Pison oresbios 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 : 521-523

Pison oresbios Pulawski , species nova

Figures 1261-1267.

NAME DERIVATION.– Oresbios is a Greek word meaning living in or on mountains; with reference to this species origin in Torricelli Mountains of New Guinea.

RECOGNITION.– Pison oresbios is the only New Guinean species with a red gaster combined with the second recurrent vein interstitial with the second intersubmarginal vein or nearly so. Additional recognition features are: clypeal lamella of equal length medially and laterally (Fig. 1261), mesopleural punctures markedly larger ventrally than dorsally (Fig. 1263), and tibiae without spines.

DESCRIPTION.– Frons dull, with well-defined, medium-sized punctures, punctures averaging less than one diameter apart (a few sublateral punctures below midocellus more than one diameter apart). Occipital carina joining hypostomal carina. Gena relatively narrow in dorsal view (Fig. 1262). Labrum not emarginate. Anteromedian pronotal pit transversely elongate, about as long as midocellar diameter. Scutum not foveate along flange, without short longitudinal ridges adjacent to posterior margin; scutal punctures conspicuous, of medium size, mostly less than one diameter apart (several posterolateral punctures more than one diameter apart); interspaces microsculptured. Tegula slightly enlarged. Mesopleural punctures fine dorsally but conspicuous ventrally (where punctures are more than one diameter apart), of varying size anterior of episternal sulcus; interspaces microsculptured (Fig. 1263). Postspiracular carina absent. Metapleural sulcus costulate between dorsal and ventral metapleural pits. Propodeum with longitudinal carina separating side from dorsum and posterior surface and extending from gastral socket area toward spiracle; dorsum transversely ridged, punctate between ridges (Fig. 1264); side punctate, punctures less than one diameter apart anteriorly, more than one diameter apart posteriorly, interspaces merging into ridges that are visible only from certain angles; posterior surface conspicuously transversely ridged, punctate between ridges. Posteroventral forefemoral surface minutely punctate, punctures varying from one to several diameters apart. Hindcoxal dorsum with outer margin obtusely carinate. Outer surface of all tibiae without spines. Punctures of tergum I averaging several diameters apart on horizontal part anterad of apical depression. Sternum II punctate throughout, punctures conspicuous except fine apically.

Setae pale golden on clypeus and lower frons, brown on upper frons, thorax, and propodeum; appressed on most of postocellar area, scutum, and tergum I; not concealing integument on clypeus; on lower gena suberect, straight, up to 0.8 × midocellar diameter. Apical depressions of terga with ill-defined, golden setal fasciae.

Head, thorax, and propodeum black, with the following ferruginous: clypeal lamella, scape, pedicel, flagellomeres I and II, and mandible (except apically). Femora black; foretibia ferruginous, midtibia ferruginous except black basally, hindtibia black except ferruginous apically; tarsi ferruginous. Gaster all ferruginous.

♀ (Fig. 1266).– Upper interocular distance equal to 0.76 × lower interocular distance; ocellocular distance equal to 1.0 × hindocellar diameter, distance between hindocelli equal to 0.7 × hindocellar diameter; eye height equal to 0.90 × distance between eye notches. Free margin of clypeal lamella of equal length medially and laterally (Fig. 1261). Dorsal length of flagellomere I 2.6 × apical width, of flagellomere IX

1.3 × apical width. Mandible: trimmal carina with small incision at about two thirds of length. Tergum VI pointed (Fig. 1264). Length

9.8 mm; head width 2.3 mm.

♂.– Unknown.

GEOGRAPHIC DISTRIBUTION (Fig. 1267).–

Known from one locality in northwestern

Papua New Guinea.

RECORDS.– HOLOTYPE: ♀, PAPUA NEW

GUINEA: Sandaun Province: Mokai Village in

Torricelli Mountains, 1-23 Jan 1959, W.W. Brandt FIGURE 1267. Collecting locality of Pison oresbios (BISH) . Pulawski, sp. nov.