Agrilus acastus Kerremans

Figs. 13, 65

acastus Kerremans, 1913: 114 .

Miwa, 1931: 125. Obenberger, 1936: 1069. Miwa & Chûjô, 1936: 15. Kurosawa, 1963b: 154. Kurosawa, 1974a: 2. Peng Zhongliang, 1987: 354. Jendek, 2000: 502. Hua Li Zhong, 2002: 89. Mühle, 2003: 46. Jendek, 2005: 3–4. Jendek, 2006: 396.

= horni Kerremans, 1914: 104 –105 [ Sambus].

Jendek, 2000: 502 [synonym of acastus]. Jendek, 2006: 396 [synonym of acastus].

= ohbayashii Tôyama, 1987: 308 .

Hua Li Zhong, 2002: 90. Jendek, 2005: 3–4 [synonym of acastus]. Jendek, 2006: 396 [synonym of acastus].

Diagnosis. This species is distinctive by the large extent of white elytral pubescence (Fig. 13) and mainly by the robust, apically expanded aedeagus (Fig. 65).

Length. 4.0– 4.6 mm.

Type series. Agrilus acastus Kerremans, 1913 . Lectotype, designated by Jendek (2000): Ƥ, DEI: “ Kankau (Formosa) H. Sauter VII. [number strikethrough] 1912 [p] \ 7.IV. [p] \ Syntypus [p] [red label] \ Kerremanns [sic!] det. [p] \ Agrilus acastus Kerr. Type [h] [Kerremans' MS] \ Coll. DEI Eberswalde [p]”. The exact number of syntypes is unknown. Type locality. Formosa, Kankau.

Sambus horni Kerremans, 1914 . Lectotype, designated by Jendek (2000): 3, DEI: “ Kankau (Koshun) Formosa H. Sauter V.1912 [p] \ Syntypus [p] [red label] \ Kerremanns [sic!] det. [p] \ Sambus Horni Kerr. Type [h] [Kerremans' MS] \ Coll. DEI Eberswalde [p]”. The exact number of syntypes is unknown. Type locality. Formosa, Kankau: Koshun.

Agrilus ohbayashii Tôyama, 1987 . Holotype: 3, NSMT: “ Sengpei Formosa 30. VII. 1976 K. Matsuda [h] [blue label] \ HOLOTYPE [p] Agrilus ohbayashii Tôyama, 1986 [h] [red label]”. Described from 7 specimens. Type locality. Formosa Sengpei [Note: Type locality determined by lectotype (ICZN, Article 76.2.)]. Original published locality: Taiwan, Kaohsiung Hsien, Shanping near Liukuei.

Remarks. Kurosawa (1963a) described two subspecies: A. acastus tsushimanus and A. acastus nakanei, which are currently considered to be different species not belonging to the A. muscarius species-group. The name horni Kerremans, 1914 is a junior secondary homonym of horni Kerremans, 1900 (Agrilus) and horni Théry, 1904 (Agrilus) .

Specimens examined. This species is known to us only from the type specimens.

Distribution. Taiwan.