Labrum narrower than anterior margin of frontoclypeus, with broad, 

 membranous, anterior margin; median indentation small; dorsal sclerite 

 brown; posterior-angle sclerites reddish brown; seta 1 small; dorsal 

 sclerite brown; posterior-angle sclerites reddish brown; seta 1 small, light, 

 situated on membrane near margin; seta 2 situated lateral to 1; seta 4 

 small, slightly thicker, situated on sclerite near posterior margin of median 

 depression; seta 3 straight, short, light, situated near margin in anterior 

 angle; setae 5 and 6 situated on surface, bi'ownish, with thin, long end, seta 5 

 larger than 6. 



Mandibles short, with brownish distal and ventral parts, blackish brown 

 elsewhere; left mandible distally with 2 teeth, its dorsal blade in form of 

 a thin, projecting plate with a brush of light, relatively short chaetoids 

 submarginally in middle; ventral margin slightly curved, blade little 

 differentiated; one of 2 distal teeth of right mandible larger than other; 

 dorsal blade less prominent, brush similar; lateral setae situated basally, 

 relatively large, reaching end of mandible, of equal length, pale yellowish. 



394 



650 



651 



FIGURES 650 and 651. Micrasema sp.: 



650 — head, dorsal (A) and ventral (B); 651 — pronotum (A), mesonotum and mesopleuron (B). 



Sclerites of cardo reddish brown; median margin with sharp anterior 

 process. Sclerites of submentum represented by 2 large, transverse, 

 yellowish plates divided by a narrow membranous stripe; seta moderately 



494 



