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



Male. — Head with the vertex, the strongly bifid frontal 

 tubercle, the occipital triangle, extremity of labrum, and a 

 broad central band on the labrum black ; hinder orbits yellow? 

 with one or two brown transverse spots; frontal shield 

 greenish, strongly punctured ; the rest of the face (except fo 

 the black markings already described) yellowish. Prothorax 

 yellow, with a brown transverse band, narrowed in the middle. 

 Mesonotum yellow, with brown and blackish markings ; the 

 front transversely black, with a transverse yellow mark in the 

 middle ; a median dark central band, with two yellow lines 

 near the centre and a dark shoulder-stripe, not reaching the 

 hinder lappets, which are yellow, enclosed by black carinae. 

 Interalary spaces black, spotted with yellow in the middle, and 

 with a yellow spot at the base of each wing. On the yellow 

 pleura, below the shoulder-stripe, are five more black or 

 brown bands on or between the sutures, the first double above. 

 The metapectus is enclosed by almost a square of black 

 carina?, the hindermost detached, and slightly curved. Legs 

 black ; femora more or less testaceous. Abdomen black or 

 pruinose blue, with all the carinse black, the first three 

 segments with yellow markings, separated by the carinse and 

 by dark hind borders, and a lateral stripe ; the three following- 

 segments with a broad subbitid spot on each side in the 

 middle, the rest black. On the under surface these pale 

 lateral markings are more extended. Anal appendages yellow, 

 upper ones slender, as long as the ninth segment, the extreme 

 tips black; lower appendage truncated at the extremity, 

 nearly as long as the upper ones, and with a black carina 

 beneath on each side. Appendages of the second segment 

 large. Wings hyaline, with black nervures ; fore wings with 

 13-15 antenodal and 11-12 postnodal cross-nervures. Ptero- 

 stigma black, with a yellow transverse central line. Mem- 

 branule blackish, with a white spot at the base : hind wings 

 smoky yellow at the extreme base, the sectors of the arculus 

 subcontiguous at the base. 



Female similar, with the lines on the pleura darker and 

 broader. Abdomen with the testaceous spot on the under 

 surface of the seventh segment expanded to the sides far 

 enough to be visible above ; eighth segment perfoliate. 

 Anal appendages yellow, longer than the tenth segment, which 

 is also yellow. Wings clouded hyaline, with black nervures ; 

 14-17 antenodal and 11 postnodal cross-nervures. 



Abdomen similar in both sexes, much inflated at base, 

 slightly constricted behind the third segment; the rest of the 

 segments rather broad ; the fourth about three times as long- 

 as broad, widening at the extremity ; the rest subparallel, 



