Umbothynnus alexius (Turner) Turner, 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 : 46-47

Umbothynnus alexius (Turner) , New Combination

(Figs 3, 4, 12–17)

Rhytidogaster alexius Turner, 1907 . Proc. Linn. Soc. NSW 32: 230. Lectotype male and paralectotype female: Queensland, Cape York (BMNH).

Rhagigaster alexius ( Turner), Turner, 1910 . Gen. Ins. 105: 71.

FIGURE 3. Distribution of Umbothynnus spp. in northern Australia. Diagnosis. Male. Wings hyaline. Clypeus emarginate; posterolateral angles of T7 not upturned. Similar to U. bertholetiensis and U. borrolooliensis which have the posterolateral angles of T7 upturned.

Head. Weakly emarginate posteriorly, not narrowed behind eyes; clypeus narrowly and deeply emarginate, narrowly convex, weakly sagittally carinate, closely punctate; antennal prominence strongly produced, produced below carina to antennal insertions; frons not transversely carinate, rugose-punctate, weakly sagittally carinate on lower half, not depressed; vertex and gena closely punctate.

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

Metasoma. Cylindrical; T1–6 closely punctate, T2–3 sparsely punctate posteriorly; S1–2 rugose-punctate, S3–7 closely punctate; gradulus straight and scrobiculate on T2–6 and S3–7, obscure on S7; T1 oblique anteriorly, not tuberculate; S1 medially raised, anterior Y-shaped carina weakly produced ventrally; S2 not tuberculate; epipygium emarginate and carinate posteriorly; hypopygium with rounded basal angles; cuspis digitate; paracuspis long.

Length. Body 8-10 mm; fore wing 6-7 mm; hind wing 4-5 mm.

Diagnosis. Female. Integument black with legs and metasoma dark brown. Vertex depressed posteromedially; anterior angles of pronotum produced; T6 spinose laterally.

Head. Subquadrate; clypeus truncate, weakly sagittally carinate; vertex longitudinally punctate, strongly medially depressed; gena closely punctate; mandibles unidentate.

Mesosoma . Pronotum strongly convex, weakly depressed near posterior angles, anterior angles produced, punctate mesoscutellum; strongly convex, narrowed posteriorly, sparsely punctate; propodeum medially convex, laterally depressed, sparsely punctate dorsally, impunctate laterally with a narrow closely punctate dorsal margin.

Metasoma. T1-5 and S1-5 closely longitudinally punctate becoming longitudinally rugose-punctate on T2-3; T1 with anterior angles not subtuberculate; T5 not produced; T6 subtriangular, spinose, longitudinally carinate.

Length. Body 7 mm.

Distribution. Cape York Peninsula, Queensland. The exact type locality is not known.

Material examined. Queensland: Lectotype ɗ Cape York, May.1902, BMNH; paralectotype & mounted with lectotype, BMNH; 1ɗ 1& same data as lectotype (NSWDPI).