Pison subtile 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 : 438-440

Pison subtile Pulawski , species nova

Figures 1063-1070.

NAME DERIVATION.– Subtile, Latin neuter adjective meaning fine, subtle, delicate; with reference to the finely sculptured frons and scutum.

RECOGNITION.– The male of P. subtile (the female is unknown) has three submarginal cells, the second recurrent vein ending on the third submarginal cell, and the setae appressed on tergum I. The apical margin of sternum VIII is slightly convex, not emarginate (Fig. 1067) and, unlike the other species with this character, the mesopleural punctures are more than one diameter apart (rather than linear or compressed against each other), the scutal punctures are minuscule and ill defined (Fig. 1065) rather than larger and well defined, all setae of the frons are oriented dorsally (rather than oriented ventrally in the ventral half of the frons), flagellomeres III and IV are concave basoventrally and expanded apicoventrally (Fig. 1066) rather than cylindrical or insignificantly concave basoventrally), and the tibiae are ferruginous rather than black. The obtusely anguridged. Second recurrent vein ending on submarginal cell III. Punctures of tergum I fine, less than one diameter apart on horizontal part. Sternum II punctate throughout.

Setae silvery, both appressed and erect on frons (appressed setae all oriented dorsally), on scutum sparse, erect, slightly longer than midocellar diameter; on lower gena sinuous, up to two midocellar diameters long; appressed on tergum I; not concealing integument on clypeus. Apical depressions of terga with silvery, setal fasciae.

Head, thorax, propodeum, and gaster black; mandible largely ferruginous mesally. Femora black, tibiae and tarsi ferruginous.

♀.– Unknown.

♂.– Upper interocular distance equal to 0.56-0.62 × lower interocular distance; ocellocular distance equal to 1.1-1.3 × hindocellar diameter, distance between hindocelli equal to 0.9-1.1 × hindocellar diameter; eye height equal to 1.08-1.14 × distance between eye notches. Free margin of clypeal lamella obtusely angulate (Fig. 1063). Venter of flagellomeres III and IV concave basally, convex apically (Fig. 1066). Dorsal length of flagellomere I 2.3-2.5 × apical width, of flagellomere X 1.3 × apical width. Apical margin of sternum VIII slightly convex, not emarginate except concave laterally (Fig. 1067). Genitalia:

Figs. 1068, 1069. Length 8.1-8.9 mm; head width 1.3-1.4 mm.

GEOGRAPHIC DISTRIBUTION (Fig. 1070).–

Known from two localities in New South

Wales.

RECORDS.– HOLOTYPE: ♂, AUSTRALIA: New

South Wales: Little River in Blue Mountains,

21 Nov 1982, N.W. Rodd (AMS).

PARATYPE: AUSTRALIA: New South Wales :

near Bellbrook, [day not indicated] Nov 1990, N.W.

Rodd (1 ♂, CAS) .

FIGURE 1070. Collecting localities of Pison subtile Pulawski , sp. nov.