Hebecnema nigra (Robineau-Desvoidy)

Michelsen, Verner, 2019, Macaronesian Muscidae (Diptera). I. The genus Hebecnema Schnabl with description of a new Canarian endemic species and a review of the European fauna, Zootaxa 4706 (2), pp. 332-348 : 339

Hebecnema nigra (Robineau-Desvoidy)

( Figs 6 A‒D)

Material examined. [ NHMD]: Large sample of males and females from: Austria, Denmark, France, Greece, Italy (Sardinia), Spain and Sweden. Also from: Morocco and Tunisia.

Diagnosis. Parafacials in anterodorsal view silvery white pruinose. Thorax and abdomen with dark shine through thin grey to brownish grey pruinosity. Legs mainly brownish black to black, but at least mid and hind tibiae translucent ochre yellow to yellow. Wing light brownish clouded, calypteres dirty whitish, distinctly paler than wing base. Halter blackish on distal half. Male abdomen with grey pruinosity delimiting a distinct median dark stripe on tergites III‒V; female abdomen shiny black through sparse dark greyish pruinosity without indication of a median dark stripe. Eye practically bare in both sexes. Male head in profile usually with parafacial narrowly visible behind the eye. Distance between presutural rows of relatively strong acrostichal setae about the same as their distance to adjacent rows of dorsocentral setae; setulae between acrostichal rows in two irregular rows. Vein C bare on dorsal surface. Hind tibia with only 1 av seta. Male terminalia ( Figs 6 A‒D) species distinctive. Ovipositor of the H. vespertina type ( Fig. 8C ).

Figures

FIGURE 6. Hebecnema nigra (Robineau-Desvoidy). Male terminalia. A, B. Sternite V in ventral and lateral views. C, D. Cerci, surstyli and epandrium in posterior and lateral views.

FIGURE 8. Hebecnema spp. Ovipositor, left half only, except for sternites VI and VII. A, B. H. umbratica (Meigen). C. H. anthracinella sp. nov. Abbreviations: Ce = cercus; Ep = epiproct; Hy = hypoproct; St = sternite; T = tergite.