Scelolabes Philippi, 1865

Barros, Luana Machado, Freitas-Silva, Rafael Augusto Pinheiro de & Ale-Rocha, Rosaly, 2023, Revision of Neotropical Scelolabes Philippi (Diptera, Hybotidae, Ocydromiinae): two new species and a proposal of delimitation, European Journal of Taxonomy 890 (1), pp. 49-70 : 66

Identification key for Neotropical species of Scelolabes Philippi, 1865

1. Scutum with narrow black stripe restricted to intra-alar region ( Fig. 3F ); legs (males) covered by long, slender, and waved setae; hind femur with 2 rows of spine-like setae on ventral surface ( Fig. 3A ); left surstylus with long setae, as long as half-length of left surstylus ( Fig. 4E ) ................ .................................................................................................... Scelolabes bivittatus Philippi, 1865

– Scutum widely darkened, black stripe covering at least intra-alar and dorsocentral regions ( Figs 1F , 5D ); legs (males and females) covered by short and slender setae; hind femur without rows of spine-like setae on ventral surface, only long and strong ordinary setae ( Fig. 1A ); left surstylus with short setae, shorter than half-length of left surstylus ( Fig. 2E ) ................................................................. 2

2. Hind tibia arched ( Fig. 5E ); mediotergite yellow with two black stripes on lateral margins; antenna with scape and pedicel brown ( Fig. 5C ); hypandrium 2× as long as wide ( Fig. 6A ); dorsobasal process of right lamellae longer and slender ( Fig. 6B ) ....................... Scelolabes verasilvae sp. nov.

– Hind tibia straight, not arched ( Fig. 1A ); mediotergite brown; antenna with scape and pedicel yellow ( Fig. 1D ); hypandrium as longer as wide ( Fig. 2A ); dorsobasal process of right lamellae shorter and wider ( Fig. 2B ) ....................................................................................... Scelolabes amorimi sp. nov.

Figures

Fig. 3. Scelolabes bivittatus Philippi, 1865 (INPA). A–B. Lateral habitus A. Male. B. Female. C. Halter, row of spine-like setulae in evidence. D. Antenna of male in lateral view. E. Occiput of male in dorsal view. F. Scutum of male in dorsal view. G. Wing of male. H. Abdomen of male in dorsal view.

Fig. 4. Scelolabes bivittatus Philippi, 1865. A–F. Male terminalia. A. Ventral view. B. Dorsal view. C. Left lateral view. D. Right lateral view. E–F. Surstyli in frontal view. E. Left. F. Right. G. Female terminalia in ventral view. Scale bars = 0.1 mm.

Fig. 1. Scelolabes amorimi sp. nov. A. Holotype, ♂ (MNHN). B. Paratype, ♀ (MNHN). C–H. Paratypes (MNHN). A–B. Lateral habitus. C. Halter, row of spine-like setulae in evidence (arrow). D. Antenna in lateral view. E. Occiput of male in dorsal view. F. Scutum in dorsal view. G. Wing of male paratype. H. Abdomen in lateral view. Abbreviations: bm = basal medial cell; br = basal radial cell; CuA = anterior branch of cubital vein; cua = anterior cubital cell; CuA+CuP = anterior branch of cubital vein + posterior branch of cubital vein; dm = discal medial cell; M 1+2 = first branch of media; M 4 = fourth branch of media; R1 = anterior branch of radius; R2+3 = second branch of radius; R4+5 = third branch of radius; Rs = radial sector.

Fig. 5. Scelolabes verasilvae sp. nov. A, C–G. Holotype, ♂ (CNC). B. Paratype, ♀ (CNC). A. Lateral habitus. B. Lateral habitus of female. C. Antenna in lateral view. D. Scutum in dorsal view. E. Hind legs. F. Abdomen in dorsal view. G. Wing. Fig. 5B provided by Bradley Sinclair.

Fig. 2. Scelolabes amorimi sp. nov. A–F. Male terminalia. A. Ventral view. B. Dorsal view. C. Left lateral view. D. Right lateral view. E–F. Surstyli in frontal view. E. Left. F. Right. G. Female terminalia in ventral view. Abbreviations: bac scl = bacilliform sclerite; cerc = cercus; epand = epandrium; hypd = hypandrium; hyprct = hypoproct; ph = phallus; projc = projection; sbepand scl = subepandrial sclerite; st = sternite; sur = surstylus. Scale bars = 0.1 mm.

Fig. 6. Scelolabes verasilvae sp. nov., male terminalia. A. Ventral view. B. Dorsal view. C. Left lateral view. D. Right lateral view. E–F. Surstyli in frontal view. E. Left. F. Right. Scale bars = 0.1 mm.