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A KEY TO THE AFRICAN SPECIES OF THE GENUS DICRANOPTYCHA 



OSTEN SACKEN. 



i. General coloration dark brown or black; legs black or brownish 



black; wings strongly suffused with brown. 2 



General coloration yellow or light brown; legs yellow (broken 



in confluens); wings suffused with grayish yellow or pale brown. 3 



2. General coloration deep shiny black, this color including the 

 coxae and trochanters; vein M3 beyond cell ist Mi, longer than 

 this cell; size large (wing about 12 mm.). (Uganda). 



D. atricolor Alex. 



General coloration dark brown, the coxae brown, the tro- 

 chanters yellow; legs dark brown, the fémoral bases paler; vein Ms, 

 beyond cell ist Mi shorter than this cell; size smaller (wing less than 

 9 mm.). (Natal). D. natalia Alex. 



3. Wings with cell ist Mi open by the atrophy of the outer de- 

 flection of M3. (Nyasaland). D. confluens, sp. n. 



Wings with cell ist Mi closed. 4 



4. Legs with the tips of the femora narrowly but distinctly dark 

 brown. (Tanganyika Territory — Nyasaland). D. trochanterata Speis. 



Legs with the femora entirely clear yellow. (Nigeria). 



D. îuteipes, sp. n. 



Dicranoptycha Iuteipes, sp. n. 



General coloration brown, the pleura and posterior sclerites of 

 mesonotum pruinose; pronotum and humerai région of praescutum 

 brownish yellow; antennal segments bicolorous; legs clear light 

 yellow. 



Maie. — Length 7.6 — 8 mm.; wing 8-8.5 mm - 



Female. — Length 9.5-10 mm.; wing 9.5 mm. 



Rostrum and palpi dark brown. Antennae with the scape brown; 

 flagellar segments bicolorous, each being yellow with a narrow brown 

 ring immediately beyond the base at the widest part of the fusiform 

 segments. Head dark brown, the anterior part of the vertex and the 

 front brighter. 



Pronotum brownish yellow, the praescutum dark brown, with the 

 cephalic margin and humerai triangles conspicuously brightened; 



