THE POWERI GROUP

(males of chaussieri and poweri unknown)

39(2). Apical margin of tergum IX with slightly separated lateral lobe, each with 12–14 strong setae (Fig. 42 A) ............................................................................ contiguus Apical margin of tergum IX with well separated lateral lobe, each with 12 or less setae (Figs. 39 A; 40A,B; 41A,B; 42B; 43A,B) .................................................... 40 40(39). Apical margin of tergum IX flat, or slightly concave medially; gonostylar claw long, at least 0.25 length of gonostylus (Figs. 39 A; 42B; 43A,B) ...................... 41 Apical margin of tergum IX deeply concave medially; gonostylar claw rather short, at most 0.14 length of gonostylus (Figs. 40 A,B; 41A,B) .......................... 44

41(40). Claspette with distal expanded portion subtriangular in dorsal aspect (Figs. 42 B; 43A,B)..................................................................................................................42 Claspette with distal expanded portion oval in dorsal aspect, with numerous simple setae on the expanded distal portion and bearing 3 stronger, basally widened setae on the apicomesal corner (Fig. 39 A) ........................ hogsbackensis

42(41). Claspette (narrows towards apicomesal angle), with 2–4 somewhat stronger, basally widened setae on the apicomesal angle; aedeagus with lateral teeth longer and stouter than distal teeth (Figs. 43 A,B) .......................................................... 43 Claspette (apicomesal corner formed a slight projection, with apicolateral corner rounded), with 3 stronger, basally widened setae on the apicomesal corner; aedeagus with all rather short teeth (Fig. 42 B) ........................................... langata

43(42). Paraproct with rather short sternal arm, less the length of the apical arm; proctiger without cercal setae (Fig. 44 A) ..................................................................... ledgeri Paraproct with a long sternal arm, as long as or longer than the apical arm; proctiger with 2–5 long cercal setae (Fig. 44 B) .................................................. calceatus

44(40).Claspettewithdistalexpandedportionroundedlobe­likeindorsalaspect(Figs.40 A,B) .............................................................................................................................. 45 Claspette with distal expanded portion square in dorsal aspect (Figs. 41 A,B) .... 46

45(44). Claspette rather small, rounded, with numerous simple setae on the expanded distal portion and bearing 5 strong, basally widened spine­like setae on the apical margin (Fig. 40 B) ......................................................................... mpusiensis Claspette large, rounded,with numerous simple setae on the expanded distal portion and bearing no spine­like setae (Fig. 40 A) .......................................... angustus

46(44). Claspette with 4 strong, basally widened spine­like setae on the apical side (Fig. 41 B) ....................................................................................................... ethiopiensis Claspette with 9 strong, basally widened spine­like setae on the apical side and mesal side (Fig. 41 A) ................................................................................ usambara