Pelecinobaccha brevipennis ( Schiner, 1868 ) Schiner, 1868

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 : 29-30

Pelecinobaccha brevipennis ( Schiner, 1868) comb. nov.

Map 4. Figure 4 .

Baccha brevipennis Schiner, 1868 .— Schiner, 1868: 341. Type locality: “South America ”. Types male and female NHMW (not examined). Hull, 1949a: 204 (fig. 64, male abdomen), 268 (fig. 343, male wing).

Ocyptamus brevipennis . Thompson et al., 1976: 13 (catalog citation).

Baccha micropelecina Shannon, 1927 .— Shannon, 1927: 10. Type locality: Bolivia, Tumupasa. Holotype female USNM. Hull, 1949a: 250 (fig. 269, female abdomen). n. syn.

Ocyptamus micropelecinus . Thompson et al., 1976: 22 (catalog citation).

Male. Head: Black. Lunule entirely black and very rugose until middle of frontal triangle. Frontal triangle bare on rugose area, dull black-pollinose dorso-medially, white pollen restricted to small ventro-lateral spots. Vertical triangle with 1 row of short black pile; ocellar triangle ~1.5 times its length from posterior eye margin. Eye contiguity shorter than vertical triangle length. Eye with posterior indentation ventral to the antennal insertion. Antennal insertions confluent, ventral margin has a short dorsal extension. Occiput homogenously covered by white pollen; dorsal ¼ of occiput with 2 rows of simple black pile, anterior row intermittent and with very short pile, middle 2⁄4 with 2–3 rows, anterior rows sometimes with simple black pile, posterior row with long, white, scale-like pile, ventral ¼ with 2–3 rows of white, scale-like pile, anterior row shorter.

Thorax: Scutum black with anterior pair of patches of dull brown pollen; pile mostly very short and black, longer and white laterally posterior to transverse suture and with an anterior row of short shining white pile interrupted at middle. Scutellum dark brown with very short black pile, subscutellar fringe absent. Pleuron black with short appressed white pile, pile of metepisternum inconspicuous. Plumula absent. Calypter white, ventral lobe narrow, dorsal lobe bare. Halter white to yellow.

Wing: Entirely hyaline, entirely microtrichose; alula linear, slightly narrower than c cell, hyaline, entirely microtrichose.

Legs: Proleg pale, light brown on basal ¼ and posterior surface of profemur and small subapical region on protibia, protarsus dark brown. Mesoleg dark brown, apex of mesofemur and basal 2/5 of mesotibia pale, mostly white pilose on apex of mesofemur and basal ¼ of mesotibia, mesofemur posterior row mostly white pilose. Metaleg dark brown, apex of metafemur and basal ¼ of metatibia pale, pile on metacoxa and metatrochanters white.

Abdomen: Dark brown; ~5 times as long as thorax, whole abdomen with very short black pile. First tergite pale laterally. Second tergite bare dorsally, very long and narrow, length ~7 times minimum width, and with lateral pair of pale fasciate maculae subapically; dull black pollen forming a subapical fascia connected to an incomplete postero-median narrow vitta. Third tergite very long and narrow, length ~7 times minimum width, and with lateral pair of fasciate pale maculae medially, maculae may extend posteriorly; median vitta of dull black pollen slightly expanding posteriorly; remaining characteristics as on 2nd. Fourth tergite entirely pilose, trapezoidal and long, length ~5 times minimum width, with lateral sub-basal pair of pale triangular maculae. Fifth tergite sub-quadrate, immaculate, entirely pilose. Genitalia: Cercus with 1 row of pile on medial margin and 3 rows on lateral margin. Surstylus very short and oval, directed apically, with many setulae (around 35) ventrally but thicker and concentrated on anterior margin and a few of the basal setulae are distinctly longer, with a few pile on the dorsal surface. Subepandrial sclerite quadrate with slightly concave posterior margin, homogenously sclerotized. Hypandrium short and rectangular, with ventral rectangular notch on anterior ½. Phallapodeme ½ the length of the hypandrium, homogenously sclerotized, with sub-acute base. Distiphallus with anterior surface straight. Postgonite short, ventral surface straight, dorsal surface slightly concave, apex strongly convex, with acute ventral and dorsal extremities.

