Pelecinobaccha clarapex ( Wiedemann, 1830 ) Wiedemann, 1830

Miranda, Gil Felipe Gonçalves, Marshall, Stephen A. & Skevington, Jeffrey H., 2014, Revision of the genus Pelecinobaccha Shannon, description of Relictanum gen. nov., and redescription of Atylobaccha flukiella (Curran, 1941) (Diptera: Syrphidae), Zootaxa 3819 (1), pp. 1-154 : 31-33

Pelecinobaccha clarapex ( Wiedemann, 1830) comb. nov.

Map 13. Figure 22 .

Syrphus clarapex Wiedemann, 1830 .— Wiedemann, 1830: 684. Type locality: Brazil. Holotype female NHMW. Baccha colombiana Curran, 1941 .— Curran, 1941: 282. Type locality: Colombia, Magdalena. Holotype male AMNH. Hull, 1949a: 215 (fig.109, abdomen), 271 (fig. 346, wing). n. syn.

Ocyptamus colombianus . Thompson et al., 1976: 14 (catalog citation).

Male. Head: Black. Face pale on lateral ¼. Lunule usually pale above antennal insertions, central macula separated from or narrowly touching the frontal triangle color. Frontal triangle sometimes pale laterally but not greatly extended, with white pollen restricted to lateral narrow oval spots, connected to face pollen by very narrow vittae of differently oriented pollen. Vertical triangle with a single median row of pile; ocellar triangle ~2 times its length from posterior eye margin. Eye contiguity as long as vertical triangle length. Eye with sub-triangular indentation positioned at level of antenna insertion. Antennal insertions confluent, ventral margin with short dorsal extension. Antenna dark brown. Dorsal ¼ of occiput with 2 rows of simple black pile, anterior row with very short pile; middle ½ with 2–3 rows of scale-like white pile, anterior rows shorter, sometimes a few pile are simple and black; ventral ¼ with 2–3 rows of white, scale-like pile, anterior rows slightly shorter.

Thorax: Scutum black, mainly dull pollinose with pair of sub-median white pollinose vittae, tapering posteriorly, and a median weaker postero-anterior vitta; scutum mainly black pilose, except white on notopleuron, pile slightly longer on notopleuron and longer anterior to scutellum; scutum anterior row of shining white pile with shorter pile in the middle. Scutellum black, with golden pile, subscutellar fringe pile long and white. Pleuron black, pale on posterior ½ of the posterior anepisternum and dorso-posterior portion of katepisternum; pleuron mostly white pilose, except pile golden on dorso-posterior ½ of posterior anepisternum and anterior anepimeron. Plumula golden and normal. Calypter yellow to greyish, middle pile of ventral lobe have brownish apical ½. Halter yellow, capitulum sometimes orange.

Wing: Mainly dark brown, light brown on apex of r2+3, apical ½ of r4+5, apical ½ of dm, apex of cua1 and anal lobe, entirely microtrichose; alula basally 1.25 times and apically 3.8 times as broad as c cell, light brown, entirely microtrichose.

Legs: Proleg dark brown, apical ½ of profemur sometimes slightly lighter, basal ½ of protibia light brown. Mesoleg dark brown, apex of mesofemur pale, basal ⅔ of mesotibia pale. Metaleg dark brown, pale on apex of metafemur and apical ⅓ of metabasitarsomere to 4th metatarsomere, 5th metatarsomere slightly dark.

Abdomen: Dark brown; 3.6 times as long as thorax. First tergite with erect white pile. Second tergite long, length 5 times minimum width, and sometimes with pale baso-lateral ⅔; 2nd tergite with subapical central triangular region of dull black pollen, and mostly black pilose, except white on basal ⅔, pile appressed dorsally, long and erect laterally. Third tergite trapezoidal and long, length ~3.3 times minimum width, with baso-lateral ½ to ⅔ of the tergite pale and with pair of short vittate central maculae; 3rd tergite with large central triangular region of dull black pollen, and with short, appressed and black pile, pile slightly longer and pale baso-laterally. Fourth tergite rectangular and wide, with baso-lateral pale triangles that don’t connect to central vittate maculae, and with dull black pollen absent only on base and apex; remaining characteristics as on 3rd. Fifth tergite rectangular and wide; remaining characteristics as on 4th. Genitalia: Cercus with 1 regular row of pile on medial margin and 2 irregular rows on lateral margin. Surstylus directed apicoventrally, with setulae (around 12) on ventral apex, stronger apically, very few pile on basal ½ of the dorsal surface. Subepandrial sclerite short and trapezoidal, with a pair of lateral extensions articulated to base of the surstyli. Hypandrium with ventral notch extending to anterior ½ and with a rounded posterior margin. Phallapodeme well sclerotized throughout, enlarging basally. Distiphallus smooth and anterior surface slightly curved anteriorly on apex. Postgonite with a few short pile on ventral surface, ventral surface slightly concave, lateral surface slightly expanded ventrally, dorsal surface slightly concave basally but otherwise straight and directed dorsally; postgonite apex convex anteriorly, with convex ventral extremity and acute dorsal extremity.

