situated at about the midlength of the head; setae 15 and 16 thin and small, 

 light, situated behind each other lateral to the 2nd and 3rd spots of the dorsal 

 stripes; seta 17 situated near the second spot, smaller than seta 16. 



FIGURES 621 and 622. Poly centropu s fl a vomacula tus Pict.: 

 621 - head, dorsal; 622 - labrum. 



Head light ventrally; a group of small dots and an oblique row of larger 

 dots which reach almost to the middle of the gular suture on both sides of 

 the occipital foramen. Seta 8 small, light, situated near the anterior margin; 

 seta 18 little marked, setuliform, situated posteriorly. Gula short, broadly 

 triangular, with almost straight anterior margin, yellowish, situated outside 

 the head capsule. 



Anteclypeus light, with 3 broad grayish longitudinal stripes. Labrum 

 (Figure 622) of the form characteristic for Polycentropodidae, but less short 

 than in Plectrocnemia; dorsal sclerite golden yellow; posterior angles 

 and posterior-angle sclerites yellowish brown; setae as in Plectrocne- 

 mia; setae 1 slightly shorter than in Plectrocnemia; seta 3 longer. 

 Mandibles (Figure 624) long, mainly yellowish, reddish brown near the teeth 

 and blades; narrow basal margin of mandibles and articular tubercles 

 brownish. Apical tooth of left mandible narrow, pointed, markedly pro- 

 jecting; upper blade with 3 teeth; lower blade with 3 almost equally long 

 teeth; median depression with a brush of 6—7 chetoids, some of them long. 

 Upper blade of right mandible with a large tooth with a denticle near it; 

 lower blade with 3 distinct teeth and a subapical indistinct tooth in addition 

 to the apical tooth. 



Maxillolabium light yellow (Figure 625). Submentum shorter and broader 

 than in Plectrocnemia; anterior -angle processes narrow, dark; setae 

 thin, light and strong; seta of cardo situated near the basal margin, brownish; 



490 



