76 P. E. S. WHALLEY 



juxta arms oblique, slightly toothed. VHIth sternite as in Text-fig. 13. Aedeagus with two 

 groups of cornuti. 

 $. Unknown. 



Discussion. This species is smaller than strigifera but otherwise cannot be 

 distinguished on external characters. The genitalia of these two species are very 

 distinct. The three-spined uncus, prominent toothed costal valve process and the 

 shape of the juxta distinguish augescere from all the other species in the complex. 

 The single specimen from Fernan Vaz (Gabon) may represent a distinct species, 

 differing slightly in the structure of the genitalia. When more specimens of the 

 strigifera-gvonp are known the relationship of these species may be clearer. 



Distribution. Map 32. Democratic Republic of the Congo; Gabon; Zambia. 



Material examined. 



Holotype <$, Democratic Republic of the Congo ; W. Kivu [misspelled Klva on 

 label], Lowowo Valley, south side, Lowa Distr., 4000 ft, mountain forest, wet season, 

 iii.[i9]24 {Barns), BM slide no. 10351, in BMNH. 



Paratypes. Democratic Republic of the Congo: i <$, data as type; 1 J, 

 Udamba, Kuila River (Bousfield); Zambia: i <$, Mwinilunga, Ksombosombo R., 

 29. iv. 1963, in NMR. 



Material not included in the type-series. Gabon: i <$, Fernan Vaz, Lake Asebbe, 

 i.[ig]o8 (Ansorge). 



Group 2 



Species in this group have various modifications of the gnathus but never have the 

 peg-like structure found on the gnathus of species in Group 1. There is a tendency 

 for species in Group 2 to have the arms of the gnathus not meeting in the middle but 

 some species have a gnathus with an enlarged median process. Of the species in this 

 group, S. nigranalis is a peculiar species with a number of characters in the genitalia 

 not shown by the other species. Eventually this species will probably be placed in a 

 separate genus or subgenus when information on species in other regions is available. 

 For the present, however, nigranalis fits into the definition of the genus given on 

 page 66. In Group 2 the first separation (as in Group 1) is based on the fusion or 

 otherwise for part of their lengths of Sc + R x and Rs. All the species (except 

 nigranalis) in Group 2 have R 2 to R 5 from the cell in the fore wing. Interfacetal 

 hairs are present in some species in the group. 



The V IN DICTA -Group 



This species-group contains S. vindicta, S. ramosa and S. guttistigma. It is sep- 

 arated from the other species-groups in Group 2 by the separation of Sc + R-^ and 

 Rs in the hind wing (fused for part of their length in the other species-groups). S. 

 guttistigma differs from the other species in the vindicta-group in having interfacetal 

 hairs and tarsi with only paired apical spines, all the others have rows of spines on 

 the tarsi. S. ramosa and S. vindicta are very similar externally but the genitalia are 

 very distinct. 5. guttistigma has several characters similar to S. eguttalis in Group 1 

 but the genitalia are distinct. 



