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