REVISION OF GENUS ZAMARADA 239 



Guinea: Beyla (Dr Mir. Mrdzek), 1 <$, 4 $ (MM, Brno). Sierra Leone 

 Wilber force, 2 miles S. of Freetown, 3-400 ft (C. A. Forster), 1 <$ (UM, Oxford) 

 Freetown, x-xii. 1968 (D. F. Owen), 3 <$, 1 $; Bo, 22.xii.1957 (/?. Taylor), 1 ^ 

 ibidem, vi, x (A\ i?«*//), I (J, 1 $ (all BMNH). Liberia: MarshaU Terr., Harbel 

 i-iv, ix-xii (R. M. Fox), 9 <$, 1 $ (CM, Pittsburgh); Nimba, Grassfield, vi-vii 

 (.4. Forbes-Watson), 1 ^ (NMK, Nairobi). Ivory Coast: Bingerville, vi-xi 

 (G. Melon), 9 J 1 , 6 $. Nigeria: Mambilla Plateau, Karmantan Forest, 5500 ft, 

 10.xii.1968 (H. Roberts), 1 <$; Ilesha (Humfrey), 2 $; Degama (i> Ansorge), 1 $>. 

 Cameroun: Savanes d'Akak, 14 km N.N.E. of Yaounde, 28.viii.1971 (P. Darge), 

 I ^ (coll. Herbulot, Paris); Bitje, Ja River, 2000ft, iv-v. 1907, smaller rains 

 (G. L. Bates), 1 <J (BMNH); Efulen, iv, v, x (H. L. Weber), 3 <J (CM, Pittsburgh). 

 Fernando Po (W. Cooper), 2 $ (BMNH). Gabon: Mouila, 30.ix.1964 (P. Darge). 

 1 $ (coll. Herbulot, Paris). Zaire ('Belgian Congo'): W. Kivu, south side Middle 

 Lowa Valley, S. of Walikali, 3500ft, forest, iv. 1924, wet season (T. A. Barns), 

 1 cJ (BMNH). 



The TRIA NG ULA RIS-Grovp 



Externally similar to species in the reflexaria-group. Characterized in the 

 male genitalia by the symmetrical, bifurcate valves; the extended dorsal margin 

 of each is tapered and usually smooth, though sometimes irregularly margined; 

 the extended ventral margin is rounded at tip. The uncus is similar to that of 

 the reflexaria-group; ventral plate of gnathus slender and minutely scobinate, 

 apex narrowly rounded; juxta weakly developed; aedeagus tapered or blade-like; 

 fulcrum slender, longer than aedeagus, the tip minutely scobinate. 



The male hind tibia is dilate. 



In those species in which the female is known, the operculum is U-shaped with 

 crenulate edges. The lamella antevaginalis consists of a strongly sclerotized 

 plate, transversely ridged or crenulate-edged. Ductus bursae broadened posteriorly, 

 lateral apices finely tapered. 



Four species are included in the group; a further five species from West African 

 localities are represented in the BMNH, but material available for study is 

 inadequate for description. 



Key to Species 



1 Apical extension of ventral margin of valve straight, one-third as broad as 



long (Text-figs 409, 411) ........ 2 



- Apical extension of ventral margin of valve incurved towards uncus, two- 



thirds as broad as long (Text-figs 405, 407) ..... 3 



2 (1) Apical extension of dorsal margin of valve one-half as long as that of ventral 



margin (Text-fig. 409). Hyaline area of wings tinged with light buff; 

 distal margin on fore wing straight .... crenulata (p. 241) 



- Apical extension of dorsal margin of valve equal in length to that of ventral 



margin (Text-fig. 411). Hyaline area of wings tinged with greenish 

 yellow, distal margin on each wing broadly excurved between veins M 3 and 

 C« lb ........... erosa (p. 242) 



