390 Mr. F. Sunith’s Descriptions 
the joints black ; abdomen with the fourth and following segments 
black; the fourth with two transverse ovate yellow macula, the 
fifth with two minute spots; beneath black. 
Hab. Swan River. 
Genus Aivurus. 
Atlurus agilis. 
JE. niger; capite thoraceque ferrugineo-variegatis ; abdomine 
ferrugineo, segmento primo nigro; alis hyalinis, nervuris 
nigris. ' 
Male. — Length 6 lines. 
Black ; the clypeus, the scape in front, and the mandibles, fer- 
ruginous; the cheeks with a long cinereous beard; the head 
closely and coarsely punctured. The thorax beneath, the legs, a 
large macula beneath the wings, and the pro- and meso-thorax 
ferruginous, the latter with an oblong black patch extending from 
its base to the apex; the scutellum ferruginous; the post-scutellum 
yellow; the sides of the metathorax clothed with long cinereous 
pubescence ;_ the wings hyaline, the nervures black; the legs 
more or less black or fuscous above; abdomen ferruginous, with 
the basal segment black; the thorax is coarsely punctured, the 
abdomen with distant shallow punctures, except the basal seg- 
ment, which is closely and finely punctured. 
Hab. Swan River. 
Genus RHAGIGASTER. 
Rhagigaster simillimus. 
R. niger; macula sub alis abdominisque segmentis duobus api- 
ealibus ferrugineis; tibiis tarsisque testaceis. 
Male.—Length 8 lines. 
Black; head and thorax rugose and covered with short cinereous 
pubescence; a large oblong ferruginous macula beneath the 
wings, which are hyaline, their nervures black; the tibiae and 
tarsi rufo-testaceous, with the claw joint fuscous; abdomen 
black and shining, the two apical segments ferruginous, the tip of 
the ultimate one black. 
Hab. Swan River. 
Rhagigaster flavifrons. 
R. niger; capite antice flavo ; thorace ferrugineo. 
Female.—Length 8 lines. 
Black; the head distantly and finely punctured; the anterior 
portion of the head as high as the vertex of the eyes, and the 
