Blaena, WALKER

GENUS BLAENA WALKER, 1868

Blaena Walker, 1868: 537 . Type species by monotypy: Blaena setosa Walker, 1868.

Macrhymenus Signoret, 1880a: 25 [ 1880b: XVII, as Macrymenus] (syn. by Distant, 1899: 224). Type species by monotypy: Macrhymenus membranaceus Signoret, 1880 (= Blaena setosa Walker, 1868).

Diagnostic characters

Body medium sized, elongate, sides subparallel; dorsum flattened to weakly convex. Lateral margins of head more or less diverging from preocular emarginations; submargins with setigerous punctures bearing hair-like setae, but no pegs and peg-like setae; paraclypei longer than clypeus and joined in front of the latter; eyes small, stylated; ocelli very small; antennae 5-segmented, segments cylindrical. Pronotum broader than long, almost subquadrate in outline; disc coarsely and densely punctured; anterior margin concave; lateral margins entire or serrated, submargins with a row of setigerous punctures bearing long hair-like setae. Scutellum broader than long, subtriangular, bearing distinct lateral depressions on either side of disc. Corium short, divided into clavus, meso- and exocorium in macropterous and brachypterous forms, undivided into parts in forms with staphylinoid wing modification; membrane large, nearly two-thirds of hemelytral length, in forms with staphylinoid wing modification membrane strongly reduced; costa with or without setigerous punctures. Propleuron densely punctured; evaporative areas well defined; apex of peritreme polished, elongated, not recurved posteriorly. Posterior tibiae simple or modified (usually in male sex).

Note

This genus belongs to the tribe Cydnini (as defined by Lis, 1994); it is easily recognizable from all other Australian genera of the tribe by the characters given in the key by Lis (1997).