THE MILLIPEDE ORDER CALLIPODIDA IN WESTERN NORTH-AMERICA (SCHIZOPETALIDAE, TYNOMMATINAE), AND A SUMMARY OF THE NEW-WORLD FAUNA

In western North America, the milliped order Callipodida is represente d by the Colactidini, Tynommatini stat. n., and Diactidini tribus n., in the subfamily Tynommatinae, family Schizopetalidae; a coordinate tr ibe, the Texophonini, occurs on the Gulf Coast of south Texas. The Tyn ommatini consists of two genera and four species: Tynomma mutans (Cham berlin), T. magnum Buckett & Gardner, and T. gardneri sp. n., occurrin g around Monterey and San Pablo/San Francisco Bays, California, and Id rionaria dineh gen. n. & sp. n., in Washington County, Utah. The Colac tidini ranges from Durango, Mexico, to central Utah and California eas t of the Sierra Nevada, with disjunct areas in southern California and Baja California, the latter extending northward to metropolitan San D iego. It is represented by two genera and 6 species: Colactis Loomis: C. tiburona (Chamberlin), utorum (Chamberlin), and protenta and quadra ta, both by Loomis; and Heptium Loomis: H. carinellum and scamillatum, both by Loomis. The Diactidini, occupying coastal southern California and the adjacent fringe of Baja California, is comprised of three gen era and 10 species: Diactis Loomis: D. soleata, triangula, and frondif era, all by Loomis, and amniscela, cupola, jacinto, procera, and strum ella, all spp. n.; Florea sinuata gen. n. & sp. n.; and Caliactis bist olata gen. n. & sp. n. The following new synonymies are proposed: C. y uma Chamberlin, sideralis Loomis, and loomisi Hoffman under C. tiburon a; C. briggsi Shear and saxetana and baboquivari, both by Loomis, unde r C. utorum; H. canum Chamberlin under H. carinellum; and Etiron paroi cum and pearcei, both by Chamberlin, under D. triangula and T. mutans, respectively. The eastern Nearctic callipodid fauna is summarized and significant new localities are reported; Tetracion antraeum Hoffman, stat. n., is elevated from a subspecies of T. jonesi Hoffman.