NEW XYSTODESMID MILLIPEDS — HOFFMAN 383 



Reniarks. — Although not confined to ericaceous habitats, this species 

 is certainly most abundant in such places, and is found elsewhere 

 only rarely. Certain other members of this genus share the predi- 

 lection for ericaceous thickets (e. g., N. loUsoni^ see below) . 



Judged from the nature of the gonopods, Nannaria ericacea finds 

 its closest relatives in N. scutellaina Causey and N. tennesseensis 

 (Bollman). 



In addition to the type locality, I have found this species at the 

 following Virginia localities: Craig County: Barbours Creek, 9 miles 

 northwest of Newcastle ; Botetourt County: Craig Creek Valley, 2 miles 

 northwest of Eagle Rock. The range is doubtless general over cen- 

 tral western Virginia. 



NANNARIA LAMINATA, new species 



Plate 27, Figukes 11, 12 



Diagnosis. — A medium-sized member of the genus, characterized by 

 the structure of the male gonopods, in which the telopodite consists 

 of two subequal processes, the lateral process being slender, spini- 

 form, and with the distal portion curved mesially over the end of the 

 broad, flat mesial process. 



Description. — Length of holotype, 27, width, 5 mm. Width of body 

 about 18 percent of length. Segments between second and fifteenth 

 of full width, body abruptly rounded in front, gently tapering behind. 



Collum large, subtrapezoidal in dorsal aspect, sides straight and 

 with conspicuous marginal ridges, front slightly rounded. Posterior 

 margin interrupted (emarginate across body) ; posterior corners an- 

 gular. Collum as long as succeeding two segments combined. 



Second segment with keels shorter than tergite at midline, poste- 

 rior edges of keels tapering cephalad, keels with well-developed mar- 

 ginal ridges. Segments 3 through 12 subsimilar, anterior corners of 

 keels rounded, posterior corners directed slightly caudad; all keels 

 with prominent marginal ridges; keels extending caudad of median 

 posterior portion of tergites. Segments 14 to 19 with posterior lobes 

 shorter than tergite at midline. All tergites comparatively flat and 

 very smooth. Repugnatorial pores lateral in position, in some in- 

 stances directed slightly downward. 



Anal segment triangular in dorsal aspect, as long as broad, its basal 

 width greater than distance between keels of the nineteenth segment, 

 truncate distally, the tip somewhat excavated. Anal valves inflated, 

 glabrous, with ridges and grooves on the cephaloventral portion of 

 each. Preanal scale semicircular, with tubercules almost obsolete. 



Bases of last pair of legs narrowly separated. Legs of segments 8 

 to 18 subsimilar ; sternites of posterior pair of legs of each with robust 

 spines, coxae and trochanters unarmed, femoral spines large; distal 



