8 A. WATSON 



of the genitalia. The scale placed by each drawing or group of drawings represents 

 one millimetre. The illustrations are of a ventral view unless stated otherwise. 

 The half-tone plates were prepared from photographs taken by the Photographic 

 Section of this Museum. 



References in the text have been given in an abbreviated form, the full reference 

 appearing in the terminal bibliography. The bibliographical synonymy preceding 

 the account of each taxon includes references to synonyms and to works of major 

 taxonomic importance only. 



Key to Genera of Drepanidae of the Ethiopian Region 

 Male and Female 



i Proboscis vestigial ; fore tibia without epiphysis ; mid and hind tibiae without spurs ; 



frenulum present in male ..... (Nidarinae) NIDARA (p. 158) 



- Proboscis absent, vestigial, or well developed ; fore tibia with epiphysis ; mid tibia 



with one pair of spurs, hind tibia with one or two pairs of spurs ; frenulum present 



or absent in male ........... 2 



2 Proboscis well developed ; frenulum present in male 



(Drepaninae) CALLIDREPANA (p. 149) 



- Proboscis vestigial or absent ; frenulum absent in male . . . (Oretinae) 3 



3 Antenna bipectinate ........... 4 



- Antenna unipectinate or unilamellate ........ 5 



4 Outer margin of fore wing produced or angulate at middle, outer margin of hind wing 



usually with small process posterior to middle (e.g. Plate 1, figs. 271, 272) ; male 

 genitalia without gnathus, eighth abdominal sternum considerably modified (Text- 

 figs- 5-73) EPICAMPOPTERA (p. 9) 



- Outer margin of fore wing not produced or angulate at middle, outer margin of hind 



wing evenly convex or weakly angulate anterior to middle (Plates 5 and 6, figs. 

 287-294) ; male genitalia with strongly developed gnathus, eighth abdominal 

 sternum little modified (Text-figs. 75-108) .... NEGERA (p. 47) 



5 Antenna unipectinate ........... 6 



- Antenna unilamellate ........... 10 



6 Proboscis absent ; dark subterminal spot present on hind wing between Cw la and 



Cj^jb (Plate 15, figs. 331-333) ; male genitalia as in Text-figs. 232-234 



ARCHIDREPANA (p. 142) 



- Proboscis present ; hind wing without subterminal spot between Cu la and Cn^ ; 



male genitalia not as in Text-figs. 232-234 ....... 7 



7 Fore wing with conspicuous apical spot (Plate 10, fig. 312) ; diaphragma of male 



genitalia with pair of large setose sacs .... URANOMETRA (p. 139) 



- Fore wing without apical spot ; diaphragma without setose sacs .... 8 



8 Outer margin of fore wing with angulate process at middle (Plate 17, fig. 341) 



GONORETODES (p. 91) 



- Outer margin of fore wing without process at middle ...... 9 



9 Antenna unipectinate. Outer margin of hind wing evenly convex, or convex except 



for weakly concave posterior section (Plates 11-13, figs. 313-325). Male genitalia : 

 gnathus absent, anellus well developed, eighth abdominal sternum little modified 

 (Text-figs. 188-218) CROCINIS (p. 114) 



- Antenna unipectinate or unilamellate. Outer margin of hind wing either straight 



with sharply angulate outer angle or evenly convex (Plates 9 and 10, figs. 305-31 1). 

 Male genitalia : gnathus present, anellus weakly developed, eighth abdominal 

 sternum considerably modified (Text-figs. 154-187) . . . SPIDIA (p. 94) 



