On Five New North American Millipeds and Records of Some Established Species

Abstract

Figs. 1-4 Closely related to E. amphelictus (Chamberlin, 1918), but easily distinguished from that species by the fact that the accessory blade of the posterior gonopods of the male is simple rather than bifid. Male holotype.-Dorsum brown; head, venter, and base of legs light brown; antennae and distal half of legs dark brown; dark brown band between eyes. Collum roughly quadrate, lateral margins with one entire sulcus. Ventro-cephalic angle of outer tooth of mandibles produced cephalad as is usual in the aniulus group of the family. Eyes subtriangular, 8 rows of ocelli, 11 to 5 in each row, the dorsal row amber colored and the others black. Sternite of eighth segment produced forward in a sharp keel (Figt. 1) which covers the base of the posterior gonopods. Anal spine sharp, curved slightly ventrad, extending as far beyond the anal valves as the setae on the valves. Femoral lobe of anterior gonopods clavate, apparently thicker than in amphelictus; with the usual setae. Coxal lobe elongate, with 4 longitudinal ridges, widest beyond the middle of its length, then decreasing to a blunt end; it curves caudad to about the middle of the eighth segment, then ventrad, and finally cephalad, almost making a semicircle (Fig. 2). Each posterior gonopod consists of an elongate seminal blade and a shorter accessory blade (Figs. 2, 4). The seminal blade curves cephalad, then ventrad, and finally dorsad, with the end coming to rest between the coxal lobes of the anterior gonopods. The two seminal blades are contiguous medially near the ends; the ends turn slightly laterad. The accessory blade, which arises on the lateral surface of the posterior gonopod, is simple, twisted about 900, and slightly curved. Width 2.6 mm., 57 segments. Locality.-Ruston, Lincoln Parish, Louisiana. Collected in April, 1951, by Walter J. Harmon. Genus OKLIULUS Causey