226 NATURAL HISTORY SOCIETY OF DUBLIN. 
Head blackish above, the back of the eyes pruinose; an enlongated 
livid mark on each side parting from the antenne and directed towards 
the occiput. 
Prothorax blackish, the base and a lateral border at the median 
lobe yellow; posterior portion without spots. 
Front of the thorax bronzy-black as far as the lateral sutures, hav- 
ing in front, against the prothorax on each side of the dorsal keel, a 
yellow cuneiform spot; a blue humeral line not descending beneath ; 
sides bluish, with an undulated black band at the second lateral suture. 
Underside livid. 
Abdomen long and slender ; sides of the first segment broadly bluish ; 
a vestige of a pale interrupted basal ring at the dorsum on the third to 
the sixth segments. 
Legs livid, with long brown ciliations; exterior of femora and in- 
terior of tibie blackish. 
é. Posterior lobe of the prothorax rounded; rhinarium, internal 
margin of the eyes, cheeks, and upper lip blue, the latter finely bor- 
dered with black; sides of the eighth to the tenth segments bluish, the 
latter very short. 
Anal appendices—superior brown, longer than the tenth segment, 
slightly thickened at the base, distant, afterwards compressed and 
somewhat curred inwards and downwards towards the apex, ciliated ; 
inferior dull, thickened and contiguous at the base, afterwards drawn 
out at the extremity into two points suddenly straightened, somewhat 
distant at first, afterwards approaching each other, and at last slightly 
divergent. 
¢. Posterior lobe of the prothorax deeply divided by an oval ex- 
cision; rhinarium and upper lip blackish; inner border of the eyes 
and the cheeks yellowish. (The last three segments of the abdomen 
are missing.) 
This species is allied to 7. Dictynna, but very distinct by the two pale 
spots of the front of the thorax being very much smaller, the lateral 
bands more dilated, and the pterostigmalonger. The ? is remarkable 
for the oval excision which divides the posterior lobe of the prothorax. 
The appendices of the ¢ are formed like those of 7. cyanops; only the 
superior are rather more excavated internally, and the inferior rather 
less contiguous before the apex. 
Until the present time the genus Zrichocnemis was known only 
from South Asia and the Malayan archipelago. 
8. Agrion Senegalense, Rambur. 
Two males similar to those of the African continent and islands. 
9. Brachybasis glabra, Brum. (Agrion.) 
Agrion ferruginuem Rambur.—Two males, similar to those of the 
African continent, Madagascar, and Mauritius. 
