Toxomerus sylvaticus (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 : 55-56

Toxomerus sylvaticus (Hull)

( Figs. 2, 39, 152, 153, 154)

Mesogramma sylvatica Hull, 1943a: 34 (descr.); 1943b: 14, 40 (key & ill.).

Mesograpta sylvatica Fluke, 1956: 231 (cat.).

Toxomerus sylvaticus Thompson et al.,1976: 55 (cat. & n. comb.); Harbach, 1984: 844 (ill.).

Male. Head: face 1/2 as long as eye width, yellow, shiny except sparsely white pollinose and pilose laterally ( Fig. 2); gena black; frontal triangle yellow, black 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, black pilose, arista brown.

Thorax: postpronotum yellow; proepisternum black, bronze pollinose; proepimeron black; scutum black except broadly yellow laterally, bronze pollinose except for bluish-white pollinose medial vitta, yellow pilose; scutellum yellow, black pilose; anterior anepisternum black, long yellow pilose; posterior anepisternum black anterior 1/3, bare, and yellow posterior 2/3, 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 sometimes with brown fringe on dorsal lobe; posterior mesothoracic pleuron (katepimeron, meron, katatergum, anatergum and postscutellum) black, anatergum brownish posterodorsally; methatoracic pleuron yellow; metasternum yellow; 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, yellow pilose, mesofemur black pilose on apical 1/2; metafemur yellow except for blackish annulus on apical 1/3, yellow and black pilose; pro- and mesotibiae yellow, yellow pilose; metatibia yellow except for black annulus on basal 1/3, yellow and black pilose; pro- and mesotarsi yellow, yellow pilose; metatarsus dorsally brown, ventrally brownish, black pilose. Wing: brownish, all microtrichose; alula as broad as cell C, microtrichose.

Abdomen: terga yellow and black pilose; 1 st tergum yellow except narrowly black posteriorly; 2 nd tergum black with anterior and medial yellow fascia; 3 rd to 4 th terga yellow with sub-lateral black point, sometimes absent on 3 rd tergum, and with sinuous black medial vittae continuous posteriorly and laterally, and brownish posterior fascia; 5 th tergum yellow with sub-lateral black vittae, sometimes interrupted and medial black vitta arrow-like ( Fig. 39). Male genitalia: surstylus broader apically and concave ventrally in lateral view, with scattered short setae; postanal process 2/3 as long as surstylus; aedeagus enlarged, proeminent dorsally and ventrally; superior lobe somewhat trapezoid with short dorsal extension, forked distad, with scattered hairs,

with small lobe dorsally with hairs.

Female. Similar to male except for the frons black, bronze pollinose, black pilose. Anterior anepisternum with a few short piles. Female genitalia: 9 th tergum with a semicircle black macula little concave posteriorly; epiproct slender; cercus slender; hypoproct somewhat triangular; 9 th sternum as in Fig. 153; three biconvex spermatecae similar in size ( Figs. 152–154).

Length. Body 7.0–8.0 mm, wing 7.0–8.0 mm.

Type material examined. Allotype. ECUADOR. Sucua : Rio Upano, Mesograpta sylvatica , female, 31/1/ 1939, F. M. & H. Brown ( AMNH).

Other material examined. COLOMBIA. Piedra Ancha : ♀, 5/IV/1966, E. Velastegui ( USNM) . ECUADOR. Banos : ♂, 5/VII/1938, W. C. Macintyre ( USNM) ; 3♂, 2 ♀, 28/VII/1963, 20/VIII/1963 ,, 21/ VIII/1963, ♂, 23/II/1965, 29/XII/1966, Velastegui ( USNM) . Obitahua: Cerro , 2 ♂, f, 3/IV/1967, 4/IV/1967, Velastegui ( USNM) ; Oriente , ♂, 19/VIII/1966, Velastegui ( USNM) . BRAZIL. Rio de Janeiro: Petrópolis , ♂, 15/I/1973, H. S. Lopes ( MNRJ) ; Teresopolis , ♀, 21/I/1940, Freitas & Lopes ( CNC) . São Paulo: Rio Claro , ♂, 14/I/1977, L. Knutson ( USNM) . S. Jose dos Campos , ♀, VII/1933, H. S. Lopes ( CNC) . Cantareira , ♀, VIII/ 1945, J. Lane ( CNC) ; ♂, X/1945, Barreto ( CNC) ; ♀, X/1945, M. Carrera ( MZSP) ; Fazenda Pau D’Alho , 2 ♂ & ♀, 28–29/X/1972, B. V. Peterson ( CNC) ; Barueri , ♂, 03/IV/1955, K. Lenko ( MZSP) ; ♂, 04/X/1955, K. Lenko ( MZSP) .

Geographical record. Tropical South America.