177 
S. tridipennis is of smaller size, its labrum is yellow, its 
antennae are uniformly yellowish except the two basal joints, which 
are brownish. Vertex pale with a blackish, deep, Y-shaped impression. 
Metathorax and abdomen straminous. Forewings iridescent, faintly 
Jellowish tinged. The anal apendages of the male are different in 
shape from those of $£. jutlandica. 
Rapisma magna n. sp. 
Head greyish yellow, comparatively small, retracted under the 
prothorax. Antennae yellowish brown, pale brownish haired, sub- 
moniliform; the tip of basal joint blackish (the apex of the antennae 
is broken off). The labrum with acute front angles and incised 
front margin. A blackish streak along the inner margin of the 
eyes, Prothorax about thrice as broad as long, front angles rounded. 
Thorax and abdomen robust, greyish brown, yellowish brown haired. 
Legs yellowish brown, yellowish haired. Basal joint of hind tarsus 
almost as long as fifth joint, second joint a little longer than third, 
fourth the shortest one; second, third and fourth united as long 
as fifth. Claws strongly broadened at the base. Genital plate of 
the female at base as broad as the segment, rounded towards apex, 
longitudinally cleft in the half of its length. Forewings rather broad 
and with acute apex, somewhat coriaceous, pale greyish green with 
& faint brownish tinge. Nervures a little darker than the membrane. 
Costal area very broad at the base, where it projects on each side 
of the prothorax and the head; moderately broad towards the apex. 
The veins in the area forked and anastomosed, and at the base is 
found a recurrent vein. Subcostal area with several cross veins. 
One radial sector which emits six or seven forked branches. Media 
forks near base; second branch of the media forks half the way 
of its length. Cubitus forks nearer the base than media; both of 
its branches are forked. All the cellules in the forewings are 
quadrangular, except some irregular ones in the costal area, and 
except all those in the area between the cubital branches which 
åre pentagonal. Hindwings more hyaline than the forewings, the 
Vidensk. Meddel. fra Dansk naturh. Foren. Bd. 66. 12 
