154 P- E. S. WHALLEY 



(Feather), Rhodoneura bryaxis Fawcett, cotype, BM slide no. 13138, in BMNH (no 

 male specimens in original series). 



Other material. Kenya: i $, Kedai, 12.iii.1912 (Feather), (paralectotype) ; 1 $, 

 Kedai, 26.xii.1912 (Feather) ; 2 $, Masongaleni, 25.xii.1911 (Feather) ; 3 $, Voi, xi.1951 

 (Sheldrick), in NMK; 8 $, Kibwezi, 20.xii. (Feather); 4 $, Kibwezi, 21.xii.1916 

 (Feather); 2 $, Kibwezi, 18.xii.1916 (Feather); 3 $, Kibwezi, 14.1.1917 (Feather); 

 1 <J, Kibwezi, 22.xii.1918 (Feather); 1 <$, Kibwezi, 29.lv. 1919 (Feather); 1 9, Kibwezi, 

 xii.1927 (Feather); 2 $, Nairobi, iv.1930 (van Someren); 1 $, Sokoke Forest, Kilifi, 

 ix.1965 (Duff-Mackay), in NMK. 



S7JC/A gen. n. 



Type-species, Sijua parvula sp. n. 



This genus contains nine similarly patterned species and one species which is 

 only tentatively placed in this genus. Most of the species in the genus have pale, 

 sandy brown wings with a very similar pattern. The males of the genus can be 

 separated from all other African species by the Y-shaped tergal sclerite (see later). 

 Occasionally this Y-shaped sclerite is closed at the top. Morphologically this genus 

 is similar to Nemea Whalley but this genus lacks the Y-shaped sclerite and generally 

 has a more enlarged gnathus. At present species of the genus Sijua are only known 

 from Africa where it is found mainly in West Africa, with the exception of S. meriani. 

 This latter species is from the Seychelles and only one badly damaged specimen is 

 known. 



Generic description. Antennae minutely ciliate. Labial palps 3-segmented. Eyes 

 without interfacetal hairs. Proboscis present. Fore wing with radial veins from cell. Fore 

 tibia with epiphysis. Hind tibia with two pairs of spurs. Tarsi without spines. Valve of 

 male genitalia simple. Gnathus present. Prominent Y-shaped sclerite on tergum of IXth 

 segment of male. Female usually with minute spines over bursa, sometimes with small patches 

 of spines grouped together. Duct of bursa minutely spined. 



Biology. No information. 



Key to the Males of the African Species of SIJUA 



1 Prominent hind wing fascia, either complete or made up of spots, usually brown 



edged with varying width of white ........ 2 



- Hind wings without prominent fascia ........ 4 



2 (1) Fore wing with broad white fascia, wing colour mostly white, median hind wing 



fascia consisting of black spots ..... neolatizona (p. 161) 



- Fore wing without conspicuous fascia. Colour of fore wing sandy brown or grey 3 



3 (2) Small species, wing under 11 mm. Grey fore wings, hind wing fascia narrow. 



Black spot in fore and hind wing. Terminal margin of hind wing incised below 

 apex ........... canitia (p. 163) 



- Larger species, wing over 11 mm. Brown or yellow-brown fore wing. Hind 



wing fascia broad. Black spot on hind wing only. Terminal margin of hind 



wing not incised below apex ...... latizonalis (p. 162) 



4 (1) Gnathus long, 3 X or more as long as wide ....... 5 



- Gnathus short, less than 2 x as long as wide ...... 6 



5 (4) Prominent white apical mark on fore wing, edged with brown. Basal process 



of valve upturned ........ furcatula (p. 159) 



