Pelecinobaccha telescopica ( Curran, 1930 ) Curran, 1930

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 : 73-75

Pelecinobaccha telescopica ( Curran, 1930) comb. nov.

Map 10. Figure 39 .

Baccha telescopica Curran, 1930 — Curran, 1930: 74. Type locality: Colombia. Holotype female AMNH. Hull, 1943a: 44 (fig. 1, alula); Hull, 1949a: 205 (fig. 60, abdomen), 207 (fig. 71, abdomen), 276 (fig. 369, wing)

Ocyptamus telescopicus . Thompson et al., 1976: 28 (catalog citation).

Baccha salpa Hull, 1944 .— Hull, 1944c: 40. Type locality: Peru. Holotype male CUIC. Hull, 1949a: 169 (redescription), 224 (fig. 154, male abdomen). n. syn.

Ocyptamus salpa . Thompson et al., 1976: 26 (catalog citation).

Baccha arethusa Hull, 1949 . Hull, 1949a: 181. Type locality: Peru, Ucayali, Pucallpa . Holotype female unknown. n. syn.

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

Baccha stipa Hull, 1949 . Hull, 1949a: 110. Type locality: Colombia. Holotype female CNC. Hull, 1949a: 207 (fig. 71, female abdomen). n. syn.

Ocyptamus stipa . Thompson et al., 1976: 28 (catalog citation).

Male. Head: Shining black. Face with pale lateral 1/5 to 1/6, usually restricted to ventro-lateral ½. Lunule inconspicuously pale above antennal insertion. Frontal triangle black pilose, pair of oval spots of silvery-white pollen centro-laterally visible from dorsal view, connected to pollen from face by narrow differently oriented pollen. Vertical triangle with some dull pollen, with most black pile forming a central single row ending dorsal to anterior ocellus; ocellar triangle separated by its length from posterior eye margin. Eye contiguity slightly longer than vertical triangle length. Eye with sub-triangular indentation on posterior margin dorsal to or at level of antenna insertion. Antennal insertions confluent, antennal dark red, pedicel shorter dorsally, basoflagellomere oval short (~1.2 times as long as wide), sometimes slightly lightened baso-ventrally on the medial surface, black pilose, arista reddish black. Occiput with dull dark pollen on dorsal ⅓ and white pollen on ventral ⅔; dorsal ⅓ of occiput with 2 regular rows of simple black pile, anterior row shorter, middle with 1–2 regular anterior rows of simple long black or white pile and 1 regular posterior row of very long scale-like white pile, ventral ⅓ with 2 irregular rows of scalelike white pile.

Thorax: Prothorax black, dull pollinose. Scutum black, mostly with dull brown pollen, except white on notopleuron, and no distinct pollinose maculae; scutum with erect black pile, longer and sometimes also white laterally, anterior to transverse suture, and with anterior row of shining white pile interrupted in the middle. Scutellum black, with sparse dull brown pollen, black pilose, pile longer than on scutum, subscutellar fringe with normal black pile. Pleuron shining black, covered with white pollen, and with longer white microtrichia on anterior ½ of katatergite; pleuron white pilose, except black pile might occur on anterior anepisternum and dorsally on anterior anepimeron. Plumula normal, golden. Calypter yellow, pile sometimes darker. Halter yellow, capitulum sometimes darker basally.

Wing: Mostly dark except for apical 1/5 (dark on basal 5/6 of r1, basal ⅔ of r2+3 and basal 4/5 of dm), posterior margin sometimes also hyaline, entirely microtrichose; alula brown, basally 2 times to apically 4 times as broad as c cell, entirely microtrichose.

Legs: Proleg dark brown. Mesoleg dark brown, apex of profemur pale. Metaleg dark brown, apex to apical ¼ of metabasitarsomere to the 4th metatarsomere white, pile white dorso-laterally on metacoxa and on white regions.

Abdomen: ~3.5 times as long as scutum, dark brown. First tergite black pilose dorsally and white ventrally, with a row of white pile dorso-medially and bare medially. Second tergite long and slightly constricted medially, ~3.5 times minimum width, with subapical dull black-pollinose triangular region; 2nd tergite basal ½ with white erect pile laterally and dorsally, apical ½ with erect and black pile, except appressed dorsally. Third tergite trapezoidal and long, ~2.5 times as long as basal width, with large central triangle of dull black pollen, and with appressed black pile. Fourth tergite rectangular and long, remaining characteristics as on 3rd. Fifth tergite rectangular and wide, remaining characteristics as on 3rd. Genitalia: Epandrium not notched posteriorly. Cercus with 1 row of pile on medial margin and 2 rows on lateral margin. Surstylus long, rectangular with sub-triangular apex, directed apically, mostly with long pile on basal ½, ventrally and dorsally, with 3 rows of setulae ventroapically, very slightly concave on ventral side, without dorsal thin layer of sclerotization. Subepandrial sclerite long, slightly concave ventrally, mostly rectangular, basal margin concave and articulated with base of dorsal arc of hypandrium, apical margin with 3 small extensions. Hypandrium narrow and long, dorsal arc with long surface, base and apex very distanced from each other, with ventral notch extending to anterior ¾. Basiphallus with posterior extremity wide, distiphallus with anterior surface smooth and slightly concave, membranous region with thick microtrichia; ejaculatory apodeme long, apex convex. Phallapodeme long, mostly weakly sclerotized but strongly sclerotized at base and on a narrow central region extending towards the apex. Postgonite narrow and long, with ventral pile on basal ⅔, ventral surface gently curving dorsally at apical ⅓ until the dorsal acute extremity, dorsal surface slightly concave.

