Chrysis proauriceps Rosa, 2017

Rosa, P., Proshchalykin, M. Yu., Lelej, A. S. & Loktionov, V. M., 2017, Contribution to the Siberian Chrysididae (Hymenoptera). Part 1., Far Eastern Entomologist 341 (341), pp. 1-44 : 20-23

Chrysis proauriceps Rosa , sp. n.

Fig. 11B , 12A–F

SPECIMENS EXAMINED. Holotype – ♂, Russia: Krasnoyarsk Terr., 10 km

NW Minusinsk, Bystraya River, 9.VII 2014 (AL, MP, VL) [ZIN]. Paratype: 1 ♂,

same locality as holotype, 8.VII 2014 (AL, MP, VL) [ PRC] .

DIAGNOSIS. Chrysis proauriceps sp. n. belongs to the leachii species-group.

It’s a small sized species (3.5–4.0 mm long), closely related to Ch. auriceps Linsenmaier, 1959 . The specimens collected (holotype and paratype) are distinctly smaller,

slender and darker compared with males of Ch. auriceps ( Fig. 11A ). However, it’s possible that these features could be related to a local population, because occasionally small and darker male specimens are also observed in males of Ch. leachii

Shuckard, 1837. The Siberian males are anyway distinct by structure of genital capsule ( Fig. 12F ), with short gonostyle, propodeum shape (median area of the metapectal-propodeal complex) and shape of propodeal teeth ( Fig. 11B ). This species is separated by all other Russian species of the leachii species-group by shape of genitalia.

DESCRIPTION. Male. Body length 3.5–4.0 mm. Fore wing length 2.0 mm.

OOL = 2.2 MOD; POL = 2.5 MOD; MS = 1.2 MOD; relative length of P: F1: F2:

F3 = 1.0: 1.3: 0.8: 0.7.

Head. Vertex and frons with large (up to 0.5 MOD), contiguous punctures; TFC

faint; scapal basin broadly microridged, with large punctures along eye margin, malar spaces and genae; subantennal space about 1.0 MOD; in frontal view, malar spaces convergent ( Fig. 12A ).

auriceps Rosa , sp. n., holotype ♂, habitus, dorsal view. Scale bar = 1.0 mm.

Mesosoma. Pronotal groove large, almost reaching the pronotal posterior margin; mesoscutum and mesoscutellum with large, almost contiguous punctures,

their diameter about the same of those on head ( Fig. 12C ). Median area of the metapectal-propodeal complex smaller than in Ch. auriceps , distinctly triangular rather than trapezoidal; punctures of the episternal sulcus as large as or smaller than other punctures of mesopleuron.

Metasoma. Punctuation on T1 and T2 contiguous, with large, shallow punctures,

becoming smaller towards the posterior margin of T2 ( Fig. 12D ); on T3 with uneven,

contiguous punctures; pit row with ten small, deep and round pits; T3 apical margin arched, without distinct median tooth ( Fig. 12E ).

Coloration. Head and mesosoma blue to green, with greenish-coppery reflections on frons; pronotum anteriorly and mesoscutum golden to golden-red, mesoscutellum greenish, somehow contrasting with mesoscutum; metascutellum and propodeum bluish; mesopleuron and legs greenish. Metasoma medially black, without metallic reflections, laterally golden to golden-greenish and blue ( Fig. 12E ) (in the paratype almost entirely blackish); apical margin of T3, after pit row, concolorous with the rest of T3; metasomal sterna black, without distinct spots on S2. Tegulae brown,

without metallic reflections (metallic blue in Ch. auriceps ); tarsi light brown; scape metallic green, pedicel and flagellum black. Wings hyaline, smoky along costal and radial vein.

Vestiture. Body, including legs, evenly covered with whitish, short, erect setae

(1.0 MOD), somewhere laterally a little longer.

Female. Unknown.

DISTRIBUTION. Russia (Krasnoyarsk Terr.).

ETYMOLOGY. The specific epithet proauriceps is derived from the Latin prepo-

sition pro- (“in front of” or “compared with”) and the chrysidid name Ch. auriceps ,

the most similar species in the leachii species-group.

Figures

Fig. 11. A – Chrysis auriceps Linsenmaier, ♂, Italy, habitus, dorsal view; B – Ch. pro-

Fig. 12. A–F – Chrysis proauriceps Rosa, sp. n., holotype ♂: A – head, frontal view; B – mesosoma, lateral view; C – head and mesosoma, dorsal view; D – metasoma, dorsal view; E – metasoma, lateral view; F – genital capsule; G – C. auriceps, genital capsule. Scale bar = 0.5 mm.