Toxomerus undecimpunctatus (Enderlein)

Borges, Zuleica M. & Couri, Marcia S., 2009, Revision of Toxomerus Macquart, 1855 (Diptera: Syrphidae) from Brazil with synonymic notes, identification key to the species and description of three new species 2179, Zootaxa 2179, pp. 1-72 : 57-58

Toxomerus undecimpunctatus (Enderlein)

( Figs. 161–163)

Mitrosphen undecimpunctata Enderlein, 1938: 228 (descr.).

Mesograpta undecimpunctata Fluke, 1956: 232 (cat.)

Toxomerus undecimpunctatus Thompson et al., 1976: 55 (cat. & n. comb.); Metz & Thompson, 2001: 228, 249 (key & redescr.).

Diagnosis. Face 1/3 as long as eye width, yellow; frontal triangle yellow. Proepimeron yellow; scutum black except broadly yellow laterally; scutellum yellow to brownish with yellow margins, yellow and black pilose; anepimeron yellow; katepimeron yellow anterodorsally; katatergum yellow anteriorly. Femora and tibiae yellow. Wing extensively microtrichose; alula broader than cell BM appically, microtrichose. Abdomen with isolated lateral brown puncta on 3 rd – 5 th terga. Surstylus almost all with the same width, a little narrower basally, with long setae on dorsal surface; postanal process little distinct; aedeagus enlarged, proeminent dorsally; superior lobe somewhat rectangular, acuminated dorsally, with hairs in distad anteroventral margin, with small lobe ventrally with some hairs. Female genitalia: 9 th tergum with somewhat oval black macula straight posteriorly; epiproct somewhat rounded; cercus slender; hypoproct as a rounded arch; 9 th sternum as in Fig. 162; two oval spermatecae similar in size ( Figs. 161–163).

Length. Body 10.4–10.6 mm, wing 7.6–8.0 mm.

Material examined. BRAZIL. Santa Catarina: Nova Teutônia , 2 ♂, XI/1969, F. Plaumann ( CNC) . PARAGUAY. Areguá : ♀, 31/X/1980, D. D. Lowrie ( USNM) . ARGENTINA. Entre Rios: Pronunciamiento ♀, XII/1966, F. Walz ( USNM) .

Geographical record. Southeastern Brazil, northeastern Argentina and Paraguay.