Female: Like male except: Frons with dull pollen dorso-laterally and with white pollen on maculae, vertex shiny, pile restricted to a single row, ocellar triangle ~2.5 times its length from posterior eye margin and ~1 ocelluswidth from lateral eye margin, anterior row on dorsal ⅓ of occiput sometimes very short, basoflagellomere oval long (~1.5 times as long as wide), notopleuron sometimes with a few white pile anterior to transverse suture, wing with basal ⅔ dark (dark on basal ¾ of r1, basal ½ r2+3, basal 1/5 of r4+5, basal ½ of dm), profemur paler than male, mesofemur and basal ½ of metafemur sometimes paler, abdomen slightly widening at apex of 2nd tergite and slightly narrowing at apex of 4th tergite, all pile black, short and appressed. Second abdominal tergite shorter than male, rectangular and long, 2.3 times as long as wide; 2nd tergite as long as 3rd; 4th tergite as long as 5th; 2nd and 3rd tergites longer than 4th and 5th; 3rd and 4th tergites rectangular and long. Fifth tergite slightly conical and longer than basal width, with tergite and sternite fused at apex, 1.7 times as long as wide. Sixth segment very long, 5.8 times as long as wide. Genitalia: strongly sclerotized, 7th tergite short, with a pair of lateral, weakly sclerotized, very long (as long as the 6th segment), thin, basal extensions into the 6th segment, 7th segment lateral sclerite triangular wide, dorsally extended anteriorly to the 7th tergite, with very long pair of baso-ventral extensions, very weakly sclerotized and flexible, 7th segment with central longitudinal area bare dorsally and ventrally, extensive intersegmental membranous region between 7th and 8th segments, 8th tergite with basal crest undulate on inner margin, apex rounded, 8th sternite rectangular and wide.

Length. 12–12.5mm; wing 7.5–8.5mm.

Distribution. Bolivia (La Paz), Colombia (Boyaca), Peru (Amazonas, Junín, Madre de Dios).

Material examined. BOLIVIA. La Paz, Heath River Wildlife Center, ~ 21 km SSW Puerto Heath, 12°40'S 68°42'W, 29 Apr–12 May 2007, J. H. Kits (1 ♀, DEBU 00282419). COLOMBIA. Boyaca, Muzo, 900m, Frank M. Hull Collection C.N.C. 1973, 1936, J. Bequaert (1 ♀, holotype Baccha stipa , CNC Diptera 160829). PERU. Amazonas, Montenegro, Bagua, 350m, 29 Sep–2 Oct 1963, Wygodzinsky (1 ♀, AMNH); [Junín], El Campamiento, Col. Perene, Holotype Cornell U. no 2200 [red label], Holotype salpa Hull [red label], 19 Jun 1920, Cornell Univ. Exp. (1 ♂, holotype Baccha salpa , CUIC); Madre de Dios, Manu, Rio Manu, nr. Pakitza, 250m, 12°7'S 70°57'W, 9 Sep 1988, W. N. Mathis (2 ♂, USNM ENT 0 0 257694 & ...711); ..., Pakitza, 250m, Malaise trap, 12°7'S 70°58'W, 9–23 Sep 1988, W. N. Mathis & A. Freidberg (1 ♂, USNM ENT 0 0 257702, 1 ♀, USNM ENT 00257690); ..., Rio Tambopata Reserve, 30 km SW Puerto Maldonado, 290m, 12°12'S 69°16'W, tropical- MoistFor., 19 Sep–10 Oct 1984, D. A. Grimaldi (1 ♂ & 2 ♀, AMNH).

Comments. We are unable to locate the holotype of B. arethusa , but Hull’s (1949a) description, the observations regarding a dark brown calypter and a long 6th abdominal segment, and the fact that Hull didn’t even add this species to his key, leave little doubt that it is a junior synonym of B. telescopica .

In Hull’s (1949a) key B. stipa ( Fig. 39 h) keys out as a separate species from B. telescopica , leading one to believe that Hull intended on keeping B. stipa as a separate species and not a variation from B. telescopica (as his drawings point out on fig. 71 of the same work). In couplet 78 of Hull’s (1949a) key it is noted that ‘ stipa’ is present in Colombia. Among miscellaneous material from the Frank M. Hull collection at the CNC, there was a specimen from Colombia marked as ‘ Baccha telescopica var.’ in Hull’s handwriting (CNC Diptera # 160829). There is little doubt that this specimen was the intended type for Hull’s species. The specimen was fixed as the holotype by monotypy (ICZN 73.1.2.), and labeled accordingly, to guarantee an universal interpretation of the name. The specimen agrees with the above redescription, therefore B. stipa is hereby considered a junior synonym of B. telescopica .

Figures

FIGURE 39. Pelecinobaccha telescopica (Curran, 1930). a – c. Female: a. Abdomen, apex, lateral. b – c. Genitalia: b. Dorsal. c. Lateral. d – g. Male genitalia: d. Epandrium, lateral. e. Epandrium, ventral. f. Hypandrium, oblique lateral. g. Hypandrium, ventral. h. Holotype Baccha stipa Hull, 1949 (= Pelecinobaccha telescopica), habitus, dorsal. 7 tg: 7 th tergite, 8 tg: 8 th tergite, 10 tg: 10 th tergite, cerc: cercus, s scl: subepandrial sclerite.