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Mesonota] praescutum with a single rather broad blackish 

 médian line on anterior half of sclerite. (Ivory Coast). 



L. africana nigrilinea Alex. 



7. Sise large (length, <f, about 28 mm.; wing about 20 mm.); head 

 and thorax with a narrow, dark brown capillary vitta; wings pale 

 gray with abundant brown and gray dots in ail the cells; legs without 

 pale rings. (Nigeria). L. pluriguttata Alex. 



Size smaller (length, cf, under 20 mm.; wing 18 mm. or less); 

 wings more or less cross-banded with brown, except in reisi and 

 metatarsalba); legs with white or yellowish white rings (in hirsu- 

 tipes, the fémoral bases and the metatarsi are paler). 8 



8. Wing-pattern heavy, consisting of broad cross-bands and often 

 with additional spots and dots in the cells. 9 



Wing-pattern light and more restricted, confined to narrow 

 seams along the cord and other veins. 13 



9. Wings nearly hyaline, with heavy irregular brown crossbands 

 but no additional spots or dots. 10 



Wings with spots and dots of brown in the cells between the brown 

 crossbands. 12 



10. Tibiae brown, without pale rings; a broad seam of brown 

 along vein Cu, Connecting a dark area in the bases of cells R and M 

 with a broad cross-band at the level of the origin of Rs. (Tanganyika 

 Territory). L. hirsutipes Riedel. 



Tibiae dark brown with pale rings; no dark seam along 

 vein Cu as described above. 1 1 



11. Wings with broad brown crossbands that are margined with 



still darker brown; Rs short, not greatly longer than i?2+3; a narrow 



pale postmedial ring on tibiae. (Nigeria). 



L. laticincta Alex. 



Wings with a conspicuous seam at cord but basad of this only 

 a small brown cloud at origin of Rs; Rs very long, more than three 

 times .R2+3; tibiae dark brown, with a conspicuous white basai ring. 

 (Gabon). L. duchaillui, sp. n. 



12. Wings broader, the spots and dots numerous, in ail the cells. 

 (Ashanti, Cameroun, Belgian Congo). L. triacanthos Alex. 



