Ocnaea Erichson, 1840

Gillung, Jéssica Paula & Carvalho, Claudio José Barros De, 2009, Acroceridae (Diptera): a pictorial key and diagnosis of the Brazilian genera, Zootaxa 2175, pp. 29-41 : 38

Ocnaea Erichson, 1840

( Figs. 14 , 17, 19, 21, 22)

Ocnaea Erichson, 1840: 153 . Type species: Ocnaea micans Erichson, 1840 .

Diagnosis. Eyes pilose and holoptic below antenna ( Fig. 22 ). Antenna at the vertex, almost erect ( Fig. 14 , 19 , 22 ); scape and pedicel short, flagellum usually longer than head ( Fig. 19 ). Proboscis much shorter than antennae ( Fig. 14 ). Wing hyaline, with or without microtrichia; venation varies in different species, but vein R4 is always present (Fig. 17, 21). In the female, the wing extends a little beyond the tip of abdomen.

References. Cole (1919), Schlinger (1961).

Brazilian species. O. lugubris (Gerstaecker, 1856) [ Brazil, Bahia (type-locality)].

Figures

FIGURES 13, 14. 13. Body, lateral view, Lasia sp. 2; 14. Head, lateral view, Ocnaea sp. 1.

FIGURES 22, 23. 22. Head, antero – lateral view, Ocnaea sp. 1.; 23. Head, dorsal view, Ocnaea sp. 1.

FIGURES 18, 19. 19. Head, lateral view, Pterodontia sp. 1; 19. Head, lateral view, Ocnaea sp. 1.