from northern Australia, Zootaxa 1933, pp. 43-58 : 51-52

Umbothynnus infuscatus , New Species

(Figs 3, 4, 7, 24–26)

Diagnosis. Male. Integument black. Metasomal segments with transverse band of white setae; wings infuscate. T7 with transverse subapical carina continuing into a weak U-shaped carina laterally. The male is similar to U. katherinensis which does not have a transverse subapical epipygial carina.

Head. Weakly emarginate posteriorly, not strongly narrowed behind eyes; clypeus at most weakly emarginate, obtusely truncate apically, convex, not carinate, closely punctate; antennal prominence strongly produced, with broad U-shaped carina, discontinuous medially, produced below carina to antennal insertions; frons not transversely carinate, rugose-punctate, obscurely sagittally carinate to mid ocellus, not depressed; vertex closely punctate, impunctate posterolateral to hind ocelli; gena closely punctate.

Mesosoma . Pronotum narrower than head, punctate to rugose-punctate, anterior margin emarginate, raised and carinate, not produced laterally; mesoscutum rugose-punctate; tegulae closely punctate basally; mesoscutellum closely and deeply punctate, impunctate medially, convex, subtriangular, truncate posteriorly; metanotum closely punctate, below level of mesoscutellum; propodeum oblique posteriorly, not transversely carinate, rugose-punctate anteriorly, finely transversely rugose-punctate posteriorly; fore coxae closely and finely punctate; mesopleura rugose-punctate.

Metasoma. Cylindrical; T1–6 and S1–7 closely punctate; gradulus straight and scrobiculate on T2–6 and S3–5, curved and scrobiculate on S6, absent on S7; T1 oblique anteriorly, not tuberculate; S1 broadly raised, anterior V-shaped carina weakly produced ventrally; S2 not tuberculate; epipygium truncate posteriorly; hypopygium with broadly rounded basal angles; cuspis short; paracuspis long.

Length. Body 11 mm; fore wing 7 mm; hind wing 5 mm.

Female. Unknown.

Distribution. Coastal north-western Western Australia near Wyndham.

Etymology. The specific name is derived from Latin and refers to the infuscate wings.

Material examined. Western Australia: holotype. ɗ K.R.S. (Kimberley Research Stn, N of Kununurra), 29.ii.1952, G. Lukins ( ANIC).