Toxomerus musicus (Fabricius)

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 : 42-43

Toxomerus musicus (Fabricius)

( Figs. 32, 116, 117, 118)

Scaeva musica Fabricius, 1805: 253 (descr.).

Syrphus musicus Wiedeman, 1830: 143 (redescr.); Williston, 1886: 312 (cat.).

Mesogramma musica Schiner, 1868: 347 (n. comb.); Curran, 1930: 4 (key); 1934: 401 (key); Hull, 1943b: 6, 30 (key & ill.).

Mesograpta musica Williston, 1888: 265 (note); Fluke, 1956: 223 (cat.).

Toxomerus musicus Kertész, 1910: 148 (cat. & n. comb.); Thompson et al., 1976: 52 (cat.); Thompson, 1981: 70 (key).

Male. Head: face 1/3 as long as eye width, yellow, shiny except sparsely white pollinose and pilose laterally; gena black; frontal triangle yellow, white pilose; vertical triangle black, bronze pollinose, black pilose; occiput black, silver pollinose, with thick white pile, with a short row of brownish pile superiorly; antenna yellow, white pilose, arista brown.

Thorax: postpronotum yellow; proepisternum black, white pollinose; proepimeron black; scutum black except broadly yellow laterally, bronze pollinose except for bluish-white pollinose medial vitta, yellow pilose; scutellum yellow, yellow pilose; anterior anepisternum black, long yellow pilose; posterior anepisternum black on anterior 1/2, bare, posterior ½ yellow, yellow pilose; katepisternum black except dorsal 1/3 yellow, dull, yellow pilose; anepimeron black; plumula yellow, calypter yellowish with yellowish fringe; posterior mesothoracic pleuron (katepimeron, meron, katatergum, anatergum and postscutellum) black, anatergum brownish posterodorsally; methatoracic pleuron yellow, except metaepisternum brown; metasternum brown; halter yellow. Legs: pro- and mesocoxae black on basal 2/3, yellow apically, yellow pilose; metacoxa yellow, yellow pilose; trochanters yellow, yellow pilose; pro- and mesofemora yellow, pro- and mesofemora yellow, yellow pilose, mesofemur black pilose on apical 1/3; metafemur yellow except for black annulus on apical 1/ 3, yellow and black pilose; tibiae yellow, yellow pilose; pro- and mesotarsi yellow, yellow pilose; metatarsus brown, black pilose. Wing: hyaline to brownish, usually all microtrichose; alula broader than cell BM appically, microtrichose.

Abdomen: terga yellow and black pilose; 1 st tergum black except yellow anteriorly and laterally2 nd tergum black with medial yellow fascia and medial yellow vitta; 3 rd to 4 th terga mostly yellow with sublateral black maculae, black medial vittae continuous posteriorly and laterally, and brownish posterior fascia; 5 th tergum yellow with sub-lateral black vittae and medial black vita ( Fig. 32). Male genitalia: surstylus all with the same width, with scattered long setae; postanal process almost 2/3 as long as surstylus; aedeagus enlarged, proeminent dorsally and with some projections ventrally; superior lobe somewhat rectangular, forked dorsally, with erect setae in distad anteroventral margin and scattered hairs, with small lobe posteroventrally.

Female. Similar to male except for the frons black, white pollinose, black pilose. Anterior anepisternum bare.

Female genitalia: 9 th tergum with two stick black macula; epiproct somewhat trapezoid; cercus slender; hypoproct somewhat triangular; 9 th sternum as in Fig. 117; three elliptical spermatecae, one of them smaller

( Figs. 116–118).

Length. Body 7.0–7.5 mm, wing 5.6–6.0 mm.

Material examined. BRAZIL. Amazonas: B. Constantino, ♀, V/1950, J. C. M. Carvalho ( MNRJ) . Mato Grosso: Sinop , ♀, III/1976, Alvarenga and Roppa ( MNRJ) . São Paulo: Praia Grande , ♂, I/1945, M. Carrera ( MZSP) ; Campos do Jordão , ♂, 31/I/1938, Trav. F. & N. Santos ( MNRJ) . Santa Catarina: Nova Teutônia , 14 ♂ & 5 ♀, V/1970, F. Plaumann ( MZSP) .

Geographical record: Widespread, from Mexico to southern South America.