206 



to it, last tooth indistinct; right mandible with 5 teeth, subventral tooth 

 large, 3 small, blunt teeth dorsal to it, and one ventral to it; lateral setae 

 thin, situated near base, dorsal seta darker and larger than short, light, 

 ventral seta. 



Pronotum yellowish; groove in anterior third of tergite brown in the 

 middle, anterior margin brownish, lateral margin light; posterior margin 

 wide, with clearly divided, transverse, black stripes. 



Mesonotum brownish in middle and at posterior margin; posterior margin 

 loniformly black; posterior angle large. 



Tergites of metathorax indistinct; lateral tergite wide, pale, with a 

 transverse row of several pinkish brown lines and dots; anterior-angle 

 seta and 3—4 secondary setae black, long, other 7—8 setae thinner and 

 Sinaller. 



Prosternite (Figure 354) in form of a yellowish, posteriorly brownish, 

 median sclerite and dense groups of pinkish brown dots lateral to it. 

 Horn brownish, with light apex. Mesosternites represented by a row of 

 pinkish dots; ventral side of metathorax with similar, but white dots. 



Number and arrangement of gills of L.bipunctatus 



Segment 



Dorsal 



Pleural 



Ventral 



2 



3 

 3 



3 



3 

 3 



3 

 3 



3 



3 

 3 



3 



2 



3 

 3 



4 



3 



3-2 



2 



1 



3 

 3 



5 



2 

 2 







2 



2 



6 



2 

 2 







2 

 2 



7 



2 







2 

 1 



Coxae and trochanters brown, femora and tibiae yellowish. Trochanters, 

 femora, and tibiae with large, dots; basal segment of trochanter of all 

 legs with several, secondary, ventral setae (Figure 355); distal part of 

 mid- and hind trochanter with a few thin, secondary setae posteriorly. 

 Primary ventral setae of fore femur in form of a short, light, basal 

 spine and a slightly larger apical spine; posterior seta blackish brown, 

 situated near basal spine, in contrast to L. rhomb icus, sometimes 

 slightly more basally; primary apical ventral seta of mid -femur 

 represented by a large, light spine; basal seta black, moderately long; 

 basal seta of hind femur spine-shaped, apical seta black, moderately long. 



Gills on segments 2—7. 



Tergite of abdominal segment 9 pale, light brownish, with sparse dots at 

 anterior margin; setae blackish or dark brown; medioanal seta long, thick; 

 anterior -angle seta shorter and thinner; intermediate seta moderately long. 



>57 



