Hebecnema nigricolor (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

Hebecnema nigricolor (Fallén)

( Figs 5 A‒D)

Material examined. [ NHMD]: Sample of males and females from: Denmark, Greece, Norway, Spain and Sweden.

Diagnosis. Parafacials dull brownish grey. Thorax and abdomen brownish grey pruinose with a distinct black subshine; female mesonotum with four indistinct dark stripes visible in posterior view; male abdomen light brownish grey pruinose without traces of a median dark stripe; female abdomen grey pruinose with dark reflections and a blurred median dark stripe reaching hind margin of tergite IV. Wing and calypteres with brown clouding that tends to be more intense in males than females. Halter yellow. Legs brownish black with mid and hind femora and all tibiae yellow. Eye practically bare. Male head in profile with middle part of parafacial concealed or very narrowly visible behind the eye. Distance between rows of very fine presutural acrostichal setae about twice their distance to adjacent dorsocentral rows; setulae between acrostichal rows arranged in four irregular rows. Vein C on distal half with a row of setulae on dorsal surface. Hind tibia with (1‒)2 av setae. Male terminalia ( Figs 5 A‒D); shape of cerci species distinctive. Ovipositor of the H. umbratica type ( Figs 8A, B ).

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.

FIGURE5. Hebecnema nigricolor (Fallén). Male terminalia. A, B. Sternite V in ventral and lateral views. C, D. Cerci, surstyli and epandrium in posterior and lateral views.