divided; posterior margin of epimeron almost parallel to the pleural suture; 

 both setae of the pleuron of the meso- and metathorax of almost equal length 

 (Figure 465). 



The median anterior sternite of the segments is absent; the lateral 

 posterior sternites form narrow transverse plates; these plates are fused 

 in the middle on the prothorax; they have a narrow median stripe of 

 thickened integument on meso- and metathorax. 



[356) 



FIGURES 465-469. Ortho trichia tet ensii Kolbe (after Nielsen): 



465 — thoracic segments, lateral; 466 — pleuron of prothorax; 467 — right legs, posterior: 

 foreleg (A), midleg (B), hind leg (O; 468 —abdominal segments 8 and 9 and anal 

 legs, right side; 469 — claw of right anal leg, outer view (A) and inner view (B). 



Legs (Figure 467) less sharply differentiated than in other genera. 

 Basal process of femur and apical process of fore tibia hardly marked. 

 Setae of the legs mainly light. Basal seta of coxa of forelegs forming a 

 large strong spine; anterior distodorsal seta thin; posterodorsal seta long 



395 



