Hedychrum migliaccioi, Rosa, 2019

Rosa, P., 2019, Two new species of Hedychrum Latreille (Hymenoptera: Chrysididae) from India and Nepal with review of the genus distribution in Asia, Far Eastern Entomologist 385, pp. 1-11 : 7-8

H. migliaccioi sp. n. can be separated from other bicoloured Palaearctic females by the combination of the following characters: third metasomal sternum with a large,

rounded apicomedial tooth; dark brown, thick and long setae on the apical margin of the third tergum and on third sternum (2.0–2.5 MOD); hind tibial pit deep, small and elliptical; ovoidal metasoma. Apparently the closer species is the Chinese H.

gracile Semenov, 1967, whose metasomal punctation is laterally denser and coarser to subcontiguous and the pronotum is more elongate (see pictures of the type in

Rosa et al., 2017a).

metasoma, postero-lateral view.

DESCRIPTION. Female ( Figs 8 –13). Body length 5.9 mm, forewing 3.9 mm.

Head. Face in full view ( Fig. 10 ), length 1.1 mm, width 1.5 mm. Clypeus apically dark brown, straight; subantennal distance about 1.0 MOD. Scapal basin medially transversely striate; upper scapal basin impunctate and polished. Brow and face between compound eye and scapal basin with small to medium-sized punctures (0.3–

0.5 MOD), smaller and scattered on vertex, around ocellar area, and occiput; genae very thin, 0.1 MOD in the narrower point beneath compound eye; genal carina indistinct; malar space short, 0.2 MOD; mandible falcate and pointed. Ocellar triangle isosceles, the sides much shorter than the base; postocellar line indistinct. Relative lengths of P:F1:F2:F3:F4 = 1.0:1.6:0.9:0.7:0.7; F3 and following subsquare, the last flagellomere elongate. Brow and vertex with thick, erect, and short (1.0 MOD) brown hairs.

Mesosoma: length 2.2 mm; width (PPW) 1.3 mm. Pronotum with deep and ir-

regular, small to medium sized punctures (up to 0.5 MOD), with narrow to large interstices, 0.1–1.0 PD apart; very tiny and shallow dots on interstices. Mesoscutum with larger punctures (0.7 MOD) concentrated postero-medially between notauli;

on lateral lobes of mesoscutum smaller; notauli visible as thin lines; parapsidal lines almost complete; mesoscutellum with rounded punctures (0.7 MOD) along margins,

with small and shallow punctures on interstices; metanotum subtrapezoidal with large

(1.0 MOD) foveate-reticulate punctures; mesopleuron with antero-ventral margin slightly curved, with medium-sized punctures close to wing fossa and larger on ventral margin ( Fig. 9 ); propodeal angles small and triangular, outwards directed.

Mid tibial pit deep almost indistinct, very small and oval, smaller than 1.0 MOD;

hind tibial pit deep, small, and elliptical, similar to Fig. 7 . Wing venation unmodified,

with fore wing medial vein almost straight and radial sector stub as long as 0.5 times the stigma; wings brow. Setae throughout short (1.0 MOD) and brown, slightly erected.

Metasoma: length 2.3 mm. First tergum with small and sparse punctures medially, and with larger, deeper and scattered punctures laterally, 1–3 PD apart; second tergum with small, even and dense punctures anteriorly, becoming larger and scattered posteriorly. Punctation on third tergum similar, denser, with smaller punctures, and rugose interstices. Lateral margin of the third tergum almost continuous, with small lateral tooth ( Fig. 9 ). First metasomal sternum almost impunctate; second sternum minutely punctate, with scattered punctures; third sternum with dense and tiny punctures bearing brown, long setae; apico-medially with a large, rounded projection, somehow similar to the one of H. nobile

(Scopoli, 1763), yet apically rounded. Metasomal terga overall with short (1.0

MOD), whitish hairs, on the apical margin of the third tergum and on third sternum with very long (2.0–2.5 MOD), thick and dark brown setae.

Colour. Head and mesosoma green, with blue colour on ocellar area, occiput,

two rounded patches on pronotum, median lobe of mesoscutum anteriorly; metasoma red to purple dorsally, fully black ventrally. Scape and pedicel matt black; scape with weak green reflections; flagellum black. Mandible dark brown, green metallic baso-laterally. Legs with metallic femora and tibiae, both brownish at distal end;

tarsi dark brown. Tegulae dark brown.

Male. Unknown.

ETYMOLOGY. The species is named after Enrico Migliaccio (Rome, Italy),

who friendly donated the specimen to my father, Vittorio Rosa.

Figures

Figs 8–9. Hedychrum migliaccioi sp. n., female holotype. 8 – habitus, dorsal view; 9 –

Figs 10–11. Hedychrum migliaccioi sp. n., female holotype. 10 – head, frontal view; 11 –

Figs 5–7. Hedychrum crassitarse sp. n., female holotype. 5 – metasoma, ventral view; 6