36 P. E. S. WHALLEY 



Key to the African Species of CHRYSOTYPUS 



i Pale yellow species with faint reticulation .... subflavus (p. 41) 



- Reticulations or pattern more distinct ........ 2 



2 (1) Single pair of tibial spurs ....... circumfuscus (p. 39) 



(Some specimens of vittiferalis with reduced spurs may come out here.) 



- Two pairs of tibial spurs, proximal pair sometimes very reduced ... 3 



3 (2) Ground colour whitish or yellowish, strong reticulate pattern and black discal 



spot in fore and hind wing (discal spot often a small black ring) ... 4 



- Not as above ............ 5 



4 (3) Ground colour whitish. Black discal spot in fore and hind wing very distinct. 



Y-shaped subapical line on fore wing. Genitalia as in PI. 26, fig. 137 {<$) ; PI. 



49, figs 279, 280 ($) ....... tessellatus (p. 38) 



- Ground colour yellowish. Black discal spot on fore and hind wing less clear than 



previous species. Subapical line straight. Genitalia as in PI. 26, fig. 139 ($); 



PI. 49, figs 283, 284 ($)....... reticulatus (p. 41) 



5 (3) Wing pattern with prominent transverse fascia, ground colour yellowish. 



Reticulations not distinct (PI. 3, fig. 6). Juxta of male with lateral teeth 



luteofuscus (p. 42) 



- Not as above ............ 6 



6 (5) Large species (wing 20 mm or over), strongly reticulate pattern and prominently 



pectinate antennae (PI. 4, fig. 9) .... vittiferalis (p. 44) 



- Not as above ............ 7 



7 (6) Ground colour dark reddish brown, prominent square-shaped discal spot on fore 



wing and often on hind wing. Juxta in male apically toothed quadratus (p. 38) 



- Not as above ............ 8 



8 (7) Wing generally under 19 mm. Ground colour yellowish brown, reticulations as 



in PL 4, fig. 7. Juxta of male with short lateral lobes . . splendidus (p. 43) 



- Wings generally over 19 mm. Ground colour dark brown, reticulations as in 



PI. 3, fig. 1. Juxta of male with elongate lateral lobes . dawsoni (p. 36) 



Chrysotypus dawsoni Distant 

 (PI. 3, figs 1, 2; PI. 26, fig. 135; PL 48, figs 272, 273; Text-fig. 15) 



Chrysotypus dawsoni Distant, 1897 : 210. 

 Proterozeuxis ansorgei Warren, 1899b : 289, syn. n. 

 Plagiosella pectinifera Hampson, 1906 : 122, syn. n. 

 Proterozeuxis brunnea Warren, 1908 : 346, syn. n. 

 Plagiosella pectinifera Hampson; Dalle Torre, 1914 : 39. 

 Proterozeuxis arcuatalis Gaede, 1917 : 381, syn. n. 



<J. Wing, 19—29-5 mm. Vertex brown, flattened between antennae. Tuft of brown 

 scales on frons projecting between eyes. Clypeus slightly swollen. Proboscis reduced. 

 Antennae strongly bipectinate. Labial palps with third segment 1/3 length of second, pro- 

 jecting slightly beyond head. Thorax light brown. Hind tibia with two pairs of short spurs, 

 outer spur approximately equal in length to inner spur. Abdomen brown. Fore wing, pattern 

 as in PL 3, fig. 1, brown with darker markings. Veins R i and R 6 shortly stalked. Underside 

 similar, paler coloured. Hind wing, colour and pattern as fore wing. Veins Sc +R t not joining 

 Rs. Cell closed. 



Genitalia q* (PL 26, fig. 135). Lateral arms of juxta slightly hairy, main part of juxta 

 apically expanded. 



$. Wing, 25'5-34*5 mm (PL 3, fig. 2). Colour and pattern as in male. Labial palps 

 with third segment 1/3 length of second. 



Genitalia $ (PL 48, figs 272, 273; Text-fig. 15). No signum. Neck of duct broadly 

 sclerotized. 



