324 PERCY SLADEN TRUST EXPEDITION 
middle of cell; the distance between cross veins on 4 slightly longer than abbreviated end of 5 
beyond the last cross vein. Discal cross vein about half length of last one. Halters yellow, 
brown stalks. Legs all yellow except the darkened terminal two or three tarsal joints. 
Front pair (Plate 19, fig. 11):—femur with a hump on middle carrying two large and several 
small thorns, proximally two stout spines and smaller one, a few hairs behind these ; bristly 
on tip, one bristle near distal one-third is bigger: tibia bent and distorted, proximally three 
bristles, then a small hump with four bristles on it. When viewed in profile, the ventral 
side of tibia is seen to be excavated, principally near the hump, so that it can receive the 
femoral hump to a greater or less extent; a minute preapical bristle: tarsi with first joint 
strongly pectinate below, especially at base. Middle pair:—femur with one bristle on outer 
side towards middle ; tibia with three bristles on hind edge (as stretched out) from middle 
towards tip, preapical, two small terminal, one beneath about middle ; tarsi, first two joints 
with double row of side bristles pointing backwards. Hinds legs; femur with one outside 
bristle two-thirds from base ; tibia clubbed in distal half, a ring of three bristles at middle ; 
tarsi as middle legs. 
Abdomen with very humped and knobbed shining yellow second segment, the others 
purplish shining black, with beginning of petiole and end cavity more orange: second 
bristled all over, stronger at side: others with smaller sparser general bristles and large 
bordermg macrochetes. 
Size, about 3 mm. ; wing, about 2 mm. 
Locality. Seychelles. Mahé: Cascade Estate, 800 feet or over, 1908—9; marshes 
on coastal plain of Anse aux Pins and Anse Royale, I. 1909. 
In addition to the above there are a few specimens of the female of a dark species 
with white and black spots on the wing. 
Localittes. Seychelles. Mahé: Cascade Estate, and marshes on coastal plains at 
Anse aux Pins and Anse Royale, 1908—9. 
Micropezide. 
Neretus Fabricius, Syst. Antl., 264 (1805). 
23. Nereius alluaudi Giglio-Tos, Ann. Soc. Ent. France, lxiv. (1895), p. 366. 
There is a long series of a species of Nereiws which agrees well with the description of 
this Seychelles species. Giglio-Tos says that one of his specimens had three longitudinal 
lines of which the middle was much narrower. All the present specimens possess the three 
lines, the two outer and broader ones of which extend from the calli to the scutellum: the 
middle one is much narrower and only extends about half-way down the dorsum. The 
breadth of the lines varies somewhat in the different specimens. 
Localities. Seychelles. Silhouette: near Mont Pot-a-eau, ca. 1500 feet, VIII. 1908; 
Mare aux Cochons and forest above, over 1000 feet, IX. 1908. Mahé: Forét Noire 
district, and high forest of Morne Blane and Pilot, X.—XI. 1908; Cascade Estate and 
forest above, ca. 1000 feet and over, 1908—9; Mare aux Cochons district, 1000—2000 
feet, L—II. 1909; 1905 (Gardiner) ; 1892 (Alluaud). 
This species is very characteristic of the damp endemic mountain-forests, throughout 
which it is found. 
