FIGURES 146— 148. Thamastes dipterus Hag.: 



146 — head, dorsal (A) and ventral, anterior part (B); 147 — pronotum; 148 — mesonotum 

 and mesopleuron. 



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Mandibles reddish brown, large, about half as long as head, spatulate, 

 without teeth; brush on dorsal margin consisting of light, sparse chaetoids; 

 the dorsal of the 2 outer setae short and brown, the ventral light, thin, 

 very small. 



Cardo forming a narrow, brown plate with large black spots, on the 

 inner and outer sides; outer seta light, small; 2nd seta situated on the 

 spot, yellowish, larger. Submentum largely membranous, whitish; seta 

 short, thin, situated on membrane. Stipes yellowish brown; outer seta 

 thin, brown, median seta darker, of the same length. Palpifer large, 

 brown; distal seta reddish brown, median seta small, light. Palp short, 

 1st segment much wider than the following, last segment only slightly 

 smaller than the penultimate segment. Galea tubercle -shaped, with large 

 sensillae. Mentum in form of narrow, reddish brown semicircle; ventral 

 sclerites forming grayish bands; seta small, brownish. Palpiger narrow, 

 horseshoe-shaped, dark at the base, small, shorter than apex of labium. 



Pronotum yellowish to light brown, longer in middle, short laterally 

 (Figure 147). Anterior margin narrowly brownish; 15—16 large, light. 



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