Genea jaynesi ( Aldrich, 1932 )

Nunez, Enio & Couri, Márcia S., 2011, Revision Of Neotropical Genea Rondani (Diptera, Tachinidae, Tachininae, Leskiini), Papéis Avulsos de Zoologia 51 (31), pp. 481-497 : 487-488

Genea jaynesi ( Aldrich, 1932)

( Figures 12-16 )

Leskiomima jaynesi Aldrich, 1932: 17 (original description of male and female, 12 reared from Diatraea saccharalis – Lepdopidoptera – Pyralidae ); Townsend, 1939: 224-225 (genus description).

Jaynesleskia jaynesi ; Townsend, 1934: 395 (comb. nov.); Guimarães, 1971: 117 (catalogue).

Genea jaynesi ; Wood, 1987: 1264 (comb. nov.); O’Hara & Wood, 1998: 761 (comb. nov. formalized).

Males and females alike with 2 pairs of reclinate orbital setae and 2 pairs of proclinate orbital setae; claws and pulvilli short in either sex; abdomen yellow with medial basal upside-down triangular brown spots on T 1+2 to T 5; T 1+2 not excavate to its hind margin; 1 pair of median marginal setae on T 3 and narrow white pruinose band on the basal margin of T 3 to T 5.

Male: Body length, 7.5-8.5 mm; wing, 6.0-7.0 mm.

Head: White, golden near vertex; ocellar setae divaricate; eyes bare; 5-6 pairs of sparse and crossed setae, 1-2 pairs below the level of the antennal inserction; eyes bare; antennal inserction slightly above eye middle; gena with 1/4 of the eye length; palpus slightly clavate and similar in length with antenna; proboscis long, mentum 1.5 times the head height ( Fig. 12 ); frons with 0.5 of the head width at the level of the anterior ocellus; antenna yellow; flagellomere brown, yellow on base; arista short plumose; 6-8 pairs of subvibrissal setulae, shorter near vibrissa; 1-2 pairs of setulae above the vibrissa; palpus yellow, clavate, similar in length with antenna; occiput slightly convex.

Thorax: Brown in ground colour with golden pruinosity; dorsocentrals 3+3; post-umerals 1+2; scutellum with 1 pair of basal setae, 1 pair of subapical setae and 1 pair of discal setae near the apex; pleura with dense golden pruinosity. Wing slightly infuscated, calypter hyaline; vein R 1 setulose basally (1-3 hairs) and vein R 4+5 setulose from base almost to crossvein r-m ( Fig. 13 ). Legs yellow and tarsus brown; fore tibia with 2-3 long posterodorsal setae on middle third; 1 anterodorsal and 1 dorsal subapical seta; 1 anteroventral, 1 ventral and 1 posteroventral apical seta each; claws and pulvilli short; mid femur 1-2 anterior setae on middle third; 1-2 posterodorsal setae on apical third; mid tibia with 1 strong anterodorsal seta on middle third; 2-3 sparse posterodorsal on middle third; 1 ventral seta on middle third; 1 anterodorsal and 1 anteroventral subapical seta each; 1 ventral, 1 posteroventral and 1 posterodorsal apical seta each; hind femur with one anteroventral row of setae on basal half and 1 seta on apical third; one posteroventral row of setae on basal half; 1-2 posterodorsal setae on apical third; hind tibia with 2-3 posterodorsal setae on middle third; 2-3 ventral setae, the apicad the largest; 1 anterodorsal and 1 posterodorsal subapical seta each; 1 anteroventral and 1 posteroventral apical seta each.

Abdomen: Yellow with medial basal upside-down triangular brown spots on T 1+2 to T 5; T 1+2 not excavate to its hind margin; 1 pair of median marginal setae on T 3 and a narrow white pruinose band on the basal margin of T 3 to T 5.

Male terminalia ( Figs. 14-16 ): Sternite 5 as described for genus; cerci tip slightly curved inward; surstylus similar in length with cerci with short setulae turned upwards on its apical half; distiphallus with lateral arms short; pregonite triangular in lateral view; postgonite narrow in lateral view with few setulae on it.

Female: Similar to male.

Type material: Holotype male (n43062). ARGENTINA. Tucuman, 14.iii.1930, Jaynes, H.A. col., ( USNM) ; Paratypes: n43062, 1 female, 11.ii.1930, [borer in dead heart – jan 1930] ( USNM) ; 1 male, 21.ii.1930 ( USNM) ; 1 male, 08.ii.1930 ( USNM) ; 1 female, 21.ii.1930 ( USNM) ; 1 female, 16.ii.1928 [reared by Box, H.E.] ( USNM) ; 1 female, 15.xii.1928 [ Diatraea saccharalis field cage], Jaynes, H.A. col. ( USNM) ; 1 female, 28.xi.1928 [ Diatraea saccharalis field cage], Jaynes, H.A. col. ( USNM) ; 2 females, 29.i.1930 [borer in dead heart – jan 1930] ( USNM) ; 1 female, 01.ii.1930 [borer in dead heart – jan 1930] ( USNM) .

Other material examined: VENEZUELA. Guarico: El sombrero, 175 m, 1 male, 24.vii.1951, Guagliumi, P. & Flores, S. col. [parasite of Diatraea impersonatella on Paspalum paniculatum (USNM) ; Apure Bruzuaz, 100 m, 1 female, 31.i.1950, Box, H.E. col. Van Emden det. [parasite of Diatraea on Andropogon bicornis ] ( USNM); COLOMBIA. Rio Paila, 1 male, 20.i.1965, Jaramillo, T. col. ( USNM); 1 female, 17.ii.1965, Jaramillo, T. col. ( USNM); 1 female, 06.ii.1965, Jaramillo, T. col. ( USNM); 5 males and 8 females, with the same following data, Ingenio Rio Paila, 07.vii.1975, Gaviria col. ( MZSP); BRAZIL. Mato Grosso do Sul: Maracaju, 1 male, ii.1937 [near Jayneslekia Townsend, C.H.H.] ( USNM); 1 male, ii.1937 ( USNM); 1 male, iii.1937, Serviço Febre Amarela M.E.S. ( USNM), Bras.; URUGUAI. Artigas: Bella Union, 1 male and 1 female, i.1988, [in Lab. de Diatraea saccharalis ], Morey, C.S. ( USNM).

Geographic distribution: Brazil, Argentina, Venezuela, Colombia (last two, new records).

Comments: There are records of parasitism on 2 pyralids: Diatraea impersonatella Walker, 1863 and Diatraea saccharalis Fabricius, 1794 .

Figures

FIGURES 12‑16: Genea jaynesi (Townsend), 12. Head, lateal view; 13. Wing, dorsal view; 14. Epandrium, cerci and surstyli, posterior view; 15. Epandrium, cerci and surstyli, lateral view; 16. Aedegal complex, lateral view. Figures 17-21: Genea major (Townsend), 17. Head, lateral view; 18. Sternite 5; 19. Epandrium, cerci and surstyli, posterior view; 20. Epandrium, cerci and surstyli, lateral view; 21. Aedegal complex, lateral view.