Tijdschrift voor entomologie . 52 Figs. 51, 52. N. fuscescens. Fig. 51. Ovipositor, lateralview. Figs. 53, 54. N. contrasta. Fig. 53. Ovipositor,ventral view. 56); in juscescens the extension has a concavemedial incision (fig. 43); in contrasta the medialincision is convex (fig. 48); the inner dististyleo{ fuscescens has a high posterior crest (fig. 45);in contrasta the crest is low (fig. 49); further-more there are some differences in the ventralaspect of the male sternite 8 (figs. 46, 50); fe-males of fuscescens and contrasta differ in theshape of the short hypovalvae (figs. 51, 53, witha sm
Tijdschrift voor entomologie . 52 Figs. 51, 52. N. fuscescens. Fig. 51. Ovipositor, lateralview. Figs. 53, 54. N. contrasta. Fig. 53. Ovipositor,ventral view. 56); in juscescens the extension has a concavemedial incision (fig. 43); in contrasta the medialincision is convex (fig. 48); the inner dististyleo{ fuscescens has a high posterior crest (fig. 45);in contrasta the crest is low (fig. 49); further-more there are some differences in the ventralaspect of the male sternite 8 (figs. 46, 50); fe-males of fuscescens and contrasta differ in theshape of the short hypovalvae (figs. 51, 53, witha small dorsal notch before apex in fuscescens)and by the transition of sternite 8 and the hypo-valvae (figs. 52, 54). Distribution and period of flight. — Knownfrom southern Primorye and the Japanese is-lands Tsushima, Fionshu, Kyushu and Honshu the species is sympatric with con-trasta and leeuweni and known as far north asYuze, Akita. Altitudes are up to 1200 all Japanese records are in May, a few. view. Fig. 52. Female sternite 8 and hypovalvae, ventrallateral view. Fig. 54. Female sternite 8 and hypovalvae. are from June; the records from southern Pri-morskiy kray are from June and July. Nephrotoma leeuweni spec. nov.(figs. 55-58) Type-material. — Fiolotype 6, in good con-dition, abdomen stored in microvial, labelledFionshu Nagano Tokyo, EsakiFiolotype Nephrotoma leeuweni P. Ooster-broek (ZMA). Characteristics. — Belongs to the fuscescensgroup. Differentiating characters are discussedunder fuscescens. The most salient character isthe enlarged and blackened posterior margin ofthe inner dististyle (fig. 58). Description. Body and wing length: 14 — Yellow with dorsal part of rostrumand occipital marking dark brown. The latter Oosterbroek: Nephrotoma of Japan 255
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectentomology, bookyear1
