Toxomerus elisa (Hull)

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 : 33-34

Toxomerus elisa (Hull)

( Figs. 27, 44, 45, 46, 95, 96, 97)

Mesogramma elisa Hull, 1951a: 5 (descr.).

Mesograpta elisa Fluke, 1956: 222 (cat.).

Toxomerus elisa Thompson et al., 1976: 50 (cat. &n. comb.).

Male. Head: face 1/2 as long as eye width, yellow, shiny except sparsely white pollinose and pilose laterally; gena black; frontal triangle yellow with a little brown macula next to lunule, 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 to brownish, black 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 usually yellow, sometimes brown with yellow margins, black pilose; anterior anepisternum black, long yellow pilose; posterior anepisternum black anterior 1/2, yellow pilose dorsally, posterior ½ yellow, yellow pilose; katepisternum black except dorsal 1/3 yellow, dull, yellow pilose; anterior and dorsomedial anepimeron yellow; posterior anepimeron black; plumula yellow, calypter yellowish with yellowish fringe except brown fringe on dorsal lobe; posterior mesothoracic pleuron (katepimeron, meron, katatergum, anatergum and postscutellum) black, anatergum yellow posterodorsally; methatoracic pleuron yellow; 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, profemur yellow pilose, except black pilose on apical 1/3, mesofemur black pilose; metafemur usually yellow, sometimes with indistinct black annulus on apical 1/3, black pilose; tibiae yellow, protibia yellow and black pilose; meso- and metatibia black pilose; pro- and mesotarsi yellow, yellow and black pilose; metatarsus brown, black pilose. Wing: hyaline to brownish, all microtrichose; alula as broad as cell BM appically, microtrichose.

Abdomen: terga yellow and black pilose1 st tergum black except yellow anteriorly and laterally; 2 nd tergum black with medial yellow fascia interrupt medially and yellow latero-anteriorly; 3 rd to 4 th terga black with yellow fascia on anterior 1/3 not touching sub-lateral and medial base and interrupt in the middle for a yellow medial vitta; 5 th tergum black with yellow fascia on anterior 1/2 interrupt medially ( Fig. 27). Male genitalia: surstylus flattened apically, with scattered short setae; postanal process 1/2 as long as surstylus; aedeagus enlarged, proeminent dorsally; superior lobe somewhat rounded ventrally with very long dorsal extension, forked distad, with scattered hairs, with small lobe medio-dorsal with hairs ( Figs. 44–46).

Female. Similar to male except for the frons black, bronze pollinose and black pilose.

Female genitalia: 9 th tergum with an extended “V” shape black macula; epiproct rounded; cercus broad; hypoproct somewhat triangular; 9 th sternum as in Fig. 96; three biconvex spermatecae similar in size ( Figs 95–97).

Length. Body 5.5–7.0 mm, wing 4.5–5.5 mm.

Type material examined. Holotype. BRAZIL. São Paulo: Mesogramma elisa , ♂, XI/1934, Hamilton ( AMNH).

Other material examined. BRAZIL. Minas Gerais: Ouro Preto , ♀, VIII/1969, F. C. do Val ( MZSP) . Rio de Janeiro: Petropolis , ♀, XI/1929 ( CNC) ; ♀, 24/I–23/II/1953, D. Albuquerque ( MNRJ) ; ♂, 11/VI/1972, H. S. Lopes ( MNRJ) ; Itatiaia , ♀, 26/IX/1954, D. Albuquerque & Barros ( MNRJ) . São Paulo: Bocaina , 5 ♂ & 7 ♀, V/1951, Dalcy & Machado ( MNRJ) ; ♂ & ♀, XI/1970, M. Alvarenga ( MNRJ) . Paraná: Curitiba , 11♂ ,

10♀, 17/XI/1975, 30/XI/1975, 26/XII/1975, 30/XII/1975, 6/I/1976, 8/I/1976, 11/I/1976, 3/II/1976, 4/II/1976, 9/II/1976, 10/II/1976, 12/II/1976, 14/II/1976, 19/II/1976, 26/II/1976, 2/III/1976, 4/III/1976, H. S. Telford ( DZUP).

Geographical record. Southeastern Brazil.