Toxomerus laenas (Walker)

Mengual, Ximo, 2011, Black-tie dress code: two new species of the genus Toxomerus (Diptera, Syrphidae), ZooKeys 140, pp. 1-26 : 14

Toxomerus laenas (Walker) Figures 1225

Syrphus barbulus Walker 1852: 238. Type locality: Brazil [HT ♀, BMNH].

Syrphus laenas Walker 1852: 241. Type locality: Brazil [HT ♂, BMNH].

Mesogramma nitidiventris Curran 1930: 9. Type locality: Brazil, Espirito Santo, Vitoria [HT ♂, AMNH].

Mesogramma vitrea Hull 1941: 45. Type locality: Brazil, São Paulo, Juquia [HT ♂, CNC].

Differential diagnosis.

Species with yellow face in male and female with a medial, very broad, black vitta, gena black. Scutum black, green-gray pollinose with a medial white pollinose vitta, dark laterally. Postpronotum black, sometimes brownish posteriorly. Scutellum black, sometimes with apical margin yellow, pale pilose. Wing bare on anterior margin of cells R, BM and CuP and cell R1 basally. Abdomen shiny black, pale pilose; sometimes becoming reddish-brown apically. Male genitalia with postanal process short, little distinct, much less than half as long as surstylus.

Length

(5): body, 6.2-6.8 (6.6) mm; wing, 5.7-6.1 (5.8) mm.

Distribution.

Venezuela, Brazil, Paraguay*.

Material examined.

♂ holotypeof nitidiventris, Non-type material: 12♂ 9♀.