Labrum entirely sclerotized dorsally; anterior margin of dorsal sclerite 

 with crenated middle; posterior-angle sclerites in form of thin reddish 

 brown rods. Setae 1 and 2 situated on sides of sclerite, transparent, close to 

 anterior margin; seta 3 lateral to margin; setae 4 short, thick, in middle 

 near anterior margin; setae 5 and 6 situated posteriorly close together one 

 behind the other, both straight, thin, long. 

 420 Mandibles (Figure 683) with deep, narrow, median indentation; left mandible 

 with 2 apical teeth and one tooth on dorsal and ventral blades; right mandible 

 with one apical tooth, and one subapical tooth on dorsal and ventral blades; 

 both mandibles with a brush consisting of a double tuft of hairs directed 

 inward and situated dorsally at margin of median indentation in middle; 

 lateral setae situated basally, long, thin. 



Maxillolabium (Figure 684) weakly sclerotized. Sclerites of cardo in 

 form of narrow transverse plates with 2 short anterior setae. Submentum 

 not sclerotized, with a single row of 12 short, thick setae laterally. Stipes 

 narrow, reddish brown; both setae situated on membrane, moderately long, 

 apical larger than basal. Palpifer and small sclerites of palp segments 

 brownish; both setae of palpifer situated distally, one short and situated on 

 membrane, the other larger, on sclerite. Maxillary palp short, segment 2 

 larger than 1, segments 3—4 very small. Galea finger-shaped, pressed to 

 palp. Mentum (Figure 684) in form of a short, reddish brown, transverse 

 plate; ventral sclerites dot- shaped, with thin setae; labial palps cylindrical, 

 both sensillae distinct; labial lobe conical. 



FIGURE 685. Molanna a ngu sta ta Curt. Thoracic 

 segments, dorsal 



526 



