60 A. WATSON 



Negera quadricornis sp. n. 



(Text-figs. 74, 91-94 ; PI. 5, figs. 287-289 ; Map 3) 



Description. q\ Head and appendages as for confusa. Thorax and fore leg as for confusa. 

 Mid and hind legs mainly very pale buff ; pinkish at distal end of tibia ; each tarsal segment 

 slightly darker distally on outer surface. Outer margin of fore wing moderately convex (Text- 

 fig. 74), more strongly convex in most specimens than in confusa. Pattern and coloration of 

 upper surface of fore wing of holotype as for holotype of confusa except for more conspicuous 

 white subterminal dashes on both wings. Under surface of holotype pale, pinkish brown, with 

 discocellular spot absent from fore wing ; coloration and markings of remaining paratypes as for 

 confusa. 



o* genitalia (Text-figs. 91-93) : valve strongly bifurcate ; gnathus produced for short dis- 

 tance into diaphragma medially, teeth short and blunt ; aedeagus with spinose patch apically, 

 vesica with three patches of spines ; posterior margin of eighth tergum emarginate medially, 

 eighth sternum as in Text-fig. 93. 



$ (Plate 5, fig. 287). Similar to male, but outer margin of fore wing more strongly convex and 

 apex strongly produced and falcate. 



$ genitalia (Text-fig. 94) : dorsal part of ninth segment curiously shaped, with cordate 

 anterior evagination and digitate posterior process ; eighth segment also well developed ; 

 posterior part of ductus bursae sclerotized. 



Measurements. A.P.R. : 5*. 16 ; $. (no complete antenna). Wing : <$. 22-5, 205- 

 24-0 mm. (9) ; $. 23-0 (1). 



Discussion. This species is externally similar to ramosa, confusa, unispinosa, 

 clenchi, and disspinosa, but most male specimens can be distinguished by the more 

 strongly convex outer margin of the fore wing. In the male genitalia the shape of 

 the valves and posterior margin of the eighth tergum together with the shape and 

 ornamentation of the aedeagus provide distinctive and reliable diagnostic characters. 



As in most species of Negera this species exhibits striking variation in the coloration 

 of the upper surface of the wings. The ground-colour may be pale reddish, yellowish 

 or greyish brown, usually lightly speckled with black or dark brown, but more 

 heavily speckled with black in three paratypes (2 $, type locality, and 1 $, Congo, 

 Kivu ; see Plate 5, fig. 289) in which much of the area between the medial fascia of 

 the fore wing is replaced by black. One male from Cameroun has a large black spot 

 as the fore wing posterior to the cell between Cu lb and 1A : in the holotype and 

 remaining paratypes this spot is very faintly marked (Plate 5, fig. 288). 



The single female, listed below, which I have identified as quadricornis, was 

 collected at the same locality and on the same day as the male holotype. There 

 is little doubt that these two specimens are conspecific. 



Distribution (Map 3). Known from Uganda, Congo, Angola and Cameroun, 

 in areas of either rain-forest or montane forest. 



Material examined. Type. Holotype^, Uganda, Mt. Elgon, x.1931, No. 166 

 (Jackson) : Drepanidae genitalia slide No. 1072 ; in the British Museum (Natural 

 History) . 



Paratypes. British Museum (Natural History). Uganda : 2 <$, 1 $, same data as 

 type ; 1 <$, Mt. Elgon, ix.1931 (Jackson). Congo : 1 <$, W. Kivu, Katana, 5,000- 

 7,000 ft., iv. 1924 (Barns). Angola; i $, Pungo Andongo (Homeyer) . Cameroun: 

 1 (J, Bitje, Ja River, x-xi.1913. Musee Royal de I'Afrique centrale, Tervuren. 



