Mr. R. E. Turner on Fossor'ud ffi/nienoptt^ra. 123 



Family PsaminocharidaB. 

 Datozonus tricolor, Sm. 



Pompilus tricolor, Sm. Trari3. Ent. Soc. London, p. 242 (18G8). (J . 

 Poinpilus trichrous, D. T., Cat. Ilyni. viii. p. 327 (1897). J. 



2 • ^^igra ; capitc, antennis, segraentis abdominis quatuor analibus, 

 segraento dorsali sccuudo vel toto vel diniidio basali, femoribus 

 anticis, tibiis tarsisque aurantiacis ; alia aurantiacis, apice 

 infuraatis, venis testaceis. 



Long. 20-24 mm. 



? . Clypeus transverse at the apex, closely and minutely 

 |/uncturetl, witU a tew lar<^er punctures intermingled, the 

 apex of the lahrum exposed. Second joint of the flagellum 

 nearly half as long again as the third ; eyes separated on the 

 vertex by a distance equal to the length ot" the third joint 

 of the flagellum. Pronotum broadly arched posteriorly, not 

 angulate ; scutellum strongly convex. Median segment 

 longer than the apical breadth, without sulcus or stria?, 

 clotli<-'d with short fuscous hairs. Sixth dorsal segment 

 punctured, sparsely clothed with long black hairs. Basal 

 ji)int of fore tarsus with three spines ; ungues of the fore 

 tarsi bifid, of the intermediate and hind tarsi unidentate. 

 Second abscissa of the radius nearly half as long again as 

 the third, the first recurrent nervure received beyond three- 

 quarteis from the base of the second cubital cell, second a 

 little beyond the middle of the third cubital cell. Cubitus 

 (if the hind wing oiiginating at a distance before the trans- 

 verse median nervure equal to about three-quarters of the 

 length of the third abscissa of the radius. The fuscous 

 apical margin of the wing does not extend to the third 

 transverse cubital nervui'e. 



//(///. Adelaide, 8. A. (iS'//i<fA), ^ ; Mackay, Q. [Turner),^ ; 

 Tuwnsville, Q. {Dodd), ? . 



Ihe sexes are exceedingly different, as is usual in this 

 genus, but the neuration is similar. This is the Australian 

 representative of the Indian B.unifascialus, Sm., from wiiich 

 it differs in the colour of the thorax and abdomen, and in the 

 slenderer median segment of both sexes, also in the longer 

 second joint of tiie flagellum in the male. The group, which 

 includes Ji. fuliginosus Klug, and B. madecassus, Sauss., is 

 distinguished from other species of the genus by the great 

 distance between the cubitus and transverse median nervure 

 of the hind wing. 



