Heydenia testacea Yang, 1996

Heydenia testacea Yang, 1996

( Figs 8D View FIGURE 8 , 9C, D View FIGURE 9 , 12 View FIGURE 12 )

Heydenia testacea Yang, 1996: 95‒96 , 310.

Material examined. INDIA: Karnataka, Gudibande, Chikkaballapur , 19.vii.2024, coll. Hemanth ( 1♀ on card) ; Karnataka, Kolar, Kailasagiri , 12.ix.2023, coll. Hemanth ( 1♂ on card) ; Karnataka, Ramanagara , 05.vii.2025, coll. Hemanth ( 2♀ and 1♂ male on separate cards) ; Himachal Pradesh, Hamirpur , 20.xi.2024, coll. Adarsh ( 1♀ female on card) .

Diagnosis. FEMALE. Body length 1.9–3.4 mm; face with a transverse patch of thick white setae ( Fig. 12A View FIGURE 12 ) (without iridescent lanceolate setae); POL 2.5× OOL; gena reticulate ( Fig. 12C View FIGURE 12 ); antenna with clava subequal to combined length of preceding four segments ( Fig. 12A, C View FIGURE 12 ); lateral panels of pronotum smooth ( Figs 12E View FIGURE 12 , 9D View FIGURE 9 ) and angled at about 90° to the dorsal surface ( Fig. 12D View FIGURE 12 ); axillae smooth and shiny with weak, shallow reticulation ( Fig. 12D View FIGURE 12 ); dorsellum smooth and shiny ( Fig. 12F View FIGURE 12 ); propodeal plical region with median carina projecting upwards in the middle ( Figs 9D View FIGURE 9 , 12E View FIGURE 12 ) and with two oblique carinae together forming a ‘Y’ shape ( Fig. 12F View FIGURE 12 ); profemur with ventral margin distally and protibia with dorsal margin lacking distinct spines ( Fig. 12G View FIGURE 12 ); fore wing with basal cell bare, infuscation near STV broadly rectangular with a circular spot below ( Fig. 12I View FIGURE 12 ); metasoma with petiole distinctly wider than long ( Fig. 12H View FIGURE 12 ), 1.6–2.0× as wide as long, Gt 1 with posterior margin straight and Gt 2 with posterior margin medially produced ( Fig. 12J View FIGURE 12 ); ovipositor sheath 0.5× length of metatibia ( Fig. 9D View FIGURE 9 ).

MALE. Similar to female but body length 1.6–2.0 mm; infuscation near STV broad but not rectangular (ending nearly before the anterior half); metasoma with petiole only slightly wider than long, 1.2–1.3× as wide as long and Gt

1

distinctly narrowly elongated (tubular).

Variation. POL 3.0–3.4× OOL (females), POL 3.0–3.1× OOL (males).

Biology. Yang (1996) reported the species to be parasitic on larvae of Sphaerotrypes coimbatorensis Stebbing, 1906 ( Coleoptera : Curculionidae ) on Juglans regia L. ( Juglandaceae ), and on Scolytus seulensis Murayama, 1930 and S. japonicus Chapuis, 1875 ( Coleoptera : Curculionidae ) on Prunus persica L. Batsch. ( Rosaceae ). In the present study, specimens (from Karnataka) were reared from branch cuttings of Pongamia pinnata (L.) Pierre. ( Fabaceae ).

Distribution. China ( Jiangsu, Shaanxi) ( Yang 1996), India (new records: Himachal Pradesh and Karnataka).

Comments. The specimens newly collected from India match the description of H. testacea by Yang (1996) in having the head and mesosoma testaceous, the toruli located distinctly below the lower orbit of the eyes, and with a transverse patch of thick white setae below, the fore wing with a small spot close to the broad infuscation below the stigmal vein (fig. 157 in Yang 1996), the propodeal plical region with the median carina projecting upwards in the middle and with two oblique carinae together forming a ‘Y’ shape (fig. 20 in Yang 1996), and the ovipositor sheath short, in dorsal view 0.1× the length of the metasoma. Our specimens differ from that described for H. testacea only in having different POL: OOL measurements (POL 3.0–3.4× OOL).