Blaena tamasi J.A. Lis, 1999

Blaena tamasi J.A. Lis, 1999

( Figs 97-106 View Fig View Fig View Figs 99–106 )

Blaena tamasi J.A. Lis, 1999a: 53 .

Redescription

Body ( Figs 97 View Fig , 98 View Fig ). Small, 2.65—2.88 in length, elongate, sides subparallel, dorsally weakly convex. Dorsum and venter with crowded, coarse punctures, and numerous clearly visible semierect, recurved apically, shiny hairs. Entire body blackish brown, with lateral margins, hemelytra, antennae and legs more brown or even castaneous in colour; tarsi and rostrum yellowish brown; membranal rim ochreous, more or less dusky, usually paler at base.

Head ( Figs 99, 100 View Figs 99–106 ). About 1.5 times wider than long, lateral margins subparallel, slightly concave in a front of eyes; paraclypei longer than clypeus and joined anteriorly; each paraclypeus with 4—5 setigerous punctures bearing long hair-like setae, among these 2—3 submarginal ones; bucculae finely pilose, narrowed posteriorly; eyes small, ocular index 3.7—4.1, ocelli very small; rostrum reaching posterior coxae; length of antennal segments: I 0.14—0.15, II 0.08—0.09, III 0.28—0.29, IV 0.30—0.33, V 0.39—0.44.

Prothorax. Pronotum ( Figs 97 View Fig , 98 View Fig , 101) about 1.7—1.8 times broader than long, its anterior margin deeply concave, the posterior margin concave in the middle, lateral margins flattened and expanded, with 5—6 distinct projections each bearing basally long hair-like seta; transverse postmedial impression shallow. Prosternum black, punctured; prosternal carinae high, well visible, bearing fine golden hairs. Propleuron coarsely punctured, its anterior margin bearing woolly hairs, lateral parts sparsely punctured, almost bare.

Mesothorax. Scutellum subtriangular, very short, 1.3—1.4 times wider long ( Figs 97 View Fig , 98 View Fig ); punctation and pilosity of scutellar disc similar to that of pronotum; median line hardly visible, carinate to a degree apically. Mesopleuron punctured, mesoplaural evaporatorium reaching lateral margin of mesopleuron. Staphylinoid form ( Fig. 97 View Fig ) with corium reduced to triangular pads reaching to intersegmental suture 3 / 4 of abdomen, clavus unseparated from corium and membrane very narrow, rim-like; hind wings present, small and subtriangular, reaching the base of 3rd abdominal segment. Macropterous form ( Fig. 98 View Fig ) with corium normally developed and divided into clavus, meso- and exocorium, and normally developed membrane, not reaching the tip of abdomen. Costa flattened and expanded, bearing numerous recurved hairs, but without setigerous punctures.

Metathorax. Metapleural evaporatorium small, not reaching lateral and posterior margins of metapleuron.

Legs. Femora unarmed, only the posterior ones with very small ventral tubercles in males; anterior tibiae only slightly broadened apically; posterior tibiae straight with short dark spines and short pale coloured hairs.

Abdomen. Sterna convex, without a lateral, submarginal furrow, surface closely and coarsely punctured and bearing semi-erect shiny hairs, except for shiny lateral impunctate band on visible segments IV in males (partly also on III and V segments); posterolateral angles of each pregenital segment distinctly projecting. Male genital capsule as in Fig. 105 View Figs 99–106 , paramere as in Figs 102–104 View Figs 99–106 . Female genital plates narrow ( Fig. 106 View Figs 99–106 ), densely punctate.

Material examined. WESTERN AUSTRALIA: 1 male (holotype) 2 males (paratypes) 2 females (paratypes), W. Australia, Treen Brook S.F. , No. 1492, 25.I.1979 - 6.III.79, pit trap ( ANIC, HNHM, DBUO) ; 3 males (paratypes) 1 female (paratype) 1 female (macropterous), W. Australia, Gleneagle S.F. , No. 1487, 25.I.1979 - 6.III.79, pit trap ( HNHM, DBUO) .

Distribution. Western Australia.

Remarks

This species was hitherto known only from specimens with staphylinoid wing modification; fortunately, we have also examined one macropterous female in this study. It has all the same characters but for the normally developed wings ( Fig. 98 View Fig ) and one additional setigerous puncture on margin of head ( Fig. 100 View Figs 99–106 ).