Mandibles yellowish basally^ reddish brown in short distal part, with 

 sharp, projecting, distal tooth, 2 small, tooth- shaped processes further basally: 

 dorsal blade of right mandible with a large pointed apical tooth, and a 

 tooth-shaped basal process: ventral blade with small pointed process on 

 both mandibles: brush absent; lateral setae short, thin, widely separated. 



Submentum (Figure 677, B) with 2 basal sclerites, a narrow median 

 sclerite and 2 small apical transverse plates with setae. Stipes wide, 

 yellow; both setae light. Palpifer similar; maxillary palps conical. 



415 Mentimi brown, in form of short, semicircular, curved sclerite. Labial palps 

 small. 



Pronotum (Figure 678) with pointed, projecting, blackish brown, anterior 

 angles, a wide, dark stripe from them along the sclerite; a similar stripe in 

 middle; yellowish surface forms 3 light, longitudinal stripes between dark 



stripes, one median, 2 lateral. 

 Mesonotum (Figure 678) with similar 

 light and dark longitudinal stripes to 

 middle of sclerite, connected by a 

 wide, dark chestnut brown, transverse 



416 ^^ \ stripe in posterior part in each half, 



and with a marginal row of 5 light 

 spots. 



Anterior median tergite of 

 metanotum (Figure 678) chestnut 

 brown, large, covering almost entire 

 dorsum of segment, with a light 

 median stripe and several dots; 

 posterior transverse tergite little 

 differentiated, in form of a narrow, 

 thin, interrupted setose stripe; 

 lateral tergite slightly oblong, 

 yellowish. Chaetotaxy as in Figure 

 678; setae thin. 



Propleuron represented by a small 

 sclerite with short, black, pleural 

 suture; epimeron larger than 

 episternum; trochantin with a short 

 seta. Pleurites of meso- and 

 metathorax large, with blackish brown 

 pleural suture, epimeron larger than 

 episternum; seta of epimeron 

 moderately long, dark brown, situated 

 distally at suture on mesothorax 

 closer to distoventral angle on 



metathorax; trochantin fused with episternum, seta situated on process. 

 Fore- and midlegs differing markedly in length; hind legs longer than 



midlegs,with long tibiae and tarsi; form of segments and chaetotaxy as in 



Odontoc erum ; secondary setae brownish; femora with light, thin, almost 



transparent, ventral setae (Figure 679). 



Abdominal segments uniformly wide; segment 9 slightly narrower than 8. 



Lateral line forming a row of small, white, dense hairs from middle of 



segment 3 to end of segment 7; lateral line replaced by a row of 10 small, 



reddish brown, sclerotized dots on segment 8. 



FIGURES 680 and 681. 

 sis Iwata: 



Psilotreta kisoen- 



680 - claw of anal leg, lateral (A) and median 

 (B); 681 - larval case. 



52 i 



