REVISION OF BORARIA AND GYALOSTETHUS — HOFFMAN 319 



cephalolateral marginal ridge distinct nearly to middle of collum, 

 set off by a prominent, broad, submarginal depression. 



Body segments smooth, evenly convex and flat, the prozonites 

 and metazonites approximately equal in length, and meeting dorsally 

 at a fine sutural line, forming the anterior edge of the interzonal 

 fmTow; latter distinct and sharply defined across dorsum of anterior 

 segments, becoming broader and less well defined on posterior seg- 

 ments. Metatergites of anterior segments smooth, those of midbody 

 and posterior segments becoming increasingly tuberculate, those of 

 segments 14-18 with about 3 to 5 transverse rows each of 16-18 small 

 but distinct setiferous tubercules visible to the unaided eye. Par- 

 anota smaller than average for xystodesmids, set high on segments 

 and only slightly depressed, thus scarcely interrupting slope of 

 middorsum. Paranota of anteriormost segments bent forward, over- 

 lapping, with both lateral corners rounded, the anterior and lateral 

 edges set off by a prominent submarginal depression. Paranota of 

 midbody segments not overlapping, the caudal corners rectangular; 

 those of segments 11-19 vnth the caudal corners caudally produced, 

 the anterior corners rounded. Scapulorae entirely marginal; peri- 

 tremata flat but prominent; ozopores rather large and located in 

 conspicuous dorsolateral peritrematic depressions (fig. 1), posterior 

 edge of all paranota essentially straight, without basal lobe. Para- 

 nota of segment 19 small, rounded lobes; epiproct small, partially 

 retracted, dorsally convex, without special modification. 



Paraprocts glabrous, smooth, nearly flat, with prominent elevated 

 median edges, the ventral seta set on a tiny tubercule slightly re- 

 moved from the rim, the dorsal seta set on an enlargement of the rim 

 near its dorsal end. Hypoproct large, smooth, flat, semicircular 

 in outline, without distinct median apical projection; paramedian 

 tubercules small, removed from the edge; the setae very long. 



Ventral surface of prozonites smooth and polished, set off from 

 metazonites by a shallow, sinuous interzonal furrow. Legs set on 

 subcoxal elevations which form a low but well-defined glabrous 

 podosternum; no subcoxal spines developed. Sterna of midbody 

 segments 1.2 mm. in width, the legs of both pairs about equally 

 separated. 



Legs relatively long and slender, the distalmost 4 podomeres 

 visible beyond paranota when extended laterad; coxae much shorter 

 than prefemora and without trace of distal spine, prefemoral spine 

 very short and acute, both of these leg segments with 2 or 3 large 

 ventral setae; femora longer, clavate; postfemora and tibiae short, 

 as broad as long; tarsi longer, set with numerous erect setae; pretarsi 



