310 PERCY SLADEN TRUST EXPEDITION 
short and stout, back long and stout, hind femora with lower row on distal third; very 
stout spur on middle tibia. Legs all bristly ; front tarsi distinctly flattened. 
Wings, as Fig. 2, slightly infuscate, especially round the distal 2ths of the 2nd vein. 
Halters with infuscate heads and yellow stalks. 
Abdomen similar to the thorax, clothed with black bristly hairs, a small pair of 
scale-like appendages are visible, somewhat remote (vertically) from the tip. 
Males only were present. 
Size 3 mm.; wing, 24 mm. 
Localities. Seychelles. Silhouette: Mare aux Cochons plateau, over 1000 feet, IX. 
1908. Mahé: Cascade Estate, ca. 800 feet, 1908—9. 


Fig. 2. Heteromeringia nigrifrons, n. sp. x 30. 
3. LHeteromeringia mgriceps, n. sp. 
Two specimens, one ¢ and one ?, were present, which were practically identical 
in their principal structural details with the previous species. The differences 
in colour are, however, very marked, and in default of evidence of dimorphism 
in the males it is thought best to describe them as a distinct species, at least 
provisionally. 
$ Head. The face is entirely black instead of yellow, so that there is no pale colour 
at all on any part of the head, except that the lower eye-margins are slightly orange in © 
some lights. The tip of the third antennal joint is blackened: only the extreme tip of 
the palpi is orange. 
Legs. The whole of the front femora, except the extreme tips, is black : the mid and 
hind femora have, basally, a slightly darkened ring. 
The ? has the same differences in the head colours but the front femora are only 
blackened at the tip, and the others have no rings. 
Size as last species. 
Locality. Seychelles. Mahé: Cascade Estate, 800 feet or over, 1908—9. 
ALLoMETOPON Kertész, Ann. Mus. Nat. Hung., iv. (1906), p. 320. 
A single specimen, in a rather battered condition, can be referred with practical 
certainty to this genus. The genus was described from a New Guinea species. 
