Parischnogaster nigriterga 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 : 405-408

Parischnogaster nigriterga Selis , sp. nov.

( Figs. 63–67 )

Diagnosis. The female of this species can be recognized by the following combination of characters: T1 shortly petiolate, notauli distinct, clypeus with short and thin yellow lateral bands, T5 without lateral yellow spots, propodeal striae continuing from posterior face to lateral faces, scutellar spots small, and metanotal spots separated.

Material examined. HOLOTYPE, ♀ labeled “PH—Luzon, Rizal, Tanay / IV.2016 / leg. local collector // Parischnogaster / nigriterga sp. nov. HOLOTYPUS ♀ / Det. Marco Selis 2016” ( MSNVE)” PARATYPES: PHILIPPINES: LUZON: North Luzon , Benguet, XII.2013, leg. local collector, 1♀ ( MSVI).

Description. Female. Body length 11.3–12.0 mm (holotype 12.0 mm); fore wing length 9.2–9.7 mm (holotype 9.2 mm).

Head 1.3× as wide as long in frontal view ( Fig. 65 ). Clypeus elongate ventrally, 1.1× as long as wide, strongly pointed apically, anterior margin crenulate, flattened basally and weakly concave apically in lateral view. Distance between ocelli slightly shorter than ocellar diameter. Antenna thickened towards apex, antennal scape 3× as long as its apical width, F1 2× as long as its apical width, F2–F5 slightly longer than wide, F6–F9 transverse, F10 bullet shaped, 1.4× as long as basal width ( Fig. 66 ).

Mesoscutum as long as width between tegulae, moderately convex in lateral view, notauli present as distinct furrows, parapsidal sulci weak and present as smooth longitudinal areas. Scutellum strongly convex basally. Metanotum weakly convex, almost entirely vertical. Propodeum straight from base to apex in lateral view, longitudinal median furrow complete from anterior to posterior margin, deep and wide from base to apex ( Fig. 67 ).

T1 6.5× as long as maximum width, dorsal outline almost straight from base to apex in lateral view, very weakly depressed before apical bulge. T2 shortly petiolate and almost flattened dorsally.

Clypeus densely covered by shallow big punctures. Frons and vertex irregularly reticulate. Genae almost smooth. Pronotum weakly but densely punctate anterodorsally, strongly striate on ventral corners. Mesoscutum regularly striate, with a circular pattern. Scutellum with scattered shallow punctures. Metanotum smooth. Propodeum strongly striate, some punctures on lateral angles. Mesepisternum irregularly striate dorsally, finely punctate ventrally. Metaepisternum smooth, with extremely weak striae dorsally. Metasoma smooth, almost without punctures. Face and mesosoma covered by short golden bristles, sparser on mesosoma. Long golden haris on clypeus, propodeum and T1, thicker on clypeus. Black bristles on vertex, mesoscutum and scutellum.

Color. Black; following parts yellow: short lateral band on clypeus, ventral face of scape, pronotal collar, posterodorsal margin of pronotum, small spots at anterior corner of scutellum, anterior divided spots on metanotum, ventral third of posterior face of propodeum, triangular spot below base of wing on mesepisternum, lunate mark below transverse furrow, posterodorsal spot on metaepisternum, lateral spots on petiole of T2, basolateral spots on T3, lateral rounded spots on S2–S3, outer face of fore legs, apical spot on mid and hind femora, outer face of mid tibia.

Male. Unknown.

Distribution. Philippine Islands: Luzon.

Etymology. The specific name is in reference to the dark coloration of the last terga, in contrast to other species of the genus that present yellow spots.

Figures

FIGURES 63–67. Parischnogaster nigriterga Selis, sp. nov., ♀. 63, Habitus in dorsal view. 64, Habitus in lateral view. 65, Head in frontal view. 66, Antenna in lateral view. 67, Propodeum in posterodorsal view.