106 D. S. FLETCHER 



o (3) Dorsal third of valve strongly sclerotized; apical half of sclerotized area 



coarsely scobinate ....... strigilecula (p. 112) 



- Valve not so formed .......... 10 



10 (9) Aedeagus with projection from between two-thirds to three-fourths . . 11 



- Aedeagus without projection ......... 17 



11 (10) Vesica with cornutus .......... 12 



- Vesica without cornutus ......... 14 



12 (11) Apex of valve tapered and inclined towards uncus, apical area triangular 



in shape (Text-fig. 191). Cornutus scobinate. Non-hyaline terminal 



area of wings predominantly purplish grey .... urania (p. 118) 



- Valve of even width to broadly rounded apical margin; apex of dorsal margin 



finely produced and inclined towards uncus (Text-figs 177, 179). Cornutus 

 smooth. Non-hyaline terminal area of wings predominantly reddish brown 13 



13 (12) Finely produced apex of dorsal margin of valve acicular in form and minutely 



scobinate. Projection from two-thirds aedeagus straight and acicular, 

 basal two-thirds of even width ..... ferruginata (p. 113) 



- Finely produced apex of dorsal margin bifurcate at tip. Projection from 



three-fourths aedeagus broad-based and thorn-like . . arguta (p. 113) 



14 (11) Fulcrum broadened asymmetrically at apex, extending beyond and enfolding 



apex of aedeagus; apex with two unequal projections, each with a short, 

 thorn-like tip. Non-hyaline terminal area of wing predominantly dark 

 brown .......... flbulata (p. 117) 



- Fulcrum not so formed. Non-hyaline terminal area of wings predominantly 



reddish brown ........... 15 



15 (14) Dorsal margin of valve with serrate ridge in apical fourth. Projection from 



aedeagus arising at two-thirds ..... . chrysopa (p. 116) 



- Dorsal margin of valve smooth. Projection from aedeagus arising at three- 



fourths ............ 16 



16 (15) Ground colour of non-hyaline terminal area yellowish brown; proportion 



of non-hyaline to hyaline area at costa of fore wing 5 : 11 to 5 : 13 



dentigera dentigera (p. 115) 



- Ground colour of non-hyaline terminal area straw yellow; proportion of 



non-hyaline to hyaline areas at costa of fore wing 4 : 14 to 4 : 15 



dentigera stenotes (p. 116) 



17 (10) Vesica with two cornuti, one tapered and hook-like, one scobinate . . 18 



- Vesica with one cornutus ......... 19 



18 (17) Valve tapered to narrowly rounded apex; hair-scales of coremata greyish buff. 



Fulcrum smooth-edged ....... aglae (p. 120) 



- Apex of valve produced in digitate form, extension two-thirds as long as uncus ; 



hair-scales of coremata black. Fulcrum with a pair of angular projections 



at three-fourths ........ melanopyga (p. 119) 



19 (17) Valve with a tapered, digitate projection two-thirds as long as uncus, 



extending posteriorly from mid-apical margin. Apex of fulcrum dilate, 

 margins asymmetrically serrate ...... ariste (p. 121) 



- Valves and fulcrum not so formed ........ 20 



20 (19) Cornutus curved abruptly through 90 degrees at mid-length. Fulcrum 



sinuous in apical half, margin dilate at three-fourths . . . . 21 



- Cornutus not curved abruptly. Fulcrum slender and smooth, rod-like in 



apical half ............ 22 



21 (20) Apex of valve rounded, apical fourth of dorsal margin very weakly sclerotized, 



the margin weakly serrate (Text-fig. 201) . . . phoenopasta (p. 122) 



Apex of valve curved, apex of dorsal margin produced in digitate form towards 



uncus (Text-fig. 195) . . . . . . . ostracodes (p. 120) 



