Mesonotum (Figure 442, B) lighter than pronotum; anterior part with 

 narrow, dark, median area, posterior part with a wider, dark, median 

 area; anterior angle with a darker area in punctate region; posterior angle 

 light with reddish brown streaks; anterior margin with a short, dark band 

 in middle; posterior margin light brown in middle, lighter elsewhere, 

 posterior angle and greater part of lateral margin broad, black, narrower 

 anteriorly. 



Tergites of metathorax slightly brownish; anterior pair situated close 

 together; setae short and small, anterior and posterior tergites with 7—8 

 and 6 — 7 secondary setae in addition to primary setae; lateral tergites 

 large, with reddish brown striation and a large dot in middle, posterior 

 part with pale punctation, anterior part with 10—11 secondary setae, in 

 addition to a moderately long, anterior-angle, primary seta. Metanotum 

 „^„ with small setae between sclerites, especially posteriorly. 



Prosternite (Figure 443) trapezoidal, light brownish, with a small, 

 narrow, reddish stripe posteriorly, with groups of indistinct dots laterally. 

 Mesosternites represented by 2 rows of pinkish dots forming a wedge- 

 shaped pattern. Metasternites with similarly arranged white dots. 



Legs (Figure 444) brown, darker than thoracic tergites; coxae and 

 femora with dark dots, trochanters and tibiae less distinctly punctate. 

 Secondary setae present only on coxae and femora; femora with only a 

 few secondary setae on dorsal side. Primary ventral setae of fore femur 

 in form of 2 light spines, both pointed, apical seta as long as posterior 

 seta, the latter short, dark, situated in middle between basal spine and 

 margin. Primary ventral setae of mid-femur brown, spine-shaped, basal 

 spine slightly smaller; posterior distoventral setae of mid-trochanter 

 almost the same but slightly larger and lighter. Ventral seta of hind femur 

 represented by similar spines situated close together in middle, basal spine 

 smaller; posterior seta situated in distal part; posterior distoventral seta 

 of hind trochanter long. 



Abdominal segment 1 without dorsal process; lateral processes normally 

 developed; dorsum of segment strongly convex, with numerous small, black, 

 secondary setae situated, as are primary setae, on small sclerotized dots; 

 ventral surface also convex, with 2 small, dark sclerites, and with setae 

 on entire surface on sclerites and sclerotized dots. 



Lateral line on segments 2 — 8; hairs small, brownish. 



Gills single, on segments 2 — 7. 



Ventral side of segments 2 — 7 with elliptical, transverse, smooth areas 

 of thin integument. 

 „(- . Tergite of segment 9 (Figure 445) brown, with 2 rows of dots at anterior 

 margin; setae black; medioanal and anterior-margin setae thick, of almost 

 equal length, the former slightly larger; intermediate seta thin, very long, 

 lateral seta short; 2 large, moderately long, secondary setae between 

 medioanal setae; other secondary setae, margin and surface setae number- 

 ing 17 — 19,* in contrast to Limnophilus, and differing in size from 

 small to long. 



Sclerite "b" of anal legs brownish; distodorsal setae about equally spaced, 

 long, lateral seta smaller than other 2, median seta larger, ventral seta 

 short, dark; a long, black seta resembling median distal seta, and a short, 

 thin seta at ventral margin; surface with 7—8 setae. Sclerite "c" yellowish 



• They are more numerous according to Siltala (1907; 510). 



318 



