Hedychrum crassitarse 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 : 2-5

Hedychrum crassitarse Rosa , sp. n.

http://zoobank.org/NomenclaturalActs/ F4D9EE74-2282-4703-9700-B6085264B533

Figs 1–7

DIAGNOSIS. Hedychrum crassitarse sp. n. is easily recognizable among

Hedychrum species by extremely broad and stocky hind tarsomeres ( Figs 6–7 ).

Although tarsomeres of Hedychrum species are somewhat enlarged, when compared to other Elampini (Kimsey & Bohart, 1991) , none shows so highly modified tarsomeres as this species. Hedychrum crassipes Bischoff, 1910 from

South Africa (type examined in MNHU), according to its name (“with enlarged feet”), has exceedingly enlarged hind femora, yet tarsi are unmodified. Other diagnostic features H. crassitarse sp. n. are: the extremely short, narrow clypeus ;

long, white metasomal setae; second metasomal sternum with large median green spot; third sternum with small green spot apico-medially and unmodified apico-

median margin. It is unknown how many of these features are also to be found in the male.

DESCRIPTION. Female ( Figs 1–7 ). Body length 6.5 mm, forewing 3.6 mm.

Head. Face in frontal view ( Fig. 3 ) length 1.2 mm, width 1.7 mm. Clypeus shortened, reduced to a small area around toruli; subantennal distance very short,

about 0.1 MOD. Scapal basin transversely and finely striated medially; upper scapal basin impunctate and polished. Brow and face between compound eye and scapal basin with deep, subcontiguous, medium-sized punctures (around 0.5 MOD), smaller around midocellus and ocellar area, with two impunctate areas laterally to ocelli;

genae very thin, 0.1 MOD in the narrower point beneath compound eye; genal carina hardly visible; malar space short, 0.2 MOD; mandible large and elongate,

ending in a curved tooth, with two sub-basal lobes on inner side. Ocellar triangle isosceles, the sides much shorter than the base; postocellar line indistinct. Relative lengths of P:F1:F2:F3:F4 = 1.0:1.1:0.9:08:0.8; F5 and following slightly subsquare;

both antennae of type broken, the last 3 flagellomeres of the right and the last 6 of the left missing. Head with sparse, short (1.0 MOD), and erect white hairs, covering the face laterally .

Mesosoma: length 2.5 mm; width (PPW) 1.9 mm. Pronotum elongate (0.7 mm),

1.3 times as long as metanotum; pronotum with deep, even, and small punctures

(0.3 MOD), with narrow interstices, 0.1–1.0 PD apart; very tiny and shallow dots on interstices; larger punctures somehow transversely aligned and subcontiguous.

Mesoscutum with large punctures (0.5 MOD); on lateral lobes of mesoscutum smaller and denser; notauli hardly visible anteriorly, as thin lines; parapsidal lines almost complete; mesoscutellum with rounded and smaller punctures anteriorly,

compared to those on median lobe of mesoscutum, and larger posteriorly with tiny and shallow dots on interstices; metanotum sub-trapezoidal with large (0.8 MOD)

foveate-reticulate punctures; mesopleuron with antero-ventral margin curved, with medium-sized punctures close to wing fossa and larger on ventral margin ( Fig. 2 );

propodeal angles triangular, outwards directed. Mid tibial pit deep and broadly oval,

somehow like the mid tibia of H. niemelai Linsenmaier, 1959 male; hind tibial pit deep, small and elliptical ( Fig. 7 ); hind tarsi 1–4 enlarged, at least three times larger than usual tarsal width ( Figs 6–7 ). Wing venation unmodified, with fore wing medial vein slightly curved and radial sector stub a little longer than stigma; wings brownish. Setae short, light brown.

habitus, lateral view; 3 – head, frontal view; 4 – metasoma, postero-lateral view.

Metasoma: length 2.6 mm. First tergum with small, dense punctures, with narrow interstices (0.1–1.0 PD), and with a narrow, polished strip along posterior margin; second tergum with small, even and dense punctures anteriorly, becoming scattered posteriorly; punctation on third metasomal tergum similar to that of the second one posteriorly. Lateral margin of the third tergum with small lateral tooth

( Fig. 2 ). First metasomal sternum almost impunctate; second sternum densely and minutely punctate, anteromedially polished; third sternum with dense and tiny punctures. Third sternum apico-medially simple, without tooth or projection.

Metasomal terga overall with long (1.5–2.0 MOD), brownish hairs.

– hind leg, anterior view; 7 – hind leg, posterior view.

Colour. Green, blue on: ocellar area, two rounded patches on pronotum, median lobe of mesoscutum, along metanotal margins, anterior and posterior margins of second metasomal tergum. Metasoma ventrally black, with postero-median green spot on second sternum and small median green spot on third one. Scape and pedicel green, flagellum black. Mandible brown, darker at apex, latero-basally metallic green. Legs with metallic green femora and tibiae, except for reddish brown distal end of both, dark brown on inner side of hind leg; fore tarsi reddish brown, mid and hind tarsi dark brown. Tegulae brown.

Male. Unknown.

ETYMOLOGY. The specific epithet crassitarse (adjective) derives from the

Latin adjective crassus (= broad) and the name tarsus; it refers to the broad,

modified tarsomeres.

Figures

Figs 1–4. Hedychrum crassitarse sp. n., female holotype. 1 – habitus, dorsal view; 2 –

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