Macrosiagon gabonica Pic 1950

Macrosiagon gabonicum Pic, 1950a: 12 (type locality: ‘Gabon’).

Macrosiagon senegalense Pic, 1951d: 207 (type locality: ‘ Sénégal: M’Bambey’), syn. nov.

Type material examined. Macrosiagon gabonicum. SYNTYPE: 1 J (MNHN – coll. Pic, box no. 6), ‘ Gabon [Pic’s hw] // type [Pic’s hw, orange label] // type [p, red label] // gabonicum / n. sp. [Pic’s hw]’.

Macrosiagon senegalense. SYNTYPE: 1J (MNHN – coll.Pic, box no. 9), ‘Bambey / Senegal / T. Risbec [hw] // désiré [Pic’s hw] // Macrosiagon / senegalense / n. sp. [Pic’s hw] // type [p, red label]’.

Additional material examined. SUDAN: BLUE NILE: 1 J (BMNH), ‘SUDAN: / Wad Medani. / viii 1930. / H. B.

Johnston [p]’.

Remarks. Black species, except yellow antennae and primarily yellow elytra, which are black basally and apically; pronotal disc without an elevated process at the apex of the medial lobe, roughly and densely punctured, MT 2 shortened and flattened dorsally. This species is similar in coloration to the single known male-specimen of M. elegans (Marseul, 1876) from the Arabian Peninsula (BATELKA 2010) from which it differs mainly by the shape of MT 2 and by absence of the elevated process at the apex of pronotal disc. Only males are known. More material of both sexes is needed to prove validity of the species.

According to the original description the ‘type’ of Macrosiagon senegalense should be deposited in ‘IFAN’ but it is actually deposited in MNHN.

Types of Macrosiagon gabonicum and M. senegalense are identical and both species are therefore synonymised.

Distribution. Afrotropical species. Described from Gabon and Senegal. It is recorded here from Sudan for the first time.