An annotated list of the millipede (Diplopoda) species described by Johann Carl Author Hollier, John Muséum d’histoire naturelle, C. P. 6434, CH- 1211 Genève 6, Switzerland. E-mail: john. hollier @ ville-ge. ch john.hollier@ville-ge.ch Author Stöckli, Eduard Naturhistorisches Museum Basel, Augustinergasse 2, CH- 4051 Basel, Switzerland. E-mail: eduard. stoeckli @ bs. ch eduard.stoeckli@bs.ch Author Wesener, Thomas Zoologisches Forschungsmuseum Alexander Koenig, Leibniz Institute for Animal Biodiversity, Adenauerallee 160, D- 53113 Bonn, Germany. E-mail: T. Wesener @ leibniz-zfmk. de esener@leibniz-zfmk.de Author Mesibov, Robert West Ulverstone, Tasmania, Australia 7315. E-mail: robert. mesibov @ gmail. com robert.mesibov@gmail.com Author Decker, Peter Senckenberg Museum für Naturkunde Görlitz, Department of Soil Zoology, Am Museum 1, D- 02826 Görlitz, Germany. E-mail: peter. decker @ senckenberg. de peter.decker@senckenberg.de Author Sierwald, Petra Field Museum of Natural History, 1400 S. Lake Shore Drive, Chicago, IL 60605, USA. E-mail: psierwald @ fmnh. org psierwald@fmnh.org text Revue suisse de Zoologie 2020 2020-06-04 127 1 183 240 http://dx.doi.org/10.35929/rsz.0015 journal article 10.35929/RSZ.0015 0035-418 5743454 vagans Carl, 1941b: 589-592 , figs 24-35 [ Diopsiulus ( Plusiochaeturus ) ]. Nilgiris: Alter Weg unterhalb Coonoor, ca. 1500 m und im Erdmulm des Urwalds, unter dicker Laubdecke, XII.1926 und I.1927 . Unspecified number of ♂ and ♀ . The MHNG collection contains 14 specimens in alcohol in four vials. The first vial (MHNG-ARTO-14478) contains two specimens and a label with “ Diopsiulus vagans Carl ♂♂ Coonoor 4.I.27 ” written on it. The second vial (MHNG-ARTO-14479) contains three specimens , two of them broken into several pieces, and labels with “Alter Nilgiris ca. 3 Meilen unterhalb Coonoor 4.I.27 ”, “ Diopsiulus vagans Carl Coonoor ” and “Alter Nilgiris Coonoor 4.I Präp Diopsiulus II ” written on them respectively. The third vial (MHNG- ARTO-14480) contains six specimens and labels with “Diopsiulis vagans Carl, Coonoor , 2♂♂ , 1♀ , juv.” and “ Stemmiulidae ! ♂ ♀ juv. Coonoor 24-29.XII. Unter dicker Laubdecke, in Erdmulden des Waldes, feucht & schlaffig” written on them respectively. The fourth vial (MHNG-ARTO-14481) contains three broken specimens and a label with “ Diopsiulus vagans Carl 3♀♀ Coonoor, 4.I.27 ” written on it. All of these specimens are syntypes . There are three microscope slide preparations, one labelled “ Diopsiulus II vagans Carl Coonoor ” and the others “Diosiulus II ”, one of which has locality data. 1) a slide (MHNG-ARTO-14482) with gonopods, legs 1, 2, 3 and 9 and antennae; 2) a slide (MHNG-ARTO-14483) with gonopods, legs 1 and 2 and hypostoma; 3) a slide (MHNG-ARTO-14484) with legs 1, 2 and 3 and the hypostoma of a ♀ . Stemmiulus vagans (Carl, 1941) , Stemmiulidae