cate. In lateral view with flat, f;entle forward slope. 

 Th4 and Th5 separate; Th5 lateral corners slightly 

 prolonged; Thl-Th4 without lateral spinules. 

 Prosome length about Sya times urosome. Genital seg- 

 ment as long as wide, protruding ventrally one-third 

 depth of rest of urosome. Caudal rami as long as wide, 

 left ramus slightly larger than right. Left terminal sec- 

 ond from inner seta thickest, length ca. 2.1 mm; left 

 and right terminal second from outer seta relatively 

 thick to near tip; right inner seta larger than left, with 

 long plumes. 



Al exceeding caudal rami by about 4 segments; ter- 

 minal segments (Fig. 155) elongate. Apparent 

 deviation: I-ls; remainder as Table 4. 



A2 Rel with 1 seta. 



Mn palp with inner row of long setules on distal 

 anterior surface of B2 and on surface of Ril. Blade 

 (Fig. 100) with 5 outer subequal teeth, ventral tooth 1- 

 pointed. others at least 2-pointed; 3 narrow teeth, 

 followed by outer seta, dorsally; proximal anterior 

 surface with clusters of stiff hairs. 



Mxl gnathobase with 4 proximal setae on posterior 

 surface, without seta on distal anterior surface. 



Mx2 with setule-covered proximal hump and outer 

 seta; posterior surface of lobe-5 base without spines. 



Mxp (Fig. 105) Bl with 3 transverse spine-combs on 

 distal outer surface; proximal transverse row and dis- 

 tal oblique row of setules on anterior surface; inner 

 distal hump with row of denticles. B2 with strong 

 transverse spine-comb about one-third length on out- 

 er surface; inner longitudinal row of stiff hairs. Ril 

 with distal row of stiff hairs; Ri3 with only 2 setae; Ri5 

 with inner spinules. Ri4-5 outer setae nude, bladelike, 

 tapering toward each end. 



PI (Fig. 101) Bl-2 anterior surface with few rows of 

 setules; inner margin with hairs. Rel-2 anterior sur- 

 face with outer distal row of spinules; Re3 surface 

 nude. Rel-2 outer spines barely reaching bases of 

 following spines. Ri distal anterior surface with few 

 short setules. 



P2 (Fig. 102) Bl outer surface with few spinules and 

 setules, inner margin with hairs; B2 nude. P3 (Fig. 



103) Bl outer surface with few spines, spinules, and 

 setules, inner margin with hairs; B2 nude. P4 (Fig. 



104) Bl proximal inner posterior surface with row of 

 long and short setules; inner margin without hairs; B2 

 nude. 



P3-P4 Re2 posterior surface with proximal row of 

 large, fairly wide spines and distal row of smaller 

 spines. 



P2 Re3 rarely with few small proximal spines, 

 usually only with 2 distal rows of spines. P3-P4 Re3 

 with 3 evenly spaced rows of spines, spine-size 

 decreasing distally. 



Re terminal seta with following number of primary 

 teeth: P2 (37-44); P3 (38-49); P4 (40-44). 



Male.— Length 1.4-1.76 mm (Figs. 106, 107). 

 Prosome anterior irregular in dorsal view, posterior 



somewhat rectangular; in lateral view with gentle 

 forward slope. Ce and Thl partly fused. Prosome 

 length 2 '2 times urosome. Caudal rami about as long 

 as wide, symmetrical. Caudal setae symmetrical. 



Al reaching distal edge of urosome segment 1; seg- 

 ment 1 without cluster of spinules on anterodorsal 

 surface. IV-2s, 2e; VIII-2s, 2e; XV-2s, le; XIX-2s, 

 le; right XX-0; left XX- le; remainder as Table 4. 



A2 Rel with reduced seta. 



Mn blade and Mxl gnathobase reduced. Mx2 with 

 fragile outer seta; setae of reduced length, terminal 

 setae thicker than on female; lobe surfaces nude. 



Mxp (Fig. 108) Bl setae of reduced length, surfaces 

 nude. B2 with longitudinal row of long stiff hairs. 

 Longest setae of Ri2-5 nude, not inflated; Ri4-5 outer 

 setae reduced, nude; no spinules on inner Ri5. Ri3 

 with 3 setae. 



PI (Fig. 109) Bl-2 with fewer outer setules on 

 anterior surface than on female; Rel -3 and Ri surface 

 nude. Rel outer spine reaching about one-half length 

 of Re2. Re2 outer spine stronger than on female. 



P2 (Fig. 110) Re2 with cluster, not row, of ca. 9 

 spines on posterior surface. Re2-3 outer spines longer 

 than on female, reaching to base of following spines. 

 Spiniform terminal edge of Re3 longer than on female. 



P3 (Fig. HI) Re2 posterior surface proximal spines 

 wider than on female; distal spines in cluster. Re3 

 similar to P2 Re3. 



P4 Bl-2 nude. Rel and Ri as on female. Re2-3 miss- 

 ing on specimens examined. 



Re terminal seta with finer serrations than on 

 female: P2 (63-70); P3 (ca. 64). 



P5 (Fig. 112) biramus, left-handed; reaching to end 

 of urosome segment 2. Left Bl reaching middle of 

 right B2; left B2 reaching one-third length of right 

 Rel. Left and right legs about equal. Right Re, in- 

 cluding long terminal blade, slightly longer than left; 

 right Ri much longer than left. Order of length, 

 longest to shortest, of Re segments: left and right 1 = 

 2, 3. Left Ri reaching two-thirds length of left Re2. 

 Right Ri reaching two-thirds length of longest right Re 

 terminal blade. Each Rel with short seta on outer dis- 

 tal edge. Inner edge of left Re2-3 with long hairs. Each 

 Re with 1 small and 1 moderate bladelike terminal 

 setae. 



Male stage V.— Length 1.48-1.53 mm. P5 (Fig. 

 113) biramus, symmetrical. Re imperfectly 2- 

 segmented; outer distal edge of Rel with short, flat 

 seta; 2 short, unequally wide, terminal setae. Ri with 

 trace of segmentation; terminal seta reaches nearly to 

 end of Re. 



Remarks 



In addition to the female of S. elongatus, Brodsky 

 ( 1950) described two distinct males under the name S. 

 elongatus. The "typical" male is S. polaris (see 

 below); the "variant" male is S. elongatus. 



49 



