(298) 



525 



FIGURES 524 and 525. Chaetopteryx sahl be rgi McL.: 



524 — head, .dorsal (A) and ventral (B); 525 - tergites of metathorax. 



Labrum with shallow median indentation; dorsal sclerite uniformly 

 reddish brown; dark median spot absent; posterior angle sclerites blackish 

 brown at end; seta 1 in form of small, blunt, light spine; setae 2 and 4 

 represented by thick, blunt spines, 4 larger; seta 8 light, short, pointed; 

 setae 5 and 6 brown, about the same length. 



Mandibles slightly oblong, with a transverse ridge in middle; basal part 

 blackish brown, apical part reddish at margin of blade; left mandible with 

 2 large teeth and 1 small tooth in addition to middle tooth on dorsal blade, 

 and 2 small teeth subapically on ventral blade; right mandible with 4 distal 

 teeth on dorsal blade; lateral setae situated basally; thin, dorsal seta 

 brownish, almost twice as long as small, thin, ventral seta. 



Sclerites of cardo yellowish, with da.rk brown posterior margin; median 

 margin and dark lateral stripe black; lateral seta light, 2nd seta dark, both 

 thin, small. Submentum mainly membranous, whitish yellow, with small, 

 grayish brown, median sclerites fused with lateral sclerites; setae brown, 

 moderately long. Stipes yellowish, with reddish posterior margin; lateral 

 seta light brown, moderately long, median seta short, brown. 



375 



