Toxomerus polygraphicus (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 : 48-49

Toxomerus polygraphicus (Hull)

( Figs. 36, 68, 69, 70, 134, 135, 136)

Mesogramma polygraphica Hull, 1940a: 249 (descr.); 1943b: 10, 30 (key & ill.).

Mesograptapolygraphica Fluke, 1956: 228 (cat.).

Toxomerus polygraphicus Thompson et al., 1976: 54 (cat. & n. comb.).

Male. Head: face 1/3 as long as eye width, yellow, shiny except sparsely white pollinose and pilose laterally; 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 to brownish, 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 or brownish with yellow margins, yellow and black pilose; anterior anepisternum black, sparsely 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 brownish to black; 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, yellow pilose; metafemur yellow except for black annulus on apical 1/3, yellow and black pilose; pro- and mesotibiae yellow, yellow pilose; metatibia yellow, slightly brownish on basal 1/2, yellow pilose; pro- and mesotarsi yellow to brownish, yellow pilose; metatarsus brown black, black pilose. Wing: hyaline, extensively microtrichose, bare only: on basal 1/2 or less of cell C, basal 1/5 of cell R1, basal 2/3 or less of cell R and basal 3/4 or less of cell BM; alula broader than cell BM appically, microtrichose.

Abdomen: terga yellow and black pilose; 1 st tergum black except yellow anteriorly and laterally; 2 nd tergum black with medial yellow fascia interrupt medially, sometimes with brownish-orange fascia anteriorly and posteriorly; 3 rd to 4 th terga black with a lateral trapezoid yellow vittae on anterior 1/3, two sub-lateral yellow macullae and medial yellow vitta extending to posterior margin; 5 th tergum black with arcuate lateral yellow vittae and medial yellow maculae ( Fig. 36). Male genitalia: surstylus slightly pointed at apex, with scattered short setae, some long on dorsal surface; postanal process 1/2 as long as surstylus; aedeagus proeminent dorsally and with some projections ventrally; superior lobe somewhat rounded ventrally with short dorsal extension, slightly forked distad, with setae along ventral margin, with small lobe posteriorly with hairs ( Figs. 68–70).

Female. Similar to male except for the frons black, bronze pollinose, yellow pilose. Anterior anepisternum with rare short piles.

Female genitalia: 9 th tergum with two stick black macula; epiproct somewhat semielliptical; cercus slender; hypoproct somewhat triangular; 9 th sternum as in Fig. 135; three oval spermatecae similar in size ( Figs. 134–136).

Length. Body 7.5–8.5 mm, wing 6.5–7.5 mm.

Type material examined. Holotype. BRAZIL. São Paulo: Batea, Mesogramma polygraphica , female, IX–37, J. Lane ( CNC).

Other material examined. BRAZIL. Paraná: Curitiba , ♂, 12/II/1976, H. S. Telford ( UFPR) ; ♂, IV/ 1976, H. S. Telford ( UFPR) ; Santa Catarina: Nova Teutônia , ♂, 5 ♀, 6/VII/1936, 15/III/1937, 30/III/1960, 1/ IV/1960, I/1970, F. Plaumann ( CNC) ; 9 ♂ & 6 ♀, V/1970, XI/1970, F. Plaumann ( MZSP) .

Geographical record. Peru to southern Brazil.