216 Dr. F. Ris on new 



sc. to Anq. 1, en. to Cuq. 1, 2-3 cells in anal area. Anq. 

 14.14; Cuq. |t|; t. ^5; ti. 1.0; ht. J-j ; Bqs. |^ ; 

 second specimen : Anq. 14(i) . 14 ; Cuq. |^ ; t. ^ ; ti. . ; 

 lit. ^ ; Bqs. 1^ ; in both specimens discoidal area with a 

 single row to near end and not widened. 



5 . — Markings as in male, only there is also an antero- 

 lateral yellow spot on segment 6. Genital segments not in 

 good condition ; they appear scarcely distinct from A. hlingi. 

 Wings rather deeply stained with greyish yellow, especially 

 along the veins ; yellow basal stripes slightly larger than in 

 male. Anq. 15 . 15 ; Cuq. f^J ; t. ?^; ti. 1 . ; ht. \^^ ; 

 Bqs. \^', in discoidal area of front wings on right side one 

 row of cells to the level of the bridge, then two rows ; on 

 left side two cells twice at beginning, afterwards as on right 

 side ; scarcely more widened to wing's edge than in male. 

 Second specimen : Anq. 15 . 15 ; Cuq. ~ ; t. ^'—^ > ti. 1.1; 

 ht. ^ ; Bqs. 1^; discoidal area in front wing, right side 

 two rows from the beginning, left s^ide at first one cell and a 

 half, followed by two rows. 



S. Abd. 21-5, hw. 25, pt. >2. ? . 21, 25, >2. 



Orthetrum sagitta, sp. n. 



1 c?, 1 ?j Sierra Leone, Port Lokko, 2, 3. v. 1912 

 (Dr. J. J. Simpson). 



Nearest to 0. africanum., Selys, but smaller ; abdomen 

 not longer than wings, fourth segment not considerably 

 elongate, not fully 5 mm. (7 mm. in afiicanum); internal 

 branch of hamule considerably higher than external branch 

 (of about equal height in africanum). Antenodal cross- 

 veins black in sc. ; pterostigma dai k ; very slender species ; 

 segments 1-3 much inflated, globose, 4-10 very narrow, 

 parallel ; mostly 1 row of cells E-s.-Hspl. 



^ . — Labium light yellow. Labrum light yellow, very 

 narrowly lined with black at free margin. Face and frons 

 anteriorly light greenish yellow ; frons above obscure oliva- 

 ceous, but narrowly and indistinctly brown at base. Vertex 

 dull brownish. Thorax dull greenish, with fine elevated 

 black points and the following dark lines, black on dorsum, 

 brown and somewhat diffuse at sides: complete and rather 

 broad line at median suture ; about equally broad, dorsally 

 truncate line a little nearer to humeral than to median 

 suture ; complete line at humeral suture, somewhat diffusely 

 invading space between suture and autehumeral black line; 



