seta slightly thinner. Palpifer chestnut brown; distal seta small, strong, 

 reddish brown, situated on membrane; basal seta small, light. Palp short, 

 segments with chestnut brown sclerites; distal segment slightly smaller 

 and lighter than the preceding segments. Mentum dark reddish brown in middle, 

 black laterally, with a median process at posterioi- margin; ventral sclerites 

 large, in form of brown plates; seta very small, light; palpiger brown, 

 horseshoe-shaped; labial palps small, with yellowish brown sclerite. 



Pronotum (Figu)-e 636, D) mainly light chestnut brown, yellowish laterally; 

 transverse ridge, characteristic for the family, represented by a thin, dark 

 brown stripe; posterior' part with 5—6 large light dots, and 2—3 indistinct 

 dots, behind ridge; anterior margin narrow, brown; posterior margin mainly 

 yellowish, narrow in middle, markedly wider laterally, separated anterioi-ly 

 by a narrow, reddish sti-ipe and posteriorly by a brownish mai'gin, indistinct 

 ,383 laterally; lateral margin short, with a dark reddish brown stripe. Anterior 

 and anterior pai't of lateral margin with a row of 9—10 brown setae, median 

 setae shoi-t, setae at anterior angle longer, strong, 2 shorter and thinner 

 setae laterally. Medioanal seta situated in middle of ridge, reddish bi-own, 

 strong", modei-ately long; 3 setae situated laterally at end of ridge, one short, 

 other 2 longer, all 3 light; further laterally a number of reddish brown setae, 

 one mioderately long, other 3 short, closer to posterior margin. 



Mesonotum (Figui-e 637, A) chestnut brown, lighter laterally; median 

 tergites anteriorly with 4—6 large, lateral dots, with several smaller dots; 

 posteriorly at median sutui-e and in each half; lateral tergites with flat 

 median part and lighter lateral part divided by a longitudinal, oblique, 

 narrow, reddish stripe. Setae dark chestnut brown; anterior margin of 



FIGURE 637. Oligoplectrodes potanini Mart. Dorsal and pleural 

 sclerites of mesothorax (A) and metathorax (B) 



480 



