S92 PERCY SLADEN TRUST EXPEDITION. 
Abdomen as long as the head and thorax united ; its first segment twice longer than 
it is wide at the apex; the central part closely finely striated, the striz intermixing; 
before the apex depressed, with a stout keel on the sides and a stouter one down 
the middle, the following three segments closely strongly striated ; the area on second 
segment closely striated, followed by a large, wider than long, depression, separated in — 
the middle by a sharp keel; a roundly curved keel on either side, leading from the base 
to the suturiform articulation, which is wider than usual, especially in the middle, and 
with widely separated stout strize ; the oblique lateral depression is wide and shallow; the 
apices of the second, third, and fourth segments are narrowly smooth, raised; there is a 
narrow obscure furrow on the apex of the fifth. The second cubital cellule is twice longer 
than wide; there is a small, distinct, triangular cloud at the apex of the recurrent 
nervure below the cubitus. Temples wide, as long as the eyes, broadly rounded, slightly 
narrowed behind. Face coarsely, transversely, rugosely punctured, sparsely covered with 
long black hair. Mandibles yellowish at the base. | 
AGATHIDIN A. 
26. Megagathis testacea, sp. nov. 
Testaceous, darker towards the apex of the abdomen; the antennze, apex of hind tibiee, 
and the hinder tarsi black; wings hyaline, the costa and stigma black, the nervures 
yellowish testaceous. 2. 
Length 7 mm.; terebra 1 mm. 
Localities. Seychelles, Coetivy. 
Face closely and strongly punctured, especially above; the clypeus more weakly 
punctured, its apex smooth, as is also the broadly rounded large labrum. Front and 
vertex smooth, the former bordered by a curved keel. Ocelli large, reddish as in Ophion 
and other nocturnal forms; the anterior smaller than the two posterior. Eyes large, the 
malar space as long as the thickness of the antennal scape. Temples very short, 
narrowed. Mesonotum trilobate, closely strongly punctured; the middle lobe with a 
narrow furrow down the middle, Scutellar depression with three stout keels. Seutellum 
raised, strongly punctured; the postscutellum bordered by roundly curved keels 
meeting at the apex, where they are raised. Metanotum with a central area, widened in 
the middle, gradually narrowed to a sharp point at the base and apex; in the centre are 
two widely separated stout keels; the base laterally is irregularly areolated, on the apex, 
side by side, are two large squarish areze ; there is a keel outside the linear spiracles; the 
metapleuree closely rugosely punctured. Propleursze smooth; the mesopleuree closely, 
but not strongly punctured; the metapleurw irregularly rugosely striated, punctured. 
Abdomen smooth, shining, bare ; its first segment three times longer than it is wide at the 
apex ; the latter twice the width of the base, which has a triangular depression. Ovipositor 
curved. Radial cellule long, narrow, reaching to the apex, the areolet 4-angled, narrowed 
in front but with the nervures widely separated; the transverse median nervure placed 
shortly behind the transverse basal. The long spur of the hind tibiz two-thirds of the 
length of the metatarsus. 
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