Hebecnema vespertina (Fallén), Fallen

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 : 339-345

Hebecnema vespertina (Fallén)

( Figs 7 A‒D)

Material examined. [ NHMD]: Large sample of males and females from: Austria, Denmark, Finland, France (incl. Corsica), Greece, Italy (incl. Sicily), Norway, Spain, Sweden and Switzerland.

Diagnosis. Parafacials dull greyish pruinose in anterodorsal view. Thorax and abdomen with dark shine through thin grey to brownish grey pruinosity. Male wing with distinct brown clouding; female wing with a light brownish tone. Calypteres light ochre yellowish, more or less paler than wing base. Halter yellow. Legs wholly brownish black to black. Male abdomen with pruinosity delimiting a narrow median dark stripe on tergites III‒V, sometimes only on tergite III; female abdomen shiny black through sparse pruinosity without indication of a median dark stripe. Eye practically bare in both sexes. Distance between presutural rows of acrostichal setae equal to or slightly larger than 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 1‒2 av setae. Male terminalia ( Figs7 A‒D); shape and chaetotaxy of surstyli and cerci distinctive, most closely resembling these parts in H. anthracina and H. anthracinella sp. nov. Ovipositor of the H. vespertina type ( Fig. 8C ).

Figures

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.

FIGURE7. Hebecnema vespertina (Fallén). Male terminalia. A, B. Sternite V in ventral and lateral views. C, D. Cerci, surstyli and epandrium in posterior and lateral views.