CHELOSTOMA. 
285 
wings with two submarginal cells nearly equal and a third 
commenced; the second receives both the recurrent 
nervures, the first beyond its commencement and the 
second before its termination; legs shortish, subsetose, the 
anterior spurs short, broad, and emarginate at the apex; 
the posterior plantae with a compact dense brush within; 
claw-joint long; claws simple. Abdomen longer than 
head and thorax, subclavate, convex above, retuse at the 
base, and the apical segment obtuse at its extremity, the 
venter flat, its segments clothed from the second with 
dense parallel brushes of longish hair for the conveyance 
of pollen. 
The male differs in having the head less conspicuously 
globose; the cheeks less protuberant; the whole body 
more pilose, the anterior spurs robust, short, and abruptly 
obliquely truncated; the antennae slender, filiform, much 
longer than in the female, but not much longer than the 
head, and from the fourth to the ninth joints serratulate 
within, adapting it to a sharp curve; the abdomen being 
equal, cylindrical, retuse at its base, convex above, and 
flat on the venter, where it has a longitudinal deeply 
concave mucro in the centre of the second segment, 
which concavity runs along all the subsequent segments, 
and it is densely pilose on the fourth; the terminal 
dorsal segment being deeply emarginate in the centre 
and produced on each side into a broad obtuse pro¬ 
cess; the claws are more robust than in the female and 
bidentate; the posterior pair being subclavate, and their 
single tooth abruptly reflected. 
NATIVE SPECIES. 
1. flofisomne, Linnaeus, d ? . 3-5 lines. (Plate 
XIII. fig. 2 (? ? .) 
