Macrostomus paraiba sp. nov.

(Figs 29–38, 60–61)

Diagnosis. Thorax entirely black, all coxae yellow. Abdomen including terminalia black. Male tergite 8 short, with anterior and posterior sinus of same depth. Hypandrium with many paired setae medially and shallow rounded sinuosity on posterior margin. Female hind tibia with pinnate setae.

Description. Holotype male. Body length 3.0 mm; wing length 3.3 mm. Width of frons approximately ¾ anterior ocellus width. Antenna velvety black. Palpus brown. Thorax shiny black. Thoracic setae: 4 dorsocentrals, 2 antepronotals, 1–2 proepisternals, 2 pairs of scutellars. Legs shiny, predominantly yellow with apex of mid and hind femora and apex of mid tibia black; hind tibia and all tarsi black with fore and mid tarsomeres 1 yellow. Hind femur (Fig. 29) with 1 anteroventral seta at distal third. Wing (Fig. 60, paratype). Halter light brown, partially white at knob. Abdomen shiny black. Terminalia with tergite 8 short, with relatively deep anterior and posterior sinuses (Fig. 30). Epandrium with anterodorsal and posterodorsal lobes of same height (Fig. 31). Anterior cercus subquadrate in lateral view; posterior cercus elongate vertically with secondary protuberances, basal protuberance with long setae (Fig. 31). Cercal bridge (Fig. 32) small, connected with projection arising anteriorly from dorsal margin of anterior cercus. Ventral projection of cercus thin, with setae distally (as in Fig. 12 of M. albicaudatus). Hypandrium (Fig. 33) bearing many setae medially, basal setae uniseriate, with shallow rounded sinuosity on posterior margin.

Female. Legs rather yellowish. Mid tibia with 1 posterodorsal seta slightly longer near middle. Hind tibia (Fig. 34) with longer pinnate setae along dorsal margin and shorter pinnate setae along basal third ventrally. Wing (Fig. 61) brown infuscated at costal and r1 cell, and apex of r2+3 cell. Terminalia with tergite 8 and sternite 8 almost same length (Fig. 35). Sternite 8 with cleft laterally, near middle (Figs 35, 37). Genital fork (Fig. 38) small, without lateral arms. Genital chamber slightly sclerotized.

Geographical distribution. Brazil ( Paraíba).

Type Material. HOLOTYPE ♂: “ BRASIL, Paraíba, João Pessoa, Campus UFPB [Universidade Federal da Paraíba]” (INPA). PARATYPES. BRAZIL. Same data as holotype (2♂, 1♀ INPA; 2♂ CNC); João Pessoa, Mata Atlântica, 15.vi.–15.vii.1986, D.S. Amorim, Malaise (1♀ CNC).

Holotype condition. Pinned, in good condition except flagellum and right wing lost. Not dissected.

Etymology. Named after the Brazilian State where the specimens were collected, Paraíba .

Discussion. See under M. amazonensis sp. nov.