447 10 thin; seta 12 short, brown, situated behind eye; 3 setae on light dorsal 

 line: long, dark seta 14, small seta 13, and the thin seta 15; seta 16 large, 

 dark, situated in angle of light line between longitudinal and transverse part; 

 seta 17 situated medially near frontal suture, short, thin. Ventral seta 8 

 short, near base of mandibles; seta 18 minute, on light background near gula. 



Labrum (Figure 719) wide, with indentation which is tuberculate in the 

 naiddle; setae 1 and 2 represented by large, thick, transparent spines, curved 

 to surface; seta 4 small, but longer and thinner than in A. aterrimus; 

 seta 3 light yellow, thick; setae 5 and 6 thin, dark brown. 



Mandibles slightly oblong, with shallow, median depression; in addition to 

 distal tooth, dorsal blade of right mandible with 2 teeth, ventral blade with 

 2 small, fused teeth; left mandible with 2 teeth on dorsal and ventral blade. 



Maxillolabium (Figure 71 8, C) with a yellowish heart-shaped area on site 

 of submentum, and with long, dark setae at anterior angles; both setae of 

 stipes thin, moderately long; palpifer yellowish brown, apical seta large; 

 basal seta small, light; both situated on membrane. Proximal segment of 

 palp slightly wider than next segment; galea almost reaching apex of palp. 



Pronotum white, with a narrow, blackish stripe at anterior margin 

 (Figure 720, A); 2 large, brownish dots on each side near median suture near 

 posterior margin; lateral groups of 9 — 10 darker, dense dots; anterior 

 corners with several, pale, sparse dots; anterior margin with a row of brown, 

 m.oderately long setae; 10—12 thin, straight setae at anterior angles, at 

 margin and on surface. 



Mesonotum (Figure 720, B) thin, with concave lateral and posterior margin, 

 brownish in middle, whitish laterally; a large, reddish brown dot and 2—3 

 small dots posteriorly near median suture; posterior-angle streaks large, 

 bracket-shaped, dark reddish brown; several pale dots in anterior angle; 

 thin anterior-margin setae dark, moderately long; medioanal setae the same; 

 lateral setae at anterior margin of streaks moderately long, thin; primary 

 anterior-angle setae situated on membrane lateral to sclerite, among a 

 group of 10—11 strong, long, secondary setae situated on atubercle. Anterior- 

 margin and medioanal setae of metanotum similar; anterior- angle groups 

 consisting of 3 — 4 setae of different length. 



Pleurites and leg sclerites brownish yellow. Proepisternum triangular, 

 with narrow brown margin; pleural suture reddish brown; epimeron thin, 

 yellow, with rounded posterior margin and a dark long seta; trochantin 

 conical, pointed, seta not situated distally as in A. aterrimus, but in 

 middle of anterior margin; both setules lateral. Pleural suture of meso- 

 and metathorax blackish brown; distal margin of episternum the same; 

 seta of episternum situated at anterior end of margin, seta of epimeron at 

 posterior margin; both setae long, dark. 



Fore coxa with shallow distodorsal indentation; anterior basodorsal seta 

 moderately long, dark; distodorsal seta short, situated near distal 

 indentation; 8 — 9 thin, secondary setae between primary setae; posterior 

 distodorsal seta long, dark brown, situated near distal indentation; 10 — 11 

 brown, moderately long, secondary setae situated further basally on dorsal 

 and subdorsal side of coxa; primary anterior setae strong, dark; posterior 

 surface with several secondary setae; numerous, large spinules ventrally 

 and subventrally; both primary ventral setae moderately long. 



Trochanter anteriorly with narrow, reddish brown, distal margin; primary 

 anterior seta spine- shaped, dark brown; posterior seta short, strong, brown; 

 both posterior ventral setae long, situated subapically close together; anterior 



560 



