Blaena, Walker, 1868

Key to the species of Blaena

1. Hemelytra conspicuously shortened, membrane strongly reduced ( Figs 29 View Fig , 97 View Fig )............................ 2 - Hemelytra normally developed, membrane large ( Figs 19 View Fig , 28 View Fig , 33 View Fig , 49 View Fig , 58 View Fig , 68 View Fig , 79 View Fig , 98 View Fig ) ........................... 3

2. Small species, body length not exceeding 3.0 mm; membrane strongly reduced, narrow ( Fig. 97 View Fig ); lateral margins of pronotum with 5—6 submarginal setigerous punctures bearing hair-like setae..................... B. tamasi J.A. Lis - Large species, body length exceeding 3.0 mm (3,55—4,20); membrane large, flap-like ( Fig. 29 View Fig ); lateral margins of pronotum with 8—10 submarginal setigerous punctures bearing hair-like setae........................ B. hirta sp. n.

3. Pronotum strongly and broadly constricted in the middle ( Fig. 19 View Fig , 21 View Figs 20–27 )..................... B. coarctata Froeschner - Pronotal margins straight or only slightly sinuate in the middle ............................................. 4

4. Lateral margins of pronotum not serrated ( Figs 2 View Figs 1–9 , 11 View Figs 10–18 , 42 View Figs 41–48 , 49 View Fig , 51 View Figs 50–57 , 58 View Fig , 62 View Figs 59–67 , 79 View Fig , 83 View Figs 80–89 ), or with 1—2 projections ( Figs 33 View Fig , 35 View Figs 34–40 , 91 View Figs 90–96 ) ............................................. 5 - Lateral margins of pronotum strongly serrated, with numerous (4—11) small sharp denticles ( Figs 28 View Fig , 31 View Figs 30–32 , 68 View Fig , 71 View Figs 69–78 , 98 View Fig , 101) ............................................ 12

5. Costal margin without setigerous punctures bearing hair-like setae; paraclypei forming a strong, irregular ridge on either side of clypeus................................. 6 - Costal margin with 4–17 setigerous punctures bearing hair-like setae; paraclypei without irregular ridge on either side of clypeus....................................... 7

6. Lateral margins of pronotum strongly explanate, each bearing 2 submarginal setigerous punctures, one on anterior lobe, one on the prebasal projection of posterior lobe ( Figs 33 View Fig , 35 View Figs 34–40 ); median carina on pronotum and scutellum well-developed, convex and impunctate ( Fig. 33 View Fig ); scutellum with deep lateral impression on either side of carina, and clear elevated tuberosity anteriorly; small species (4.70–5.20 mm in length)............... B. mediocarinata Froeschner - Lateral margins of pronotum not explanate, each bearing 5–6 submarginal setigerous punctures, 4–5 on anterior lobe, one on the small prebasal projection of posterior lobe ( Fig. 91 View Figs 90–96 ); median carina on pronotum and scutellum hardly visible or absent; scutellum with shallow lateral impression on either side of carina, and lacking tuberosity anteriorly; large species (5.75–6.30 mm in length).. B. subsulcata Froeschner

7. Furrow along lateral margins of abdominal sterna deep and conspicuous; body margins with less numerous setigerous punctures bearing long hair-like setae (head 3, pronotum 9–13, costal margin 4–6)............. B. setosa Walker - Furrow along lateral margins of abdominal sterna shallow, hardly visible or totally absent; body margins with more numerous setigerous punctures bearing long hair-like setae (head 4–6, pronotum 15–23, costal margin 7–17)...... 8

8. Prosternal carinae distinct and high, their apical parts forming conspicuously delimited ridges, rostral trough as deep as height of the 2nd segment of rostrum............... 9 - Prosternal carinae vague or only slightly elevated, their apical parts not forming conspicuously delimited ridges, rostral trough shallow................................ 10

9. Prosternal carinae densely covered with short woolly hairs; male posterior femur with a row of short spines, male posterior tibia strongly recurved apically ( Fig. 52 View Figs 50–57 )........................................ B. parathroposa sp. n. - Prosternal carinae bare or with single short hairs; male posterior femur with 3–4 strong spines, male posterior tibia almost straight apically ( Fig. 41 View Figs 41–48 )............................................... B. multitricha Froeschner

10. Prosternal carinae, as well as anterior margins of propleura bearing numerous golden woolly hairs; male hind femur with a row of strong spines, among these at least one clearly larger than the others ( Fig. 12 View Figs 10–18 )...... B. cirra Froeschner - Prosternal carinae, as well as anterior margins of propleura bare or bearing a few hardly visible hairs; male hind femur with a row of similar sized spines ( Fig. 61 View Figs 59–67 )......... 11

11. Male middle femur with a row of acute tubercles on posteroventral margin; male hind tibia ventrally with a row of tubercles on each margin ( Fig. 3 View Figs 1–9 )............................................. B. blothroposa Froeschner - Male middle femur with a row of strong, large spines on posteroventral margin ( Fig. 60 View Figs 59–67 ); male hind tibia ventrally with a row of large and sharp, apically downcurved spines on each margin ( Figs 58 View Fig , 61 View Figs 59–67 )............ B. pseudosetosa sp. n.

12. 2nd antennal segment longer than the 1st segment; body surface without woolly hairs; females with small spines on femora II and III; costal margin with 10—13 setigerous punctures bearing hair-like setae............ B. serrata sp. n. - 2nd antennal segment decidedly shorter than the 1st segment; body surface bearing woolly hairs; females without spines on femora; costal margin without setigerous punctures.... ............................................ 13

13. Lateral margins of pronotum with 8—10 denticles with setigerous punctures bearing long setae; large species, body length clearly exceeding 3.0 mm......... B. hirta sp. n. - Lateral margins of pronotum with 5—6 denticles with setigerous punctures bearing long setae; small species, body length not exceeding 3.0 mm......... B. tamasi J.A. Lis