204 



H. STEMPFFER 



robust, clothed below with white hair, <$ fore leg, femur clothed below with long white hair, 

 tibia shorter than the femur, tarsus unsegmented, finely spinose below. 



Wing shape. Fore wing subtriangular, apex angular, outer margin slightly convex ; hind 

 wing suboval, anal angle well marked, a short filiform tail at the end of vein 2. 



Wing venation (Text-fig. 324). Fore wing with 11 veins ; 10 and 11 free from the upper 

 edge of the cell ; 12 is slightly curved towards n, but not touching it. 



Male genitalia (Text-fig. 174). Uncus composed of two small subtriangular lobes with 

 rounded apices fused to the lateral angles of the tegumen, each bearing a small projecting 

 tubercle with rounded apex crowned with stiff hairs ; subunci very robust with massive bases, 

 curved, and ending in an open claw ; tegumen large with a very convex posterior margin, 

 giving the dorsal structures a trilobed appearance ; vinculum broad above, narrow below ; 

 lower fultura furca-like with slender arms ; valves broadly oval at the base ; distally spatulate, 

 the lower edge bearing sharp and irregular teeth which vary somewhat in shape in different 

 specimens ; penis short, stumpy, vesica with fine cornuti ; uncus and distal portions of the 

 valves pilose. 



In their external characters (colour and markings of the wings) darius, virilis and 

 audeoudi so closely resemble lingeus that they have for a long time been considered 

 varieties of it ; their genitalia, however, show quite clearly that they are separate 

 species. 



In darius (Text-fig. 175) the dorsal structures resemble those of lingeus, but the 

 two processes of the valve are widely separate at their apices and the upper one, 

 which is much longer than the lower one, is broad and heel-shaped. 



In 1938 (Mission Omo 4 : 196) I figured the male genitalia of virilis and andeoudi. 

 Examination of these figures will show that in these two species the valves resemble 

 those of lingeus, but the dorsal structures are very different : no tubercles on the 

 uncus lobes, subunci longer and less robust, and in particular the posterior margin 

 of the tegumen, instead of being markedly convex, is concave and so reduced to a 

 narrow band medially. 



In ethiopicus and dicksoni (for reference to figures see list of species) the tegumen 

 is similarly reduced to a narrow band in its median portion, but tubercles on the 



Fig. 174. Cacyreus lingeus lingeus (Cramer), <$ genitalia. 



