Dilophotes atrorufus (Kiesenwetter, 1879)

Bic, Vlastislav, 2002, Review of the genus Dilophotes Waterhouse (Coleoptera: Lycidae) of the Palaearctic Region and Indochina, Zootaxa 59, pp. 1-26 : 8-9

Dilophotes atrorufus (Kiesenwetter, 1879)

Eros atrorufus Kiesenwetter, 1879: 305 .

Mesolycus atrorufus: Lewis, 1895: 407 .

Dilophotes atrorufus: Bocak & Bocakova, 1988: 444 . Mesolycus puniceus Gorham, 1883: 399 ; Kleine, 1933: 6.

Diagnosis. Dilophotes atrorufus is the only Japanese species with serrate antennae in the male and has a characteristic slightly curved apical part of phallus and a smaller but well sclerotized internals sac ( Fig. 11 ). Although the upper and lower plates of internal sac are not distinctly separated, the species is placed in the D. atricollis group.

Description. Body medium sized, slender, black. Pronotum black with brown pubescence, elytra slender with reddish brown pubescence. Head with short rostrum. Eyes small, interocular distance 1.63 times maximum eye diameter. Antennae serrate, considerably flattened. Maxillary palpi slender. Pronotum 1.4 times wider than long, frontal margin slightly emarginate anteriorly, anterior angles distinct, lateral margins slightly concave, posterior angles projected. Pronotal disc with sharp costa reaching slightly beyond middle of pronotal disc. Scutellum simply rounded apically. Each elytron with three longitudinal costae, costa 1 inconspicuous in apical half. Male genitalia slender, long, phallus distinctly curved apically, internal sac complex, sclerotized, upper and lower plates fused ( Fig. 11 ).

Measurements. BL 9.0 mm, WH 1.98 mm, PL 1.21 mm, PW 1.65 mm, Ediam 0.40 mm, Edist 0.65 mm.

Material examined. 1 male, 1 female, " Japon, Yumoto, pres Nikko, 6 Aout, 1911, Edme Gallois leg."; 1 specimen, " Japonia, 24. 6. 1958, Mt. Iwawaki, Sh. Mizobe lgt."; 1 male, 1 female, "Tokyo near Kamikochi, Japan, 11. 8. 1950, T. Nakane lgt."; 1 specimen, " Japon, Chuzenji, 2. 8. 1911, Edme Gallois lgt."; 1 specimen, " Japon, Yumoto pres Nikko, 11 Aout, 1911, Edme Gallois" ( LMBC).

Distribution. Dilophotes atrorufus is endemic to Japan.

Figures

FIGURES 3 ­ 13: 3: General appearance of Dilophotes berezowskii; 4: Antenna of D. lizipingensis sp. n.; 5: Basal antennomeres ­ D. atricollis; 6 ­ 8: Pronota. 6: D. moxiensis sp. n.; 7: D. lizipingensis sp. n.; 8: D. berezowskii; 9 ­ 13: Male and female genitalia. 9: D. berezowskii; 10: D. berezowskii; 11: D. atrorufus sp. n.; 12: D. bhutanensis sp. n., apical part of phallus and internal sac: up ­ upper plate, lp ­ lower plate, br ­ basal rods, ph ­ phallus; 13: D. holzschuhi sp. n.