Stylogaster hugoi Rocha & Mello-Patiu, 2012, sp. nov.

Stylogaster hugoi sp. nov.

(Figs 6–17)

Diagnosis — body color mainly yellow; facial carina forming a right angle with the fronto-orbital plate; thick postpronotal lobes; white setae covering the foreleg to second tarsomere; male sternite 5 with central projection and cerci wider than posterior surstyli; female terminalia with lateral lobes as wide as the hypoproct, and small semicircular indentation in sternite 8.

Male Description. Head —Frons mainly brown, with yellow apex; facial carina reaching the fronto-orbital plate in a right angle (Fig. 6); facial carina and gena yellow with golden microtomentum; fronto-orbital plate narrow; prementum black with base and apex yellow; basal sheath of prementum well developed and visible and spiral labella (Fig. 6, bs; lb); ocellar triangle brown; apex of ocellar triangle pointed, reaching the middle of the frons; ocellar tubercle prominent; the head setae are: 1 vertical, 1 ocellar, 1 occipital, 1 frontal and 3 orbital; some setulae near the facial carina (Fig. 7); occipital and genal setae white; scape and pedicel yellow; postpedicel light brown; scape with apical setulae on dorsal face; pedicel with setulae on all dorsal surface; pedicel and postpedicel of subequal size; arista enlarged at the base. Thorax —Postpronotal lobe thick; proepisternum invaginated; notopleuron as large as the postpronotal lobe, with the suture strongly demarcated; postalar callus narrower than the scutellum (Fig. 8); scutum light brown, yellowish on the margins; scutellum narrow and upwards pointing; postscutellum large, reaching half depth of the thorax; pleural sclerites yellow; proepisternal setae white; all other setae are black: 2 notopleural, 1 supra-alar, 2 postalar, 1 dorsocentral, 2 anepimeral and 1 scutellar seta (Fig. 8). Fore and mid legs yellow; fore coxa with long white fine setae with spiral apices; fore leg coated with white setae to the second tarsomere; tibial spur white; midleg similar to fore leg, but with two tibial spurs; hind coxa and trochanter brown; hind femur yellow with two transversal brown strips near the end; hind tibia brown with a median PLATE 2. Stylogaster hugoi Rocha & Mello-Patiu sp. nov., male. Fig. 6: head, left lateral view. Fig. 7: head, dorsal view. Fig. 8: thorax, dorsal view. Fig. 9: wing, dorsal view.

PLATE 3. Stylogaster hugoi Rocha & Mello-Patiu sp. nov., male. Fig. 10: fifth sternite, ventral view. Fig. 11: terminalia, left lateral view. Fig. 12: ejaculatory apodeme and sperm duct, left lateral view [ce: cercus; ph: phallus; ej apd: ejaculatory apodeme; sp dct: sperm duct; hpd: hypandrium; epd: epandrium; pgt: pregonite; su: posterior surstylus; stg: syntergosternite].

PLATE 4. Stylogaster hugoi Rocha & Mello-Patiu sp. nov., female. Fig. 13: “ovipositor”, left lateral view. Fig. 14: terminalia, left lateral view. Fig. 15: terminalia, dorsal view. Fig. 16: terminalia, ventral view. Fig. 17: egg, left laterodorsal view [ce: cercus; ll: lateral lobes of sternite 8; hyp: hypoproct; st: sternite; T: tergite].

yellow strip; hind coxa with black setae; hind trochanter and femur with long black setae on the ventral face; hind tibia with long black setae on the apical third; halter with light brown stem and brown knob; halter knob enlarged backwards. Wing with one basal alar seta; cell bm straight; A2 vein absent (Fig. 9). Abdomen —Abdominal tergites light brown, without the typical dark mark on the posterior margin; tergite 1 narrow, with black and white setae; tergite 2 with transversal line of 4 black setae; tergites 2, 3 and 4 subequal; tergite 5 a little longer than the others; sternites with small setulae. Terminalia —Terminalia mainly yellow; sternite 5 with central projection and black setulae on the posterior margin (Fig. 10); syntergosternite 7+8 with half the width of the epandrium (Fig. 11); cercus wider than posterior surstylus, with a hooked apex and black setae on the posterior margin and basal half of the external side (Fig. 11, ce); posterior surstylus with the anterior lobe smaller than posterior, with black spines on the internal side, and posterior lobe in a right angle with the posterior surstylus, white setae on the posterior margin and on the posterior lobe (Fig. 11, su); pregonite reaching the apex of basiphallus, with dense setae on the internal side (Fig. 11, pgt); phallus pale with brown regions; basiphallus membranous; distiphallus with internal sclerotized channels, chordiform concave opening, and membranous apical projection (Fig. 11, ph); ejaculatory apodeme smaller than the sperm duct, with sperm pump nearly of the same size of the apodeme (Fig. 12).

Female Description. Differs from the male by having: Compound eye with ommatidia of the central inner margin more than twice the size of the others; 1 notopleural seta; 2 supra-alars; fore and mid legs with white straight-pointed setae on the coxae; two fore and one mid white tibial spurs; hind tibial spur black; no long setulae on hind leg; abdominal tergite 1 with white setae on inferior half; tergite 2 with other differentiated setae than those of the transversal line; “ovipositor” of similar size to the abdomen; tergites 6 and 7 with dorsal setulae (Fig. 13); sternite 8 with setae over all length, and reclinate setae on the apical third (Figs. 14–16); cercus nearly of the same width but with half the length of the lateral lobes of sternite 8 (Fig. 15, ce); lateral lobes of sternite 8 with almost the same size of the hypoproct, without horizontal curvature (Fig. 16, eg); apex of syntergosternite 8+9 with a small semicircular indentation (Fig. 16).

Egg Description. Elongated chorion; two pairs of sclerotized and united recurrent spines; posterior spine conical (Fig. 17).

Etymology. This species is named in honor of the Brazilian dipterist Dr. Hugo de Souza Lopes, who worked with Neotropical Stylogaster and published several works of great quality.

Distribution. Brazil: Bahia, Pernambuco.

Type Material. HOLOTYPE—BRAZIL, Pernambuco, Caruaru, 3, V-1972, J. Lima leg. (MNRJ). PARATYPES—BRAZIL, Bahia, Itapetinga, 13 and 1Ƥ, XI-1969, F.M. Oliveira leg. (MNRJ); BRAZIL, Pernambuco, Fazenda Caruaru, 900m, 233 and 1Ƥ, IV-1972, M. Alvarenga leg.; 2 females with same data as holotype (MNRJ).