Female: Similar to male except: Ocellar triangle ~2 times its length from posterior eye margin and 1–1.5 ocelli-width from lateral eye margin. Wing with basal ½ dark (dark on cells bc, c, sc, basal ½ of r1, basal ⅓ r2+3, base of r4+5, basal ½ to ⅓ of dm, cu p, basal ½ of cua1 and most of the anal lobe), otherwise hyaline. Protibia sometimes with basal ½ light brown to yellow. Metabasitarsomere with slightly less than apical ½ to apical ⅓ white. Second abdominal tergite shorter, length 3.3 times minimum width, and with much shorter pile. Third abdominal tergite shorter, length 2 times minimum width. Sixth segment conical normal, slightly shorter than its smallest width and as long as the 5th. Genitalia: 7th tergite normal, as wide as median length, apex triangular or straight; 7th segment lateral sclerite normal, with acute basal extremities and blunt apical extremities. Eighth tergite with central region well sclerotized, apex 2-pronged, basal crest short, anterior margin to basal crest smooth.

Length. 8.5–10mm; wing 7–8mm.

Distribution. Bolivia (Beni), Brazil (Goiás, Mato Grosso, São Paulo), Colombia (Boyaca, Magdalena), Costa Rica (Puntarenas, San José), Ecuador (Pichincha), Guatemala (Suchitepéquez), Peru (Madre de Dios), Venezuela (Zulia).

Material examined. BOLIVIA. Beni, Huachi, Mulford Bio Expl, 1921–22, Wm M. Mann (1 ♀, CNC Diptera 161132). BRAZIL. “ Brasilia ”, clarapex Wiedemann, Winthem (1 ♀, holotype Syrphus clarapex , NHMW); Bahia, Una, ESMAI, 25.II.2000 (1 ♀, MZUSP); Goiás, Corumbá [de Goiás], Faz. Monjolinho, Nov 1945, [M.P.] Barretto (1 ♀, MZUSP); Mato Grosso, Três Lagoas, Faz. Floresta, 13–20 Sep 1964, Exp. Dept. Zool. (1 ♀, MZUSP); São Paulo, Araçatuba, Faz. Jacarecatinga, 10–15 Jun 1963, Rabello (1 ♂, MZUSP); ..., Cidade Azul, Feb 1946, M.P. Barretto (1 ♂ & 1 ♀, MZUSP); ..., Barueri, 13 Apr 1957, K. Lenko (1 ♀, MZUSP); …, Cajuru, Cássia dos Coqueiros, Oct 1954 & Feb 1955, M.P. Barretto (2 ♀, MZUSP); …, Castilho, marg. esq. r. Paraná, 19 Oct 1964, Exp. Depo. Zool. (1 ♀, MZUSP); …, H. Florestal, Mar 1952, M. Carrera & M.A. d’Andretta (1 ♀, MZUSP). COLOMBIA. Boyaca, Muzo, 900m, Frank M. Hull Collection C.N.C. 1973, 1936, J. Bequaert (2 ♀, CNC Diptera 161128, 161131); Magdalena, Cerro Patron, Rio Frio, 4000ft, C.H.Curran Collection Acc. 31144, Baccha colombiana Curran Holotype [red label], 12 Sep 1927, G. Sals (1 ♂, holotype Baccha colombiana , AMNH). COSTA RICA. Puntarenas, Centro Peninsular Karen Mongense, 300m, L_N_206090_421100, #49708, 23 Nov 1997, F. Alvarado (1 ♂, INBIO CRI 002 412021); ..., R. Priv. Karen Mogensen, Send. El Viejo Nispero, 300–500m, Libre, L_N_205600_420300, #74548, 8 Jul 2003, D. Briceño (1 ♂, INB0003739669 INBIOCRI COSTA RICA); ..., red. con aguamiel, L_N_205300_419750, #75451 & #75452, 23 & 25 Sep 2003, Y. Cardenas (3 ♀, INB0003768190,...8208 &...8268 INBIOCRI COSTA RICA); ..., 315m, L_N_205600_420300, #74547, 3 Jul 2003, Y. Cardenas (1 ♂, INB0003739531 INBIOCRI COSTA RICA); San José, Alto Tigre, 750m, L_N_ 210700 _504000, #46355, 15 May 1997, F. A. Quesada (1 ♂, INBIO CRI 002 563999); ..., #48052, 15 May 1997, M. A. Zumbado (2 ♂, INBIO CRI 002 578404–5). GUATEMALA. Such[itepéquez], Variedades, 500ft., 30 Aug 1947 (1 ♀, AMNH). ECUADOR. Pich[incha]. Pr., 47 km S Sto. Domingo, Rio Palenque Station, 250m, 17–25 Feb 1979, S. A. Marshall (1 ♂, DEBU). PERU. Madre de Dios, Avispas , 400m., 20–30 Sep 1962, L. Pena (2 ♀, CNC Diptera 161129 –30). VENEZUELA. Zulia, El Tucuco (45 km SW of Machiques), 5–6 Jun 1976, A. S. Menke & D. Vincent (1 ♂, USNM ENT 0 0 257691, 1 ♀, USNM ENT 00257660).

Comment. One female specimen from Bolivia (CNC Diptera 161132) is in poor condition, with no abdominal markings visible and the genitalia apex mostly washed out in the clearing process. The specimen is also slightly larger (length 12mm and wing length 10mm), the tibiae are darker and the 2nd abdominal tergite length is 4 times its minimum width.

Figures

FIGURE 22. Pelecinobaccha clarapex (Wiedemann, 1830). a – d. Female genitalia: a. 7 th tergite, dorsal. b. Apex, dorsal. c. 7 th segment, lateral. d. Apex, lateral. e – h. Male genitalia: e. Epandrium, lateral. f. Epandrium, ventral. g. Hypandrium, lateral. h. Hypandrium, ventral. i. Female, habitus, dorsal. 8 tg: 8 th tergite, 10 tg: 10 th tergite, cerc: cercus, s scl: subepandrial sclerite.