Mr. W. F. Kirby on Odonata from Sierra Leone. 69 



Palpopleura Portia. 



Libellula Portia, Drury, HI. Exot. Ent. ii. pi. xlvii. fig. 3 (1773). 

 Palpopleura Portia, K'irb. Cat. Neur. Odon. p. 9. n. 4 (1890). 



5 specimens, Aug. 26 to Sept. 21 (1899). 

 Although long known and widely distributed, this species 

 does not seem to be nearly so abundant as P. Lucia, Drury. 



Trithemis ICalula, sp. n. (PI. II. figs. 2, 2 a.) 



Long. corp. 32—34 millim. ; exp. al. 53-55 millim. ; long, 

 pter. 2 millim. 



Male. — Rufo-testaceous, with hyaline wings. Very similar 

 to T. arteriosa } Burm., from which it differs as follows : — 

 The segments of the abdomen are distinctly shorter and 

 broader, and instead of a row of lateral black spots succeeded 

 by a continuous band, there is a row of lateral black spots 

 enlarging and expanding behind, which are more or less 

 expanded on the last three segments, sometimes so much as 

 to cover most of these segments, except a reddish spot on each 

 side in front. The middle appendages of the same segment 

 consist of a pair of long slender recurved hooks. The neura- 

 tion is brown, reddish only sometimes in the costal and post- 

 costal areas. The yellow shade at the base of the hind wings is 

 darker than in T. arteriosa and the cells in it are usually centred 

 with pale brown. In adult specimens the vertex is violet, and 

 the thorax and abdomen are slightly pruinose, but more of a 

 reddish plum-colour than blue. An immature male (and pre- 

 sumably the female) has a broad brown median band on the 

 thorax, and a narrower one on each side, the latter connected 

 below with a longitudinal black band on the pleura, which 

 emits three oblique brown bands downward, the hindermost 

 connected with a black space, filled up with two pale spots in 

 front and a large transverse one behind on the metapectus. 

 At the base of the abdomen there are also three brown stripes 

 above the level of the lateral markings already described. In 

 the more mature specimens these markings are more or less 

 obscured. Legs black. Pterostigma brown, more or less 

 centred with yellow. 



4 specimens, Aug. 26, Sept. 13, 21 (1899). 



Trithemis serva, sp. n. (Woodcut, fig. 1.) 



Long. corp. 34 millim. ; exp. al. 57 millim.; long. pter. 

 2| millim. 



Male. — Dull black, more or less varied with testaceous in 

 immature specimens, especially on the face ; in the most 



