Macrostomus ciliaticosta Rafael & Cumming, 2006

Rafael, José Albertino & Marques, Dayse Willkenia A., 2021, Four new species of Macrostomus Wiedemann and a checklist of Empididae s. str (Diptera) from Peru, Zootaxa 4981 (3), pp. 506-530 : 519-520

Macrostomus ciliaticosta Rafael & Cumming

( Figs 10A–G )

Macrostomus ciliaticosta Rafael & Cumming, 2006: 52 . Type locality: Peru, Cuzco, Quincemil .

M. ciliaticosta: Yang et al., 2007: 145 (cat.).

Diagnosis. Male. Two pairs of ocellar setae; thorax yellow with scutum and scutellum brown to black ( Fig. 10A ); hind tibia ( Fig. 10A ) with 5–6 dorsal setae; wing brown infuscated along costal cell and apex of cell r 2+3 ( Fig. 10A ); cell dm somewhat acute; veins M 1, M 2 and CuA+CuP somewhat distinct; tergite 8 ( Figs 10B, C ) with somewhat acute truncated distal projection; epandrium ( Fig. 10B ) with anterodorsal and posterodorsal lobes of subequal height; anterior cercus ( Fig. 10B ) somewhat narrow; median cercus with slender setae; posterior cercus ( Fig. 10B ) with apex acute and with a few long slender setae at margin, with wide ventral protuberance and many marginal yellow setae; hypandrium ( Fig. 10D ) with distinct bifid branch posteriorly, with many setae along posterior margin and distinct membranous area; in posterior view with apical lateral projections inwardly directed ( Fig. 10E ).

Female. Hind tibia with 4 long dorsal setae and short dorsal pinnate setae along distal half; hind tarsomere 1 with 1 slender dorsal seta; sternite 8 ( Fig. 10F ) with a subapical paired sclerotized protuberance, medially with a longitudinal somewhat membranous line, laterally with median third less sclerotized; genital fork ( Figs 10F, G ) Yshaped with rather strong lateral arms and a median short protuberance ventrally, with genital chamber membranous.

Geographical records. Brazil, Ecuador, Peru.

Material examined. Listed in Rafael & Cumming (2006).

Remarks. This species was described based on specimens from Brazil, Ecuador and Peru and no additional specimens of this species were studied.

Figures

FIGURE 10. Macrostomus ciliaticosta Rafael & Cumming, 2006. ♂ (A–E). A. Habitus, lateral view; B. Apex of abdomen, lateral view; C. Tergite 8, dorsal view; D. Hypandrium and phallus, lateral view (black arrow indicating the membranous area); E. Phallus, posterior view. ♀ (F–G). F. Apex of abdomen, lateral view; G. Apex of abdomen, dorsal pieces in dorsal view, ventral pieces in ventral view. Scale bars, figures A = 1 mm; B, F, G = 0.3 mm; C–E = 0.2 mm.Abbreviations: a ce, anterior cercus; epand, epandrium; gen fk, genital fork; gen ch, genital chamber; m ce, median cercus; p ce, posterior cercus; st, sternite; t, tergite.