Species o/'Ccriagrlon /Vo/jj West A/ri'cti. 281 



KoUer (Congo Museum, Ti-rvueren, I>nis:>el.s). 1 owe this 

 record to tlie kindness of Dr. Uis, who has compared tlie 

 (Jon<;() pair with Dr. Simpson's series from iSicrra Leoncj 

 iind found them to be identical. 



Ceriagri'on ignitum, sp. n. 



(^ adult (holotype). — Length of abdomen (including anal 

 ap|)endages) 24 mm. ; length of hind wing 15 mm. 



Labium brownish white. Labrum and anteciypeus red- 

 disli brown. Postelypeus and frons above dark brown. 

 Gen£e and anterior portion of frons greenish. Antennae, 

 upper surface of head, prothorax, and most of thorax proper 

 dark chocolate-brown, tending to copper colour in places. 

 A broad golden-brown band below the humeral suture. 

 Under surface of thorax and bases of legs with bluish-white 

 jjruinosity. Legs pale brown, wltii black spines and a little 

 black on the tarsi and claws. Wings entirely hyaline ; 

 reticulation black. Arculus a little distal to the level of the 

 second antenodal in all wings. A* separating at (hind wings) 

 or a tritle before (fore wings) the level or tiie cubito-anal 

 cross- vein. Postnodals 10— 12 in fore win^s, 9 in hind \vinof~. 

 Pterostigma greenish brown, jjaler round the edges. Seg- 

 ment 1 of abdomen yellowish ; 2 to 6 crimson, passing to 

 orange-red on segments 7 to 10; intersegmental sutures 

 black; ventral surface for the most part orange-red. Apical 

 margin of 10 not deeply excised, the emargination with a 

 somewhat elevated border. Anal appendages brownish red, 

 viewed in profile slightly convergent ; the upp^r pair a little 

 shorter than the lower, rather slender and sharply pointed, 

 and curved inwards and downwards. Lower appendages 

 about as long as segment 10, stout, curving inwards and 

 upwards, and ending above in a long black claw. 



Much like the male of the European Pyrrhosoma tenellum^ 

 Vill., but the abdomen is more richly coloured and the wings 

 are narrower and more hyaline than in that species. 



? adult (allotype). — Length of abdomen 22 mm.; length 

 of hind wing 16 mm. 



Labium yellowish. Labrum yellowish, with a trace of 

 red. Genaj pale green. Anteciypeus, postelypeus, and ante- 

 rior portion of frons dark green. Frons above, antennse, 

 prothorax, and upper surface of head dark chocolate-brown. 

 Dorsum of thorax proper dark chocolate-brown, with an ill- 

 detined golden-brown line on each side of the mid-dorsal 

 crest. A broad golden-brown band below the humeral 

 suture. Sides of thorax greeuiah. Under surface of thorax, 



