Genea trifaria ( Wiedemann, 1824 )

Nunez, Enio & Couri, Márcia S., 2011, Revision Of Neotropical Genea Rondani (Diptera, Tachinidae, Tachininae, Leskiini), Papéis Avulsos de Zoologia 51 (31), pp. 481-497 : 494-496

Genea trifaria ( Wiedemann, 1824)

(Figures 31-35)

Stomoxys trifaria Wiedemann, 1824: 41 (original designation); 1830: 250-251 (redescription).

Genea maculiventris Rondani, 1850: 173-174 (original designation); Aldrich, 1929: 13 (redescription); Townsend, 1931: 90 (junior synonym of the type species Stomoxys trifaria ); Guimarães, 1971: 117 (catalogue – in synonymy with G. trifaria ).

Genea trifaria ; Townsend, 1931: 90 (comb. nov.); James, 1947: 114-115 (redescription); Guimarães, 1971: 117 (catalogue).

Geneoglossa glossata Townsend, 1935: 225 (original designation based on a single female). Genea glossata ; James, 1947: 110 (key), 115 (comb. nov.; suggestion to be synonym of G. trifaria ); Guimarães, 1971: 116 (catalogue). N. SYN.

Male: Body length, 7.0-8.0 mm; wing, 5.5-6.5 mm.

Head: White; fronto-orbital plate and vertex slightly gold; weak ocellars; inner and outer verticals present; eyes bare; vitta yellow; 10-12 pairs of frontal setae, 1-2 pairs below the level of the antennal insertion; frons with 0.25 of head width at the level of the anterior ocellus; antenna yelow, flagellomere brown, yellow on base; arista slightly plumose; 3-5 pairs of subvibrissal setulae, short near vibrissa; 1-2 pairs of setulae above the vibrissa; proboscis long with almost twice the head height; palpus exceptionally long with almost twice the length of the flagellomere (Fig. 31).

Thorax: Ground colour brownish with golden pruinosity; dorsocentrals 3+3; post-pronotals 2 or 3; scutellum yellow with one pair of basal setae, rarely with one pair of weak lateral setae; one pair of subapical setae and one pair of discal setae near the apex; pleura with golden pruinosity. Wing slightly infuscated; vein R 1 entirely setulose on dorsal surface (Fig. 32) and vein R 4+5 setulose dorsally from base to crossvein r-m. Legs yellow, hind tibia slightly brown and tarsus brown; fore tibia with 1 long posteroventral seta on middle third; 1 dorsal subapical seta and 1 anteroventral, 1 ventral and 1 posteroventral apical seta; claws and pulvilli well developed; mid femur with 1 anterior seta on middle third; 1-2 posterodorsal setae on apical third; mid tibia with 1 strong anterodorsal seta on middle third; 1-2 sparse posterodorsal setae on middle third; 1 ventral seta on middle third; 1 anterodorsal and 1 posterodorsal subapical seta each and 1 anteroventral, 1 ventral and 1 posteroventral 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 on middle third, the apicad the largest; 1 anterodorsal and 1 posterodorsal subapical seta; 1 anteroventral and 1 posteroventral apical seta.

Abdomen: Yellow; T 1+2 not excavate to its hind margin; T 1+2 rarely with a median apical brown spot dorsally; triangular median apical brown spot dorsally on T 3 surpassing the median line of this tergite; tip of the triangular median apical brown spot of T 4 also surpassing the median line of this tergite; one pair of median marginal on T 3 rarely on T 1+2; narrow white pruinose band on the anterior margin of T 3, T 4 and T 5.

Male terminalia (Figs. 33-35): Sternite 5 as described for genus; cercal plate not fused and large, apex slightly curved backwards; surstylus shorter than cerci; distiphallus with lateral arms short; pregonite triangular in lateral view with few setulae apically; postgonite narrow in lateral view.

Female: Differs from male as follows: 2 pairs of proclinate orbitals and one pair of reclinate orbitals; frons with 0.35 of the head width at the level of the anterior ocellus; 7-10 pairs of frontal setae, claws and pulvilli short.

Type material: Holotype female of G. glossata (n57293). BRAZIL. Pernambuco: Tapera, 20.x.1932, Geneoglossa glossata Townsend (USNM) .

Other material examined: BRAZIL, Pernambuco: Tapera , 1 male, 11.ix.1935 ( USNM) , Utingo , 1 male, v.1924, [on foliage] ( USNM) , Agrestina, Fazenda Amapá, 1 male, 11-17.vi.1971, ABC ( MZSP) ; Rio de Janeiro: Nova Friburgo, Mury , 1 male, xii.1976, Gred & Guimarães, cols. ( MZSP) ; Resende, Fazenda Penedo , 1 male and 2 females, 21.vii.1959, Lopes col. ( MZSP) ; Angra dos Reis, Japuhyba , 1 male, x.1934, Travassos, L. & Lopes, H.S. cols. ( MZSP) .

Geographic distribution: Honduras, Panama, Venezuela and Brazil.

Comments: The types of G. trifaria and G. maculiventris deposited respectively in the Zoological Museum, University of Copenhagen ( ZMUC) and in the Museo e Instituto di Zoologia Sistematica dell’Universitá di Torino ( MZUT), were not examined. The above description was based on the female type of G. glossata and on males examined by the authors.