Eutetrapha metallescens ( Motschulsky, 1860 )

Lin, Mei-Ying, Bi, Wen-Xuan & Yang, Xing-Ke, 2017, A revision of the genus Eutetrapha Bates (Coleoptera: Cerambycidae: Lamiinae: Saperdini), Zootaxa 4238 (2), pp. 151-202 : 187-188

Eutetrapha metallescens ( Motschulsky, 1860)

Figs. 115–121 , 152 f & 152g

Saperda metallescens Motschulsky, 1860: 150 , pl. X. fig. 2. Type locality: Russia, Siberia. Type depository: ZMUM. Eutetrapha metallescens: Bates, 1884: 256 ; Heyden, 1885: 310; Okamoto, 1927: 83; Plavilstshikov, 1930: 55; Wu, 1937: 761; Matsushita, 1933: 403; Gressitt, 1951: 555; Breuning, 1966: 676; Pu, 1980: 107, pl. XI, fig. 148; Pu & Jin, 1991: 189; Lee, 1987: 198, pl. 24, fig. 271; Hua, 2002: 208; Hua et al., 2009: 213, 354, pl. LXXVIII, 898; Löbl & Smetana, 2010: 323; Jang et al., 2015: 358, figs.; Hwang, 2015: 450, figs.

Saperda metallescens ; Abdullah & Abdullah, 1966: 89.

Supplementary description. Male genitalia ( Figs. 117–120 ): Tergite VIII ( Figs. 117 a, 117c) broader than long, apex rounded, with sparse and short setae. Spiculum gastrale much shorter than ringed part of tegmen in length, spiculum relictum shorter than a half of spiculum gastrale. Tegmen ( Figs. 118 a–c) length about 3.4 mm; lateral lobes stout, each about 0.4 mm long and 0.2 mm wide ( Fig. 118 d), apex truncated and with fine setae which are as long as or shorter than lateral lobes, basal 2/3 strongly expanded in lateral view ( Fig. 118 ); median lobe slightly curved ( Fig. 119 b), much longer than tegmen (9:7); median struts about half-length of median lobe ( Fig. 119 c); apex of ventral plate ( Fig. 119 a) sharply pointed; endophallus two times as long as median lobe, with two pairs of basal plate-like sclerites (located right behind apex of median struts), two bands of indistinct supporting armature, and three rod-like sclerites at end ( Fig. 120 ), two longer ones each about 2.4 mm, much shorter than tegmen, short one about 1.9 mm. Female genitalia: spermathecal capsule ( Fig. 121 ) composed of an apical orb and a strongly curved stalk, strongly sclerotized part of stalk shorter than apical orb in length. Spiculum ventrale subequal to abdomen in length. In our observation, spiculum ventrale measured 8.0 mm for an adult compared with abdomen which measured 7.8 mm in ventral view.

Diagnosis. Among the congeners with metallic scales, this species can be easily distinguished by the smaller black maculae on both pronotum and elytra, especially the narrow black hook on apical half of elytra, and the distinct apex of lateral lobes of tegmen ( Figs. 118 a–e).

Host plants. Prunus armeniaca Linnaeus (Rosaceae) , Salix sp. ( Salicaceae ).

Remarks. Shaanxi was first reported by Zhou et al. (1988) but we believe that was a misidentification of E. shaanxiana Lin & Yang sp. nov., which may be confirmed by the figure 143 in that book. Therefore, we remove it from that locality list in this work.

Distribution. China: Heilongjiang, Jilin, Liaoning, Hebei, Shandong; Russia (Amur, E. Siberia), North Korea, South Korea.

Other specimens examined. Heilongjiang: 1 female, Maoershan, 1931. VIII.19 ( IZAS) ; 1 female, Dailing, 1957. VII.9 (IZAS); 1 female, Dailing, Liangshuigou, 1957. VII.25 (IZAS); 1 female, Dailing, alt. 390 m, 1957. VIII.22, leg. Zhong He (IZAS); 1 female, Hengdaohezi, 1939. VII.15 (IZAS); 1 female, Ercengdianzi, 1938. VI.5 (IZAS); 1 female, Ercengdianzi, 1941. VI.15 (IZAS). Jilin: 1 female, Fusong, 1955. VI.5 ( IZAS) ; 1 male, Changbaishan, 1982. VII.17, leg. Bao-Lin Zhang (IZAS); 2 females, Changbaishan, alt. 740 m, 1991. VII.17–26, leg. Pei-Yu Yu (IZAS); 1 female, Changbaishan, alt. 740 m, 1993. VII.4–7, leg. Pei-Yu Yu (IZAS). Liaoning: 2 females, Gaolingzi, 1937. VII.3 ( IZAS) ; 2 males 3 females, Gaolingzi (IZAS). Hebei: 4 females, Zunhua, E. Tomb ( IZAS) . Shandong: 1 female, Qingdao, 1937.VIII, leg. V. J. Tolmachow ( IZAS) .

Figures

FIGURES 115 – 116. Eutetrapha metallescens (Motschulsky, 1860), habitus. 115. Male, from China, Jilin. 108. Female, from China, Jilin; a. Dorsal view, b. Lateral view. Scale 2 mm.

FIGURES 117 – 121. Terminalia of Eutetrapha metallescens (Motschulsky, 1860), from China, Jilin. 117. Tergite VIII and sternites VIII & IX. 118. Tegmen. 118 d. Lateral lobes in ventral view, showing the ridge at base and the expanded apex. 118 e. Lateral lobes in lateral view, showing the hairs on ventral side of the expanded base. 119. Median lobe plus endophallus. 120. Rod-like sclerites. a. Ventral view, b. Lateral view, c. Dorsal view. 114. Female from China, Jilin, showing the spermatheca. Scale 1 mm, 118 d, 118, 119 b, 119 c and 121: not to scale.

FIGURES 148 – 155. Scales, elytral apex and tarsus. f. Scales on scutellum and elytron (left of scutellum). g. Scales on pronotum (nearly middle, besides the left black spot). h. Lateral view of left elytron. i. Elytral apex. j. Hind tarsus, showing the hairs at sides. k. Scales on scutellum. 148. Eutetrapha chrysochloris chrysochloris (Bates, 1879). 149. E. chrysochloris chrysargyrea Bates, 1884. 150. E. shaanxiana Lin & Yang, sp. nov.; h- 1, male; h- 2; female. 151. E. tianmushana Lin & Bi, sp. nov. 152. E. metallescens (Motschulsky, 1860). 153. E. lini Chou, Chung & Lin, 2010. 154. E. gui Lin & Yang, sp. nov. 155. Paraglenea virides (Pu & Jin, 1991) comb. nov. Scale 100 µm.