82 D. S. FLETCHER 



- Vesica without a cornutus ......... 19 



18 (17) Apex of valve rounded. Aedeagus with digitate, apically rounded projection 



at two-thirds. Fulcrum slender with a pair of symmetrical, angular 

 projections at one-half ........ laciniata (p. 88) 



- Apex of valve truncate. Aedeagus with thorn-like projection at two-thirds. 



Fulcrum asymmetrical with digitate projection midway along one side 



thalia (p. 96) 



19 (17) Apex of dorsal margin of valve produced towards uncus, tip rounded with 



weakly scobinate margin. Aedeagus with a short, spatulate projection 

 at two-thirds. Apex of fulcrum curved dorsad (Text-figs 139, 140). Male 

 coxa with pocket of deciduous brownish grey scales on dorsal surface 



corymbophora (p. 95) 



- Apex of dorsal margin of valve produced towards uncus, tip tapered and 



scobinate on its basal surface. Male coxa not ornamented with specialized 

 scales ............ 20 



20 (19) Apex of ventral margin of valve rounded and simple. Projection from 



aedeagus spatulate with rounded apex, just subequal in length to greatest 

 width of aedeagus (Text-figs 147, 148) .... penthesis (p. 98) 



- Apex of ventral margin of valve rounded and ridged, hence apical area scoop- 



like. Projection from aedeagus small and bicuspid (Text-figs 145, 146) 



astales (p. 97) 



21 (16) Aedeagus with two projections from two-thirds, both acicular or one acicular 



and one thorn-like .......... 22 



- Aedeagus with one tapered, blade-like or one acicular projection from two- 



thirds ............. 24 



22 (21) Both projections from aedeagus acicular, shorter projection longer ( x 4- X 5) 



than cornutus. Fulcrum with a pair of angular projections at two-thirds 

 (Text-figs 108, 109) ....... pringlei (p. 83) 



- Both projections from aedeagus acicular, or one acicular and one thorn-like, 



the shorter projection shorter than cornutus. Fulcrum simple without 

 angular projections .......... 23 



23 (22) Apical third of dorsal margin of valve irregularly scobinate. Both projections 



from aedeagus usually acicular (Text-figs 112, 113), but shorter one some- 

 times thorn-like ......... psectra (p. 84) 



- Apical fourth of dorsal margin of valve irregularly scobinate. Longer 



projection from aedeagus acicular, shorter always thorn-like (Text-figs no, 



in) ........... dentata (p. 83) 



24 (21) Fulcrum with a pair of angular projections at two-thirds. Projection from 



one-half aedeagus tapered, flat and blade-like, one-third as long as aedeagus. 

 Apex of ventral margin of valve acutely angled . . . aclys (p. 96) 



- Fulcrum simple, without angular projections. Projection from two-thirds 



aedeagus acicular. Apex of ventral margin of valve rounded ... 25 



25 (24) Apex of valve smoothly rounded; short scobination of dorsal margin below 



level of apex (Text-fig. 137). Male hind tibia dilate with dense tuft of 

 hair-scales .......... hero (p. 94) 



- Apex of valve not smoothly rounded; scobinate part of dorsal margin level 



with or extending just beyond level of apex (Text-fig. 114). Male hind 

 tibia simple ........... 26 



26 (25) Acicular projection from aedeagus 1*75 times as long as greatest width of 



aedeagus. Distribution: Equatorial Africa . . excavata excavata (p. 85) 



- Acicular projection from aedeagus 0'8 times as long as greatest width of 



aedeagus. Distribution: Ethiopia . . . . excavata pollex (p. 87) 



- Acicular projection from aedeagus 1-25 times as long as greatest width of 



aedeagus. Distribution : Madagascar . . . excavata acis (p. 86) 





