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seta 13 small, spine-shaped, slightly larger than 10; seta 15 situated behind 

 14, very long, slightly shorter than 14; seta 16 short, light, resembling the 

 secondary seta; seta 17 situated anterior to the fork near the suture, short, 

 yellowish, thick. Ventral side: seta 8 snaall, dark, seta 18 light, slightly 

 smaller than 8; in the area between setae 9 and 15, there are 7—8 small 

 secondary light setae. 



Dorsal sclerite of labrum light brown; anterior -margin processes 

 reddish brown; posterior margin with broad blackish brown stripe in 

 the middle; posterior-angle sclerites narrow, brown; setae as in 

 Thamastes dipterus. Mandibles large, mainly black, pinkish apically, 

 without teeth; dorsal margin with a brush of light, short, chaetoids which 

 become very small near the apex. 



Maxillolabium as in T h. dipterus. Cardo with large median and 

 outer black spots. 



FIGURES 151 and 152. Baicalodes ovalisMart.: 



151 —head, dorsal (A) and ventral, anterior part(B); 152 — pronotum. 



Pronotum (Figure 152) pale yellowish; anterior margin grayish brown, 

 with numerous short, thfck, brown spinules ; 1st marginal row consisting of 

 20—21 spinules directed anteriorly; 2nd row less regular, with 14—16 spinules 

 directed more upward; 6—7 small, pointed spinules close to the margin; 

 lateral margin short, without spinules. Posterior part of tergite with 

 2—3 dots near the median suture ort each side; middle of each half with 



112 



