Torymus orientalis ( Masi, 1926 )

Matsuo, Kazunori, Yang, Man - Miao, Tung, Gene - Sheng, Tokuda, Makoto & Yukawa, Junichi, 2012, Description of a new and redescriptions of two known species of Tor ym u s (Hymenoptera: Torymidae) in Taiwan with a key to Taiwanese species, Zootaxa 3409, pp. 47-57 : 54-56

Torymus orientalis ( Masi, 1926)

Figs 21–29

Diomorus orientalis Masi, 1926: 2 ; Bouček, 1988: 147. Macrodontomerus silvifilia Girault, 1927: 555 . Diomorus silvifilia ; Baltazar, 1966: 136.

Material examined. Lectotype: 1Ƥ, collected by H. Sauter on 7 July 1911 from Taihorin, Taiwan ( DEI). Paralectotypes: 13, same data as the Lectotype ( DEI); 1Ƥ, collected by H. Sauter from Taihorin, Taiwan ( DEI); 13, collected by H. Sauter in 1912 from Kankau, Koshun, Taiwan ( DEI).

Other specimens: 1Ƥ, collected by M. Hayat on 29 March 1966 from Aligarh, India ( BMNH); 1Ƥ, collected by Y.-C. Lin on 5 January 2010 from Hsinchu Co, Cyonglin, Taiwan ( ELKU); 2Ƥ, collected by R. Turner from Mackay, Queensland, Australia ( BMNH); 1Ƥ, collected by Z. Bouček on 20 December 1982 from Port Moresby, Papua New Guinea ( BMNH).

Redescription. FEMALE ( Fig. 21 ). Body length excluding ovipositor sheath 4.6–5.0 mm. Head bluish green. Scape yellow; pedicel and flagellomeres black. Mesosoma bluish green. Fore wing with brownish cloud around stigmal vein. All coxae and femora concolorous with mesosoma; fore and mid tibiae yellow; hind tibia yellow in basal half. Metasoma bluish green.

Head 2.4–2.5× as wide as long in dorsal view; temples about 0.2× as long as dorsal length of eye; POL 1.5–1.7× OOL; OOL 1.3–1.4× OD. Head 1.2–1.3× as wide as high in frontal view ( Fig. 22 ); eyes separated by their height; malar space 0.3–0.4× height of eye; mouth 1.7–2.1× malar space; clypeus with apical margin truncate; mandible with three teeth. Antenna ( Fig. 23 ) not clearly clavate; scape 0.5–0.6× as long as height of eye, not reaching anterior ocellus; combined length of pedicel and flagellomeres about 1.2× width of head; pedicel 1.3–1.5× as long as wide; anellus 1.1–1.3× as wide as long; F1–F5 1.0–1.2× as long as wide; F6 and F7 quadrate; longitudinal sensilla numerous, each segment bearing longitudinal sensilla arranged in three or four irregular rows.

Mesosoma 1.9–2.0× as long as wide; mesoscutum ( Fig. 24 ) with distinct piliferous punctures, transversely striate; axilla smooth with distinct piliferous punctures; notaulus distinct; scutellum ( Fig. 25 ) 1.1–1.3× as long as wide, with large piliferous punctures; frenal area indicated by a distinct frenal line, smooth; dorsellum without median carina; propodeum ( Fig. 26 ) smooth; lower mesepimeron 1.0–1.3× as long as wide. Fore wing 2.5–2.6× as long as wide ( Fig. 27 ); costal cell 7.0–8.5× as long as wide, on upper surface with a setal row in distal half, on lower surface with a setal row and scattered setae apically; basal cell completely open below, bare; speculum widely open below; relative length of marginal vein: postmarginal vein: stigmal vein = 6.8: 4.2: 1.0; stigmal vein weakly petiolate. Hind coxa 2.4–2.7× as long as wide, dorsally with carina extending half length and with sparse setae, bare in basal one-third; hind femur ( Fig. 28 ) with a tooth ventrally in apical part, 4.2–4.5× as long as wide; hind tibia with longer spur 0.8–1.1× as long as width of hind tibia, 0.3–0.5× length of basitarsus, and shorter spur about 0.8× length of longer spur.

Metasoma slightly shorter than mesosoma; posterior margin of metasomal tergum five entire; tip of hypopygium situated at about 0.5 length of metasoma; ovipositor sheath as long as mesosoma, 1.3–1.5× as long as hind tibia.

MALE. Differs from female as follows. Body length 4.0– 4.2 mm. POL about 2.0× OOL; OOL 1.0–1.2× OD. Antenna ( Fig. 29 ) not clearly clavate; combined length of pedicel and all flagellomeres 1.3–1.6× width of head.

Distribution. This species has been recorded from Australia, Papua New Guinea ( Bouček 1988), India ( Farooqi 1986), Philippines ( Girault 1927), and Taiwan ( Masi 1926).

Host information. Torymus orientalis attacks larvae of Hypsipyla robusta ( Lepidoptera : Pyralidae ), which is one of the most serious pests of the Australian red cedar, Toona ciliata Max Roemer (Meliaceae) ( Kazmi & Chauhan 2003; Cunningham et al. 2005; Cunningham & Floyd 2006).

Remarks. Torymus orientalis is most similar to T. cupreus because of the following shared features: antenna not clearly clavate and scape not reaching anterior ocellus. Females of T. cupreus have two or three irregular rows of longitudinal sensilla on the each funicle segment, dense setae on the dorsal surface of the hind coxa, a ventrally closed and sparsely setose basal cell, a small and ventrally closed speculum, and brownish hind tibia. Torymus orientalis can be distinguished from T. cupreus by the following features: each funicle segment with longitudinal sensilla arranged in three rows; dorsal surface of hind coxa with sparse setae, except bare in basal one-third; basal cell of fore wing completely open below, bare; speculum widely open below; and hind tibia yellow in basal half.

Figures

FIGURE 21. Female of Torymus orientalis.

FIGURES 22 – 29. Torymus orientalis: 22, Ƥ head, frontal view; 23, Ƥ antenna; 24, Ƥ mesoscutum; 25, Ƥ scutellum; 26, Ƥ propodeum; 27, Ƥ fore wing, upper surface; 28, Ƥ hind femur; 29, 3 antenna. Scale bars: 22 – 26, 29 0.5 mm; 27, 28 1.0 mm.