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548 LECH BOROWIEC Clypeus narrow, as wide as long, flat, with fine clypeal grooves running close to margin of eyes, converging in a triangle with obtuse top (Fig. 3). Surface glabrous, with several small punctures. Labrum shallowly emarginate. Prosternal process strongly expanded apically (Fig. 3), apex rhomboidal, with few large punctures, its surface appears slightly irregular. Antennae elongate, exceeding lateral margin of pronotum by their last two segments. Length ratio of antennal segments: 100:55:88:66:57:55:72:72:66:66:122. Segment 3 approximately 1.6 times as long as 2 and circa 1.3 times as long as segment 4 (Fig. 4). Tarsi moderately broad, last segment not longer than the third, without projecting flanks, claws not reaching beyond marginal setae, simple (Fig. 5). Aedeagus quite stout, distinctly narrowed basally, apex broadly rounded with small apical process. In profile, aedeagus gently curved ventrad (figs 6, 7). TYPES Holotype: “THAI 1-8.V.1993, SOPPONG PAI 1800 m., PACHOLATKO & DEMBICKY leg.”; four paratypes: the same data (holotype preserved at the Department of Systematic Zoology and Zoogeography, University of Wroc³aw, Poland; paratypes at the Department of Systematic Zoology and Zoogeography, University of Wroc³aw, Poland, in coll. J. VOØISEK, Jirkov, Czech Republic, and in coll. J. BEZDÌK, Brno, Czech Republic). Cassida paiensis n. sp. ETYMOLOGY Named after its locus typicus, Pai in NW Thailand. DIAGNOSIS Regularly convex elytral disc, simple claws and almost wholly black pronotal and elytral disc place this species close to Cassida probata SPAETH and its relatives. The group comprises also Cassida subprobata (CHEN et ZIA), C. mroczkowskii BOROWIEC et ŒWIÊTOJAÑSKA, and two species described in this paper – C. chiangmaiensis n. sp. and C. dembickyi n. sp. C. subprobata differs distinctly in yellow abdomen, with only first sternite with black margins or spots (in C. paiensis abdomen in middle is black). C. mroczkowskii differs in sparse punctuation of elytral sides with distance between punctures partly as wide as to slightly wider than puncture diameter (in C. paiensis punctuation is dense, punctures almost touching each other). C. dembickyi and C. chiangmaiensis differ in uniformly yellow antennal segments or with only the last segment infuscate apically (in C. paiensis at least three apical segments are infuscate). C. probata is the most similar, especially in its infuscate apically antennae, but differs in more sculptured elytral disc, with distinct folds also behind the postscutellar elevation
NEW RECORDS OF ASIATIC AND AUSTRALOPAPUAN CASSIDINAE 549 (in C. paiensis behind the postscutellar H-shaped elevation have no folds, or they are indistinct and surface of elytra appears regular), and in shape of black pronotal spot with anterior margin distinctly trilobate (in C. paiensis the spot is triangular, 10-14. Cassida paiensis: 10 – dorsal, 11 – lateral, 12 – head and prosternum, 13 – antenna, 14 – claw
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Genus Vol. 12(4): 493-562 Wroc³aw,
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