Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 94. (Budapest 2002)

Ahrens, D.: Notes on distribution and synonymy of sericid beetles of Taiwan, with descriptions of new species (Coleoptera, Scarabaeoidea: Melolonthidae)

and widely sinuate medially, anterior surface of labroclypeus deeply, concavely excavated within sinuation; surface flat, finely and coarsely, not densely punctate, larger punctures with fine erect hairs; frontoclypeal suture feebly incised but distinctly elevated and weakly curved; smooth area in front of eye almost twice as wide as long; ocular canthus very short and triangularly pointed, with very fine, not dense punctures and two long terminal hairs. Frons with fine, moderately dense punctures, in anterior half mixed with coarse ones bearing fine erect hairs. Eyes moderately large, ratio of diameter/ interocular width: 0.76. Antenna yellow, 10-segmented; club with four segments, 1.5-times as long as remaining segments together. Mentum weakly elevated, anteriorly feebly convex. Pronotum transverse, widest at base, lateral border from base to middle subparallel, in anterior half weakly curved narrowed anteriorly, anterior angles protruding and not acute, slightly rounded at the tip, hind angles blunt, anterior margin medially without marginal line but strongly convexly produced; surface densely and coarsely punctate, punctures with microscopicaly fine hairs; anterior and lateral border setaceous. Scutellum slender, triangular, with fine and dense punctures, apical third and along lateral margins smooth. Elytra oblong, distinctly widened posteriorly, striae distinctly impressed and very finely and densely punctate, intervals convex, with fine and sparsely scattered punctures concentrated along striae, odd intervals with few fine, long and erect hairs; epipleural edge fine, ending at strongly curved external apical angle of elytra, epipleura densely setaceous, apex chitinous, without microtrichomes. Ventral surface shiny, finely and not densely punctate, metasternum sparsely hairy at sides, metacoxal plates only with microscopicaly fine hairs, laterally with a few longer ones; each abdominal sternite with a transversal irregular row of coarse punctures bearing thick hairs between fine and dense punctation, in the punctures with fine, moderately long hairs, at sides additionally with thick hairs. Mesosternum between mesocoxae half as wide as mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.33. Pygidium apically strongly convex, finely and densely punctate, medially with a smooth longitudinal line, with fine, long and dense hairs. Legs slender, femora shiny, with two longitudinal rows of hairs, between them only finely and sparsely punctate; metafemur anteriorly sharply edged, without serrated line, posterior margin neither dorsally nor ventrally serrated, in basal half with a few long hairs. Metatibia slender and long, widest at apex, ratio width/ length: 1/3.6, dorsally sharply edged and apical two-thirds completely serrated, with two groups of spines, basal one at one-third, apical one at two-thirds of metatibial length; outside longitudinally convex, with sparsely scattered, fine punctures and fine short hairs; inside sparsely scattered, finely punctate, apex interiorly near tarsal articulation deeply truncate; ventral and apical margin strongly serrated. Tarsal segments dorsally impunctate, ventrally with sparse short setae; metatarsal segments sharply edged laterally, ventrally with a strongly serrated ridge, and dorsally with a strong longitudinal groove, rugose; first metatarsomere distinctly shorter than the two following segments combined and one-third longer than the upper tibial spur. Protibia moderately long, bidentate, claws of anterior asymmetrical, basal tooth of inner claw larger than that of other claws and bluntly truncate. Aedeagus: Figs 14-16. Notes - Compared to N. exisoclypeata, N. habonensis sp. n. is slightly larger, the antennái club is distinctly shorter and less curved, and the anterior angles of the pronotum protrude more strongly. The two species may easily be separated by characters of the male genitalia.