Parischnogaster nigerrima Selis, 2018

Selis, Marco, 2018, Notes on the subfamily Stenogastrinae (Hymenoptera: Vespidae) in the Philippine Islands, with description of nine new species, Zootaxa 4514 (3), pp. 383-410 : 404-405

Parischnogaster nigerrima Selis , sp. nov.

( Figs. 58–62 )

Diagnosis. This new species is similar to P. timida (Williams) , from which it can be recognized by having: larger size, the scutellum entirely black, and the apical propodeal spots small or absent.

Material examined. HOLOTYPE, ♀ labeled “ Philippines, Luzon, Ifugao, Banaue / V.2015 / Leg. local collector // Parischnogaster / nigerrima sp. nov. HOLOTYPUS ♀ / det. Marco Selis 2015 ” ( MSNVE) . PARATYPES: PHILIPPINES: LUZON: Banaue , VIII.2015, leg. local collector, 1♀ (MSVI).

Description. Female. Body length 11.9–12.8 mm (holotype 12.8 mm); fore wing length 10.0– 10.2 mm (holotype 10.2 mm).

Head 1.4× as wide as long in frontal view ( Fig. 60 ). Clypeus elongate ventrally, 1.1× as long as wide, strongly pointed apically, anterior margin crenulate, flattened basally and weakly concave apically in lateral view. A weak carina runs from interantennal area to anterior ocellus. Distance between ocelli shorter than ocellar diameter. Mandibles tridentate, median tooth with outer margin strongly curved. Antenna thickened towards apex, antennal scape 3× as long as its apical width, F1 3.6× as long as its apical width, F2–F9 longer than wide, F10 bullet shaped, 1.4× as long as basal width ( Fig. 61 ).

Mesoscutum as long as width between tegulae, notaulices very faint and similar to short and shallow depressions, parapsidal sulci clearly marked and very strong posteriorly, strongly convex in lateral view. Scutellum strongly convex. Metanotum weakly convex, almost entirely vertical. Propodeum weakly convex basally, then straight to the apex, longitudinal median furrow complete from anterior to posterior margin and wider apically ( Fig. 62 ).

T1 7× as long as maximum width, dorsal outline almost straight from base to apex in lateral view. T II shortly petiolate and broadening suddenly behind petiole.

Clypeus covered by dense small punctures with some bigger ones bearing long golden bristles. Frons and vertex irregularly reticulate. Genae almost smooth. Pronotum reticulate anterodorsally, strongly striate on lateral faces. Mesoscutum strongly and irregularly reticulate. Scutellum strongly and densely punctate. Metanotum smooth, with some striae on posterior margin. Propodeum very coarsely reticulate, with some coarse striae on dorsal corners and at apex. Mesepisternum irregularly reticulate-striate, coarser on dorsal half. Metaepisternum entirely transversely striate. Metasoma smooth, without punctures. Head and mesosoma covered in silvery pubescence and dense erected black bristles. All terga and sterna with very short coricate black hairs, S2–S5 with longer hairs apically.

Color. Black; following parts dark reddish-brown: apex of clypeus, mandibles, scape and flagellum beneath, anterior half and ventral margins of pronotum, legs; following parts yellow: four spots on pronotal collar, median portion of posterior margin of pronotum, approached spots on metanotum, lateral spots on base of T1, apex of all femora, small basal spot on all tibiae, line on lateral face of fore tibia. Wings hyaline, weakly infuscate apically.

Male. Unknown.

Distribution. Philippine Islands: Luzon.

Etymology. The specific name is in reference to the almost wholly black coloration of this species.

Figures

FIGURES 58–62. Parischnogaster nigerrima Selis, sp. nov., ♀. 58, Habitus in dorsal view. 59, Habitus in lateral view. 60, Head in frontal view. 61, Antenna in lateral view. 62, Propodeum in posterodorsal view.