2o D. S. FLETCHER 



— Both dorsal and ventral sclerotized, apical processes tapered . . . 52 



52 (51) Fulcrum longer than aedeagus, apex coarsely scobinate. Setose projection 



at base of dorsal process of valve long, slender and digitate . 53 



— Fulcrum shorter than aedeagus, apex tapered to sclerotized point. Setose 



projection at base of dorsal process of valve short and blunt; sclerotized 

 processes at apices of dorsal and ventral margins smooth (Text-fig. 267) 



ignicosta-gvoup (p. 159) 



53 (5 2 ) Ventral apical process of valve acicular; dorsal apical process broader-based, 



margins minutely serrate to tapered apex. Aedeagus acicular (Text-figs 



366, 367) ...... principis-group (part, merga) (p. 209) 



— Apical margin of valve shallowly excavate, dorsal and ventral apices pointed 



(Text-fig. 314). Aedeagus with two smoothly rounded projections at 

 two-thirds, one digitate, one semi-circular. 



metrioscaphes-gxoup (part, fumosa) (p. 176) 



54 (46) Dorsal margin of valve produced in digitate form, the extension longer than 



the basal part from which it arises; dorsal process of valve without setose 

 projection at base (Text-fig. 13). Third abdominal sternite with transverse 

 row of spines ........ ansorgei-group (p. 25) 



— Valve not so formed. Third abdominal sternite without transverse row of 



spines 55 



55 (54) Apex of valve truncate; a longitudinal, medial ridge in apical half terminating 



in a cluster of coarse spines just before apex. Tapered uncus bulbous at 

 base (Text-fig. 209). Underside of hind wing in male densely clothed in 

 specialized scaling in non-hyaline terminal area . . cepa-group (p. 125) 



— Apical area of valve not so formed. Hind wing in male without specialized 



scaling on underside .......... 56 



5° (55) Apical third of valve narrowed to width of apical half of fulcrum, apex 

 spatulate and narrowly rounded; membranous projection at base of dorsal 

 process gross and setose (Text-fig. 246) . . lepta-group (part, lepta) (p. 145) 



— Valve not so formed .......... 57 



57 (56) Apical third of valve spatulate, curved through almost 90 degrees towards 



uncus, apex rounded; setose, membranous projection at base of dorsal 

 process almost as large as apical third of valve (Text-fig. 248) 



lepta group (part, suda) (p. 145) 



— Valve not so formed .......... 58 



58 (57) Vesica bearing al arge, arcuate cornutus, the tapered apex barbed; aedeagus 



with twin lobate, slightly asymmetrical projections at mid-ventral surface. 

 Valve membranous, apex rounded (Text-figs 244, 245). Wings without discal 

 spots .......... dilucida-group (p. 144) 



— Aedeagus and vesica not so formed ........ 59 



59 (58) Arms of gnathus fusing medially to form a clearly defined, strongly sclerotized 



ventral plate ........... 60 



— Arms of gnathus tapered and joined by weakly sclerotized transverse band, or 



joined only by membrane; no ventral plate formed ..... 70 



60 (59) Vesica with one or more cornuti ........ 61 



— Vesica wholly membranous without cornuti, or in part minutely scobinate . 63 



61 (60) Vesica with one cornutus .......... 62 



— Vesica with a cluster or several cornuti, each cornutus equal in length to width 



of aedeagus. Valve membranous; occasionally a longitudinal, setose ridge 

 parallel with dorsal margin is present; dorsal process without setose projection 

 at base 

 minimaria-group (part, aureomarginata, griveaudi, anacantha, phaeozona) (p. 26) 



62 (61) Aedeagus smooth, or scobinate on dorsal surface in apical fourth; fulcrum 



extending well beyond tip of aedeagus, apex weakly scobinate. Valves 



