Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 85. (Budapest 1993)

Zanetti, A.: Contribution to the knowledge on Eastern Palaearctic Eusphalerum Kraatz with descriptions of new species (Coeloptera, Staphylinidae: Omaliinae)

covered with dense, closed forests: the lower regions carry coniferous woods, but this strip soon changes into predominating deciduous forests. The shrub level is very rich in both of them and thus the undergrowth is also most varying. The region is rich of water" (MAHUNKA & STEINMANN 1971). Phenology and ecology - The specimens were collected in May, by netting from roadside shrubs and flowers. Eusphaierum steinmanni sp. n. (Figs 15-16,41) Material examined - Holotype, male and 6 paratypes, males labelled: Korea, Prov. Kanwon, Kum-gang san, Man-mul san, 30.V.1970, Hung. Zool. Exp. 1 in Korea, No. 66, leg. Dr. S. MAHUNKA et Dr. H. STEINMANN (holotype and 4 paratypes: HNHM; 2 paratypes: Z). Diagnosis - Eusphaierum extremely similar to pale specimens of E reitteri (BERNHAUER) (with reddish yellow head and pronotum), and to E. sibiricum (LUZE), distinct from both in aedeagus much larger, with narrow and nearly straight parameres, and internal sac with complex groups of spicules. Measurements of holotype - Width of head: 0.51 mm; length of head, from clypeus to neck: 0.27 mm; width of pronotum: 0.61 mm; length of pronotum: 0.42 mm; length of elytra, from shoulder to apex: 0.% mm; width of eh/tra: 0.83 mm; length from clypeus to apex of elytra: 1.64 mm; total length, with partially retracted abdomen: 2.1 mm. Derivatio nominis - The species is dedicated to Dr. HENRIK STEINMANN, dermapterist at the Hungarian Natural History Museum until 1987. Description of holotype - Head reddish yellow, slightly darkened on neck, pronotum reddish yellow, elytra yellowish, abdomen black with two apical segments yellowish thrown, metasternum blackish, legs and antennae yellowish. -Head transverse (width/length ratio = 1.8), with prominent eyes, infraorbital carina well-developed; temples short; punctation fine, loose and irregular, distance between punctures wider than their diameter on average, interspaces slightly bright, microsculpture with mainly isodiametrical mesh, evanescent in front; with lengthened mesh at internal margin of the eyes, where true longitudinal strips are absent; subantennal depressions wide and rather deep, anteocellar pits superficial but almost confluent with subantennal depressions; antennae with 1st and 2nd segment ovoid, 2nd shorter than 1st, 3rd conical, lengthened, 4th and 5th slightly longer than wide, 6th and 7th subsquare, 8th to 10th slightly transverse, 11th lengthened; pubescence very short, scarcely evident. - Pronotum slightly transverse (width/length ratio = 1.4), widest in fore third; fore margin slightly narrower than hind, lateral margins rounded forward, convergent caudalty in straight line; surface convex with two weak elevations at sides of median line, little closer to hind margin than to fore one; depressions near hind angles narrow; surface slightly bright with clear isodiametrical microsculpture and punctation scarcely deep and dense, distance berween punctures wider than their diameter on average; pubescence very short, scarcely evident. -Elytra 2.2 times longer and 1.3 times wider than pronotum, little dilated caudally, truncated at apex as in Fig. 41; bright, with punctation rather strong and dense, distance between punctures less than their diameter on average. Abdomen scarcely bright, with less marked microsculpture and long, sparse, decumbent pubescence; abdominal sternites without particular characters. -Tibiae straight, fore tibiae distinctly dilated from base to apex, middle and hind ones slightly dilated from base to apex. - Aedeagus large (Figs 15-16) with narrow and feebly sinuous parameres, with elongated apical dilatation provided with several hairs; median lobe distinctly narrower than basal bulb, abruptly narrowed in pointed apex; internal sac with characteristic complexes of spicules. Sexual dimorphism - I was unable to distinguish the females of this new species from those of E. reitteri with which E. steinmanni was collected sympatrically in the Kumgang-san. The shape of elytral apex must be similar to that of males (Fig. 41). Variability - Size: 1.7-2.1 mm; colour constant; pronotum sometimes duller with more irregular surface. Remarks - I could not find any character that separates the females of this new species from those of E. reitteri (LUZE) with reddish yellow pronotum. The scarcely