lai-ger and slightly curved; a row of blunts light gi-ayish spines ari-anged in 

 gi'oups of 4—7, sometimes 9 — 10, at ventral margin; space between groups 

 occupied, as in B. s u b nu b i 1 u s, by small, thin, light, secondary setae. 



Tibia dorsally with 2 paij-s of primary setae; pi'imary distoventi-al seta 

 situated on process, in form of a lai-ge, thick, yellowish spine; 2nd ventral 

 seta shorter, straight, light, situated basally; a row of spinules between 

 setae. Tarsus with small, distinct distoventral process, in contrast to 

 Oligoplectrodes; pi-imary dorsal setae situated one behind the other, 

 short; postei-ior distoventral seta in form of light spine on process, 

 anterior distoventral seta similai-, slightly smallei-, situated basal to row of 

 spinules. Claw long, as long as tarsus, basal seta in foi-m of a small, light 

 spine (Figui-e 645, B). 



Hind coxa basally with a posterior row of 2 large, hook- shaped spines 

 and one small spine; anterior dorsal processes absent; chaetotaxy of 

 trochanter, femur, tibia, and tarsus as in Figure 644, C. 



Abdominal segment 1 without dorsal or lateral processes; lateral line 

 poorly mai-ked;from segments 3 — 7 haii-s irregularly distributed, mainly 

 in posterior part of segments. Gills only on dorsal side, postsegmental 

 (almost intersegmental) from postei-ior margin of segment 2 to posterior 

 margin of segment 7, with 2—7 short filaments (according to Nielsen). 



Tergite of abdominal segment 9 small, brownish, with 1—3 secondary 

 setae at posterior margin on each side, in addition to 4 priraary setae; 

 medioanal setae and anterior-angle setae longer than others. 



(392; 



6^6 



6^7 



FIGURES 646 and 647. Oligoplectrum maculatum Fourc. 

 Cafter Nielsen): 



646 — left anal leg and adjacent part of segment 9, ventral (A), 

 claw of right anal leg, lateral (15), and inner side (C); 647 — anterior 

 part of larval case, ventral (A) and lateral (B). 



490 



