D rag onflies from Sierra Leone. 217 



tlivee lateral lines : (1) a little in front of metastigma, 

 (2) across metastigmn, (3) on second lateral suture. Ventral 

 surface dull ferruginous, with tliin whitish pruinosity. Legs 

 black, first femora yellow internally, second and third femora 

 greenish brown in basal half. Abdominal segments 1-3 in- 

 flated, almost spherical (but rather considerably smaller than 

 in africanuni) ; 4—10 very slender, j)arallel. Segment 1 dull 

 greenish, obscure dorsally ; 2 simihir, but daik lining of 

 carinse broader and confluent in posterior half c£ dorsum ; 

 1-6 black, on each side, slightly behind tlie middle, a yellow- 

 spot, distant by about its own length from end of segment 

 and not fully touching mid-dorsal carina; 8-10 wholly 

 black. Ventral surface 1-3 dull greenish, with carinse nar- 

 rowly black ; 1-8 black, with submedian yellowish spot, large 

 on 1, successively smaller posteriorly. Genitalia of second 

 segment : anterior lamina moderate, depressed ; convexity 

 of basal part flat, with many minute black spines; a very 

 small notch at end. Hamule small ; internal branch a robust 

 triangular hook, but slightly curved sidewards, \QYy little 

 higher than anterior lamina ; external branch appreciably 

 shorter, separated by a narrow incision of very moderate 

 depth, broadly rounded. Lobe large, almost circular in 

 outline. 



Wings slightly stained with greyish from the triangular 

 region outwards; minute vestige of yellow in.cu. of hind 

 wings. Membranule black. Pterostignia dark ferruginous, 

 between strong black veins. Venation wholly black ; only a 

 very narrow dull yellowiah line at the costa anteriorly. Ar- 

 culus a little distal to Anq. 2. Anq. 13 . 13 ; t. ^ ; ht. J-^ ; 

 1 row E,s.-Rspl. Abd. 30, hw. 30, pt.<3, length of fourth 

 segment 5 mm. 



$ . — Almost entirely similar to male in shape, colour, and 

 pattern. Lateral brownish lines of thorax lighter and nar- 

 rower. Abdomen but little more robust ; foliaceous dilata- 

 tions of segment 8 very narrow; vulvar scale not visible. 

 Appendages black, very acute ; supra-anal tubercle and sub- 

 anal valves light yellowish. 



Minute vestige of yellow in cu. and in anal area of front 

 wino-s, slightly more yellow in hind wings : vestige in sc, in 

 cu. halfway to Cuq., one cell at membranule. Anq. 11 . 15 ; 

 doubled cells in lis.-Rspl. gToJ venation otherwise as in 

 male. Abd. 29, hw. 30, pt. 3, length of fourth segment < 5. 



Cyanothemis, gen. nov. 

 Facies of Hadrothemis, but differing in the position of the 