Female: Like male except: Frons of normal width, rugose on ventral ⅓; colour black with dull brown pollinosity medially, a dull black-pollinose spot dorsal to frontal prominence, and lateral white pollinosity continuous from face pollinosity. Ocellar triangle ~2 times its length from posterior eye margin and ~2 ocelli-width from lateral eye margin. Scutum with white pollen laterally and forming a pair of sub-median antero-posterior vittae and a median postero-anterior one; lateral pale pile shorter posterior to transverse suture. Legs mostly pale but dark brown subapically on mesofemur, on apical ½ of metafemur, apical ⅔ of metatibia and all tarsi; posterior row of mesofemur with short pile basally. Whole abdomen with very short black pile. Second tergite very long, length ~5.5 times minimum width, with pair of median lateral fasciate pale spots; medial vitta of dull black pollen not expanded posteriorly. Third tergite long, length ~4 times minimum width, pale on sub-median lateral margin. Fourth tergite long, ~2.5 times as long as wide, usually immaculate, sometimes with pair of median pale vitta on basal ½. Fifth tergite rectangular and long, ~1.5 times as long as wide, 5th segment sclerites fused laterally on apical ½, immaculate. Sixth segment whole, very short, ~⅓ of the length of the 5th tergite. Genitalia: Seventh tergite rectangular narrow, with very short anterior notch medially, basal extensions ½ the length of the 6th segment; 7th segment lateral sclerite rectangular, without acute baso-ventral extremities, joining 7th tergite by narrow sclerotized strip on dorso-posterior corner. Eighth tergite unsclerotized medially but with a subapical narrow well sclerotized strip extending baso-medially as an acute projection, basal crest extended posteriorly. Eighth sternite reduced to a pair of separate triangular sclerites, each with sub-basal unsclerotized areas. Tenth tergite reduced to a transverse sclerotized stripe, extending ventro-basally on each side and fusing to basal surface of cercus. Cercus with apical margin concave and with 2 irregular rows of pile.

Length. 9–11mm; wing 5.5–6.5mm.

Distribution. Brazil ( Pará ), Ecuador (Napo), Peru (Cuzco, Madre de Dios, Ucayali), Venezuela (Amazonas).

Material examined. BRAZIL. Pará , Serra Norte, Pojuca, 0 1 Jul 1985, M.F. Torres (1 ♂, MPEG-DIP 12170471); ..., Salobo, 26 Jun 1984, T. Pimental (1 ♂, MPEG-DIP 12170496). ECUADOR. Napo, Coca, Napo R., 250m, 25–30 Apr 1965, L. Pena (1 ♂, CNC Diptera 161328). PERU. Cuzco, Pilcopata, 13 Feb 1978, P.M. Marsh (1 ♂, USNM); Madre de Dios, Avispas , 400m., 10–20 Sep 1962, L. Pena (3 ♂, CNC Diptera 161329–31, 2 ♀, CNC Diptera 161332–3); ..., Manu, Rio Manu, Pakitza, Malaise trap, 250m, 12°7'S 70°58'W, 9–23 Sep 1988, W.N. Mathis (1 ♂ & 1 ♀, USNM); [Ucayali], Pucallpa , 18 Nov 1947, J. Shunke (1 ♂, CNC Diptera 161327); ..., Unini, 22 Oct [19]03 (1 ♂, CNC Diptera 161323). VENEZUELA. [Amazonas], T. F. Amaz., Cerro de la Neblina, Basecamp, 140m, 0°50'N 66°9'44''W, 13–20 Feb 1984, D. Davies & T. McCabe (1 ♀, USNM).

Figures

FIGURE 4. Pelecinobaccha brevipennis (Schiner, 1868). 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. Surstylus, ventral. f. Subepandrial sclerite, dorsal. g. Hypandrium, lateral. h. Hypandrium, ventral. i. Male, habitus, dorsal. 8 tg: 8 th tergite, 10 tg: 10 th tergite, cerc: cercus.