sclerite of 3rd segment long dorsally, with a narrow membranous stripe 

 ventrally. Mentum dark brown, in form of a narrow, curved plate like a 

 horseshoej ventral rods straight, with a small, light seta. Palpiger with a 

 longitudinal branch parallel to rod. Labial palps small. 



Pronotum (Figure 587, A) wide, yellowish brown, with sharp lateral edge 

 and wide anterior-angle process; narrow, lateral stripe curved ventrally 

 and with an indentation in middle for articulation with pleuron (Figure 587, B); 

 surface with large tubercles. Setae short, dark, and light; primary 

 anterior-angle seta larger than others. 



Median sclerites of mesonotum (Figure 586) brownish, with darkly 

 outlined dots, which do not reach posterior margin; sclerites form an 

 angular prominence, in about middle of segment, which divides anterior 

 part of thorax from posterior part (Figure 586). A narrow, membranous 

 suture between anterior and posterior lateral sclerites; sclerites covered 

 with large and small tubercles. Primary medioanal seta situated on angular 

 prominence, larger than others; anterior-angle seta situated on lateral 

 sclerite, near several secondary setae; most secondary surface setae small, 

 light, procumbent. 



Median tergites of metanotum brown, blackish; lateral tergites light, 

 yellowish, distinct, a small, intermediate sclerite between anterior median 

 and lateral sclerites; lateral sclerite with transverse groove between 

 anterior and posterior part; tubercles smaller and sparser than on meso- 

 notum; primary setae larger, secondary setae less numerous. 



Propleuron with short, black, pleural suture; epimeron lobed, with dark, 



345 dorsal margin; episternum small, light brown; trochantin relatively large, 

 dark dorsally, with a small seta. Mesopleuron, forming a large, pointed 

 process, which reaches anterior margin of pronotum; pleural suture black, 

 narrow; epimeron rounded posteriorly. Metapleuron much smaller 

 (Figure 586). 



Ventral side of pro- and mesothorax short, that of metathorax normal; 

 ventral horn of prothorax large, situated on a membranous tubercle. Small, 

 lateral sternites with a dark stripe behind horn; mesosternites slightly 

 larger, situated near posterior margin of segment; metasternite single. 



Legs (Figure 588) yellowish brown; ratio of length of legs in 5th stage, 

 87:100:96, in 2nd stage, 94:100:101. Coxae without dorsal groove; dist 

 dorsal depression shallow; tubercles flattened, with small apical spinules 

 (Figure 588, B). Primary anterior setae of fore coxa spine-shaped, distal 

 seta branched at apex (Figure 588, C). Setae of hind leg longer than on the 

 other legs. 



Dorsal process of abdominal segment 1 well developed; lateral 

 processes wide, flat, with lobed process directed upward; ventral surface 

 convex, with a small sclerite resembling metasternite. Ventral elliptical 



346 areas on segments 3—8; segment 8 overlapping segment 9 dorsally. Tergite 

 of segment 9 absent; primary and secondary setae at posterior margin of 

 segment. Gills on segments 2—7. 



Area "b" of anal legs not sclerotized dorsally; median distal seta short, 

 neighboring seta the largest on anal legs. Sclerite "b" with small dark 

 seta. 



Claw with a small dorsal denticle. Setae 1 and 3 situated close to dorsal 

 margin; ventral setae 7 and 8 normally developed; seta 4 situated more 

 basally. 



431 



