REVISION OF GENUS ZAMARADA 79 



Measurements. Fore wing: q 15-16 mm; $ 14-16 mm. 



Most reliably distinguished from examples of flavicosta with shallowly excavate 

 non-hyaline terminal areas by the genitalia. 



Distribution (Map 2). Nigeria. 



Holotype <$, Nigeria (Lower Nigeria): Old Calabar (F. G. Pudney), Geometridae 

 genitalia slide no. 7851, in BMNH. 



Paratypes. Nigeria: Lagos, Ebute Meta, 17.vii.1906 (G. L. Boag), 1 $; Ikom, 

 7.V.1930 (E. Haig), 1 $; Warri, vi. 1896 (Dr Roth) (Zamarada flavicosta Warren, 

 paralectotype), 1 $; Warri, iv. 1897, 1 <J, 3 $; R. Niger, Sapele (F. W. Sampson), 

 I <j>; holotype data, 1 ^ (all BMNH); Calabar, vi. 1961 (G. Markham), 1 $ (NMK, 

 Nairobi) . 



Zamarada schalida sp. n. 



(Text-figs 106, 107; PI. 22, figs 539, 540; PI. 101, fig. 908; Map 2) 



c£$ (PI. 101, fig. 908). Colour and discal spotting of hyaline area and colours of non-hyaline 

 area similar to those of other species in the flavicosta-group, but distinguished by the shape 

 and depth of the excavation of the non-hyaline terminal area of each wing between veins 

 M 3 and Cw lb . 



<$ genitalia (Text-figs 106, 107). Distinguished from closely similar regularis by the more 

 slender, asymmetrical apices of the valves, the shorter narrowed apical part of the aedeagus 

 and the markedly denser and shorter scobination in the apical third of the fulcrum. 



$ genitalia (PL 22, figs 539, 540). Distinguished by the strongly developed, Y-shaped 

 projection from the sterigma. 



Measurements. Fore wing: g $ 14-16 mm. Antennal pectinations: <§ 13 X, $ 8 < 

 diameter of shaft. 



Distribution (Map 2). Cameroun, Gabon, Zaire. 



Holotype $, Cameroun ('Kamerun'): Johann-Albrechts Hohe, 1898 (L. Conradt), 

 Geometridae genitalia slide no. 7857, in BMNH. 



Paratypes. Cameroun: holotype data, 1 g, 1 $ (BMNH); Efulen, 5.^.1923 

 (H. L. Weber), 1 ^; ibidem, 20.xi.1914, 1 $ (both CM, Pittsburgh). Gabon: rives 

 Ivindo, 35 km S. Makokou, 2.V.1963 (G. Bernardi), 1 $ (MBG, Paris). Zaire 

 ('Belgian Congo'): Equateur, Flandria, vi. 1934 (R. P. Hulstaert), 1 $ (MRAC, 

 Tervuren) ; W. Kivu, Nr Masisi, Upper Lowa Valley, 5-6000 ft, forest and long grass, 

 ii. 1924, wet season (T. A. Barns), 1 $ (BMNH). 



There is also a pair without data from the Holland collection (CM, Pittsburgh). 



The EXCAVATA -Group 



Species in the excavata-group have the patterned, non-hyaline terminal area of 

 each wing deeply excavate between veins M 3 and Cw lb ; the hyaline area varies in 

 colour from greyish green to dull yellow. The range of the fore wing length is 

 12-19 mm - The group is characterized in the male genitalia by the form of the 



