Anteclypeus pale and oblong, with three indistinct, broad, longitudinal 

 grayish yellow stripes. Labrum (Figure 346) with a broad outer membranous 

 border; dorsal sclerite dark brown, slightly lighter near the anterior 

 margin; posterior-angle sclerites blackish brown, rodlike; between them, at 

 the posterior margin of the sclerite, a brownish, weakly sclerotized stripe; 

 the sclerite bears anteriorly a small process in the middle and small 

 notches laterally; anterior margin of the process concave. Seta 1 short, 

 indistinguishable among the hairs; seta 2 situated on a membrane, curved 

 and transparent; seta 4 situated near the angle of the median process of the 

 sclerite; seta 5 brown, situated at the anterior margin of the sclerite; the 

 shorter seta 3 situated near the angle of the sclerite; seta 6 dark, situated 

 posterior to seta 4; median pit displaced to the right. 



[300) 



FIGURE 344. My strophora altaica Mart. Head, 

 dorsal 



Mandibles with a sharply marked transverse groove; median depression 

 deep (Figure 347); blades without teeth; upper blade of the left mandible 

 serrated; soft, thick feathered setae present in the median depression of the 

 mandibles; outer setae of mandibles situated near the basal margin, close 

 together; the most distal seta is light, small, the second strong, dark brown 

 and long. 



Maxillolabium oblong and massive; pregula narrow, transverse; the dark 

 brown sclerite has a concave anterior margin and is broader than the gula. 

 Submentum (Figure 345) broad anteriorly; its posterior margin with deep 

 semicircular median notch and posteriorly-directed pointed lateral angles; 

 setae near the anterior margin light brown and long. Cardo short; seta 

 small. Stipes consisting of a ventral and lateral part; basal seta light 

 brown, long and curved; distal seta situated near the anterior margin of the 



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