The millipede family Striariidae Bollman, 1893: III. Four new species of Striaria Bollman, 1888 (Diplopoda, Chordeumatida, Striariidae) from Idaho, USA Author Shear, William A. 0000-0002-5887-7003 Professor Emeritus, Department of Biology, Hampden-Sydney College, Hampden-Sydney VA 23943 USA; current address: 1950 Price Drive, Farmville VA 23901 USA. wshear @ hsc. edu; https: // orcid. org / 0000 - 0002 - 5887 - 7003 wshear@hsc.edu text Zootaxa 2021 2021-01-29 4920 3 395 406 journal article 8331 10.11646/zootaxa.4920.3.5 91354319-27a8-4bdb-86af-857c5affbe76 1175-5326 4478139 AC8D95DF-5BCB-49C9-864E-60CFA8AB613B Striaria orator , n. sp. Figs 19–21 , 33–36 Types: Male holotype and female paratype from Banks Gulch, 4 mi north, 8 mi east of Harvard , 46.9818°, - 116.5607°, 2905’ ( 890 m ) asl, Latah Co. , Idaho , collected 10 September 1978 by A. K. Johnson , deposited in the California Academy of Sciences. Parts of the holotype are mounted on SEM stub WS34-6, deposited with the specimens . Etymology: The species epithet, a noun in apposition, honors Orator F. Cook (1867–1949), a botanist specializing in cotton, rubber trees and palms who also laid a sound foundation for the study of North American millipedes, establishing many families and genera still valid today. Diagnosis: Distinct from the foregoing species from Idaho in lacking any spinules or teeth on the apex of the anterior angiocoxite of the gonopod. Description: Male holotype . Length, about 10 mm , width about 1.0 mm. Body form and secondary sexual modifications typical of genus, as described above for S. aculeata . Third legpair coxae with long flasks ( cf , Fig. 19 ), postcoxal bars of pleurotergite 3 overlapping, broad ( pcb , Fig. 19 ). legpair 3 telopodites robust, prefemora thickly swollen ( pf3 , Fig. 19 ). Gonopod ( Figs 20, 21 , 33–36 ) anterior angiocoxites hardly bent at all at “kink” but with very prominent transverse ridge, at least five distinct rugae, lateral subterminal spine shorter than in S. vagabundus , mesal tip of anterior angiocoxite not projecting but laterally hammer-shaped. Posterior angiocoxites with two blunt terminal processes, three or four narrower processes, short posterior hook, sheathing four flagellocoxites. Female paratype : Similar to male but without secondary sexual modifications. Distribution: Known only from the type locality.