Pronotum (Figure 331 ) light, yellowish brown in middle, anterior third 

 uniformly dark brown, with a darker, blackish brown stripe in middle of 

 groove; posterior-margin area also dark; anterior and lateral margin 

 narrow, dark reddish brown; posterior margin wide, with 2 separate, 

 black stripes; posterior-angle process with 2 dots, and narrow, brownish, 

 lateral margin; setae black and blackish brown. 



Mesonotum brown, darker in middle of anterior part and at posterior 

 angle, with a dark stripe laterally at anterior margin; posterior margin 

 blackish brown, narrow; lateral margin with short, broad part posteriorly; 

 striation of posterior angle narrow, reddish brown; medioanal seta black, 

 thick, markedly longer than others. 



Tergites of metathorax distinct, chestnut brown; anterior median tergites 

 pale, primary seta long, 5—6 small, secondary setae; posterior median 

 tergites with long medioanal seta, the other 4—5 setae of different size; 

 lateral tergites with a transverse row of 3 large, dark reddish brown dots, 

 primary seta long, situated in anterior part, 12 — 14 secondary setae of 

 different size. 



Prosternite with yellowish median area, with large dark dots posteriorly, 

 several, pale sclerotized dots laterally. Mesosternites represented by a 



:i97) 



FIGURES 332-335. Limnophilus ni gr i c e p s Zett.: 



332 - thoracic horn and sternites; 333 - right trochanter and femur 

 of foreleg (A),midleg (B),and hind leg (C), posterior; 334 - larval 

 case; 335 - sheath of ventral appendages and penis of male pupa 

 (335 - after Siltala). 



246 



