Notes on a small collection of Prioninae from North-East Madagascar with the description of a new Schizodontus/ Quentin amp; Villiers, 1974 (Cerambycidae, Closterini).

We present observations from a small collection of longhorns belonging to the subfamily Prioninae and collected during an expedition in the rainy season to a newly designated protected area, Mahimborondro, in North-East Madagascar. The material includes a new species (S. mahimborondroensis sp. nov.) of Closterini (Prioninae) from a small genus with only two described species (Schizodontus angustus Quentin Villiers, 1974 and S. latus Quentin Villiers, 1974). An identification key to the three species is included.

On the type depository of some species of Cerambycidae (Coleoptera), especially of the holotype of Quercivir dohrni Lameere, 1912.

Correction on the type depositories of some species of Cerambycidae, often reported as being in Museum of Stettin, Stettin, Poland (CMSP), are reported. The holotype of Quercivir dohrni Lameere, 1912 was located, and comments on it are provided. A forgotten correction on the type locality of Sypilus venturae Dohrn, 1882 is presented. Prionapterus staphilinus schaeferi Bosq, 1947 is transferred from synonymy with P. woltersi Bruch, 1925 to synonymy with P. staphilinus Guérin-Méneville, 1831. Sphecogaster biplagiatus Lacordaire, 1868 is formally synonymized with Sphecomorpha chalybea Newman, 1838, and notes on the holotype of Physopleurus dohrnii Lacordaire, 1869 are provided. Additionally, photographs of some Cerambycidae deposited in the Deutsches Entomologisches Institut, Müncheberg, Germany (DEIC) collection are provided.