Pison bimbi Pulawski, 2018

Pulawski, Wojciech J., 2018, A Revision of the Wasp Genus Pison Jurine, 1808 of Australia and New Zealand, New Guinea, and the Pacific Islands (Hymenoptera: Crabronidae), Proceedings of the California Academy of Sciences 65, pp. 1-584 : 110-111

Pison bimbi Pulawski , species nova

Figures 197-200.

NAME DERIVATION.– Bimbi means bird in the Ngunnawal language of the aboriginal Australians who inhabited the Australian Capital Territory area (where one of the specimens was collected); a noun in apposition to the generic name.

RECOGNITION.– The female of Pison bimbi (the male is unknown) has only two submarginal cells, the second one elongate (length of posterior margin 1.8-2.0 × height). The eye is asetose, the gaster is black, the legs are ferruginous, and the tegula is unsculptured posterolaterally. Furthermore, tergum I is not elongate (length no more than apical width), the free margin of the clypeal lamella is evenly rounded (without median point), and the ocellocular distance is smaller than the hindocellar diameter and the interocellar distance ( Fig. 198 ). An aberrant P. prostratum with two submarginal cell is similar, but P. bimbi differs by the following: all frontal setae are oriented dorsally, the pronotal collar is swollen, elongate dorsally, the postspiracular carina is absent, the scutum has no longitudinal ridges adjacent to the posterior margin, the mesopleural vestiture does not conceal the integument, the posteroventral forefemoral surface is impunctate, and the wing membrane is yellowish. In P. prostratum the frontal setae are oriented ventrally in the ventral half, whereas the dorsally oriented setae form a pair of patches just below the midocellus, the pronotal collar is neither swollen nor elongate, the postspiracular carina is present, the scutum has well-defined ridges adjacent to the posterior margin, the mesopleural vestiture conceals the integument, the posteroventral forefemoral surface is all punctate, and the wing membrane is hyaline.

DESCRIPTION.– Head subspherical in dorsal view. Frons shiny, finely punctate, punctures less than one diameter apart; middle supraantennal carina absent. Distance between antennal socket and orbit slightly smaller than socket width. Gena relatively narrow in dorsal view ( Fig. 198 ). Labrum not emarginate. Anteromedian pronotal pit transversely elongate, about twice as long as midocellar diameter. Pronotal collar swollen, elongate dorsally ( Fig. 199 ). Propleuron sparsely punctate near center. Scutum not foveate along flange, without longitudinal ridges adjacent to posterior margin; scutal punctures minute, less than one diameter apart. Scutellum foveate along anterior margin. Tegula enlarged. Mesopleural punctures fine but slightly larger than those on scutum, less than one diameter apart. Postspiracular carina absent. Metapleural sulcus not costulate between dorsal and ventral metapleural pits. Propodeum with irregular longitudinal carina separating side from dorsum and posterior surface and extending from gastral socket area toward spiracle; dorsum finely, obliquely ridged; side minutely ridged, punctate between ridges; posterior surface minutely punctate (punctures contiguous, interspaces merging into minute ridges), with several conspicuous ridges radiating up from transverse carina just above gastropropodeal articulation. Forewing with two submarginal cells; length of posterior margin of second submarginal cell 1.8-2.0 × height. Posteroventral forefemoral surface unsculptured (except apically). Hindcoxal dorsum with outer margin obtusely carinate. Outer surface of hindtibia with evanescent spines. Punctures of tergum I well defined and about one diameter apart anterior to apical depression. Sterna punctate throughout, punctures of sternum II slightly more than one diameter apart mesally.

Setae silvery, appressed and extremely short on frons, postocellar area, gena, thorax, and tergum I, largely concealing integument on clypeus. Apical depressions of terga without setal fasciae.

Head, thorax, propodeum, and gaster black; mandible yellow in basal third, light brown mesally, dark apically; antenna yellowish brown, dark dorsally, apical flagellomere all dark. Femora, tibiae, and tarsi ferruginous.

♀.– Upper interocular distance equal to 1.0 × lower interocular distance; ocellocular distance equal to 0.8 × hindocellar diameter, distance between hindocelli equal to 1.5 × hindocellar diameter; eye height equal to 1.02-1.04 × distance between eye notches. Free margin of clypeal lamella evenly rounded ( Fig. 197 ). Dorsal length of flagellomere I 1.4-1.6 × apical width, of flagellomere IX 0.9 × apical width (flagellomere I shorter than pedicel). Mandible: trimmal carina without incision ( Fig. 197 ). Length 4.6-6.3 mm; head width 1.2-1.5 mm.

♂.– Unknown.

GEOGRAPHIC DISTRIBUTION ( Fig. 200 ).– Known from one locality in New South Wales and another in the Australian Capital Territory.

RECORDS.– HOLOTYPE: ♀, AUSTRALIA: New South Wales: 16 km N Mudgee , 29 Nov 1982, D.S. Horning ( ANIC).

PARATYPE: AUSTRALIA: Australian Capital Territory: Black Mountain at 15°16ˈS 149°06ˈE, M.E. Irwin (1 ♀, CAS) .

Figures

FIGURES 197–299. Pison bimbi Pulawski, sp. nov., female. (197) Clypeus and mandibles; (198) Head in dorsal view; (199) Pronotum in dorsal view. FIGURE 200. Collecting localities of Pison bimbi Pulawski, sp. nov.