Pelecinobaccha hiantha (Hull, 1943) Hull, 1943

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 : 44-46

Pelecinobaccha hiantha (Hull, 1943) comb. nov.

Map 9. Figure 29 .

Baccha hiantha Hull, 1943 — Hull, 1943a: 74. Type locality: Brazil, Santa Catarina, Nova Teutônia. Holotype female AMNH. Hull, 1949a: 154 (redescription), 212 (fig. 96, female abdomen), 272 (fig. 356, female wing).

Ocyptamus hiantha . Thompson et al., 1976: 19 (catalog citation).

Female allotype of Baccha zerene Hull, 1949 — Hull, 1949b: 245. Type locality: Peru, Chanchamayo. Allotype female CNC. n. syn.

Baccha zoe Hull. Nomen nudum (collection name).

Male. As in P. manuelorum except: Head: Face pale on lateral ¼, mainly white pilose except black ventral to antennal insertions. Lunule usually distinctly pale, central black macula connected by dark vitta to frontal triangle color. Vertical triangle with black pile concentrated on a medial row; ocellar triangle ~1.5 times its length from posterior eye margin. Antennal insertions confluent, ventral margin with dorsal extension. Dorsal ¼ of occiput with 2 rows of simple black pilosity, pile of anterior row very short; middle ½ with 3 rows of scale-like white pile, anterior rows shorter and with simple black pile dorsally; ventral ¼ with 2–3 regular rows of scale-like white pile. Thorax: Scutum mostly brown dull pollinose, pollen more concentrated on notopleuron, with inconspicuous submedian short pair of vittae of concentrated pale pollen; scutum with erect black pile, longer on notopleuron anterior to transverse suture and anterior to scutellum, and with anterior row of shining white pile interrupted medially. Anterior anepimeron usually white pilose, dorso-posterior of posterior anepisternum has only a few black pile dorsally, rarely with posterior anepisternum, anterior anepimeron and katepisternum black pilose. Plumula normal. Halter capitulum yellow. Wing: Mostly dark with posterior margin diffuse light brown (dark on cells bc, c, sc, r, r1, r2+3 and bm, other cells diffusely light brown); alula diffusely light brown with anterior margin darker. Legs: Proleg dark brown, only apex of profemur and base of protibia pale. Mesoleg dark brown, basal ¼ of mesotibia light brown. Metaleg dark brown, pale on apical ¼ of the metabasitarsomere and other metatarsomeres, apical tarsomere sometimes light brown. Abdomen: ~4 times as long as thorax. Second tergite usually pale on baso-lateral ½, length ~3 times minimum width, and with white pile baso-laterally; 2nd sternite with sparse short black pile or bare. Third tergite pale baso-laterally. Fourth tergite rectangular and long. Genitalia: Cercus with 1 regular rows of pile on medial margin, and 2 regular rows of pile on lateral margin, densely microtrichose. Surstylus directed ventrally, ventral surface with around 12 setulae on apex and around 5 setulae sparsely distributed medially until the base, dorso-apical ¾ pilose. Subepandrial sclerite trapezoidal, slightly convex on posterior margin. Hypandrium with ventral notch straight and extending to anterior ½. Phallapodeme very weakly sclerotized on basal ⅓. Basiphallus with posterior extension long; distiphallus apical margin strongly curved anteriorly. Postgonite with dense long pile ventrally except on ventro-apical 1/5, ventral surface straight, dorsal surface ascending dorsally on apical ⅔, apex concave, ventral and dorsal apices acute.

Female: Like male except: Face distinctly pale on lateral ⅓. Ocellar triangle 2.5–3 times its length from posterior eye margin and ~1 ocellus-width from lateral eye margin. Ventral margin dorsal extension between the antennal insertions sometimes distinctly sclerotized half way to dorsal margin. Sometimes posterior anepisternum entirely white pilose. Wing with dark regions well delimited and remainder of wing hyaline (dark on cells bc, c, sc, r, r1, r2+3 except for a medial region on posterior margin, basal ⅓ of r4+5, bm, basal ⅔ of dm, most of cua1 and cu p; anal lobe light brown). Legs entirely dark brown but sometimes profemur and protibia mostly light brown. Second to 4th protarsomeres and 3rd and 4th mesotarsomeres slightly swollen. Mesofemur and basal ¾ of mesotibia light brown and basal ½ of metafemur light brown. Metabasitarsomere pale on apical ⅓ or ¼; metacoxa sometimes mainly black pilose. Second abdominal tergite shorter, length 2.5–3 times minimum width, and with triangular region of dull black pollen. Third abdominal tergite shorter, length ~1.6 times minimum width, with baso-lateral pale triangles. Fourth and 5th abdominal tergites rectangular and wide, remaining characteristics as on 3rd. Sixth segment conical, 1.3 times as long as 5th tergite. Genitalia: 7th tergite rectangular, wide and short, apex convex and slightly extended, basal extensions slightly shorter than 6th segment; 7th segment lateral sclerite right triangle shaped. Eighth tergite unsclerotized medially appearing as reduced to a pair of narrow separate sclerites, basal crest short. Tenth tergite reduced to a pair of sclerites, fused to the dorsal surface of the cerci. Cercus with 1 row of marginal pile.

Length. 11–13mm; wing 9–10mm.

Distribution. Brazil (Goiás, Santa Catarina), Colombia (Boyaca), Costa Rica (Guanacaste, Puntarenas), Peru (Junín).

Material examined. BRAZIL. Goias, Campinas, 8 Jan 1934, T. Borbmeier (1 ♂, CNC Diptera 160776); Paraná, Rondon, 24°38'S 54°07'W, Mar 1956, F. Plaumann (1 ♂, CNC Diptera 161225); Santa Catarina, Nova Teutônia, 27°11'S 52°23'W, Holotype hiantha [red label], 10 Nov 1936, F. Plaumann (1 ♀, Holotype Baccha hiantha , AMNH). COLOMBIA. Boyaca, Muzo, 900m, Frank M. Hull Collection C.N.C. 1973, 1936, J. Bequaert (1 ♀, CNC Diptera 160778). COSTA RICA. Guanacaste, Nandayure, Cerro Azul, 1050m, libre, L N 214769 39700, #77663, 13–16 Apr 2004, W. Porras (1 ♂, INB0003860405 INBIOCRI COSTA RICA); ..., Santa Rosa Nat. Park, on Piper marginatum , #79-11358, 8 Aug 1979, A. Perry (1 ♀, USNM ENT 00257650); Puntarenas, Camino a las Tablas, horilla de un charral, 1200m, L_S_318300_594400, #50799, 28 Jun 1998, E. Navarro (1 ♂, INB0003045917 INBIOCRI COSTA RICA); ..., Fca. Cafrosa, Tajo, 1 km O del Tajo, 1500m, L_S_319350_596470, #47403, 11 Jul 1997, A. Picado (1 ♀, INBIO CRI 002 567582); ..., Send. al Higueron Central, 2.5 km NE del Progresso, 1450m, L_S_318900_597300, #48066, 3 Oct 1997, A. Picado (1 ♂, INBIO CRI 002 576075); ..., Send. a las Juntas, 2.5 km N. de Progresso, 1500m., L_S_320800_594500, #48875, 0 5 Nov 1997, E. Navarro (1 ♂, INBIO CRI 002 409156). PERU. Junín, Chanchamayo, 1100m, Allotype Baccha zerene Hull [red label], 17 Jul ??48, J. Schunke (1 ♀, allotype Baccha zerene , CNC Diptera 203490); …, Holotype Baccha zoe Hull [red label], 16 Aug [19]48, J. Schunke (1 ♂, CNC Diptera 189152).

Comments. The dark regions on the wing are sometimes reduced on teneral specimens.

A single specimen from Chanchamayo ( Peru, Junín) collected by J. Schunke, from Hull’s personal collection and now in the CNC, has a red label written with “ Holotype Baccha zoe Hull ”, apparently a manuscript name.

Very close to P. manuelorum from which it can be distinguished by the anterior row of pile on the dorsal occiput, the pilosity on the 2nd abdominal sternite and genitalic characters.

Figures

FIGURE 29. Pelecinobaccha hiantha (Hull, 1943). a – b. Female genitalia: a. Dorsal. b. Lateral. c – f. Male genitalia: c. Epandrium, lateral. d. Epandrium, ventral. e. Hypandrium, lateral. f. Hypandrium, ventral. g. Holotype, habitus, dorsal. 7 tg: 7 th tergite, 8 tg: 8 th tergite, 10 tg: 10 th tergite, cerc: cercus, s scl: subepandrial sclerite.