Mr, R. E. Turner on Fossorial Hymenoptera. 123 



Family Psammocharidae. 



Batozonus tricolor, Sm. 



PompUtis tricolor, Sm. Trans. Ent. Soc. London, p. 242 (1868). S • 

 Pompilus trichrous, D. T., Cat. Hym. viii. p. 327 (1897). J. 



$ . Nigra; capite, antennis, segraentis abdominis quatuor analibus, 

 segmento dorsali secuudo vel toto vel dimidio basali, femoribus 

 anticis, tibiis tarsisque aurantiacis ; alis aurantiacis, apice 

 infumatis, venis testaceis. 



Long. 20-24 mm. 



? . Clypeus transverse at the apex, closely and minutely 

 punctured, with a io.w larger punctures intermingled^ the 

 apex of the labrum 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 strise, 

 clotlied with short fuscous hairs. Sixth dorsal segment 

 punctured, sparsely clothed with long black hairs. Basal 

 joint of fore tarsus with three spines ; ungues of the fore 

 tarsi bifid, of the intermediate and hind tarsi unidentate. 

 iSecond abscissa of the radius nearly half as long again as 

 the third, the first recurrent nervure received beyond three- 

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

 little beyond the middle of the third cubital cell. Cubitus 

 of the hind wing originating 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 nervure. 



Hah. Adelaide, S. A. (iSmiYA), ^ -, Mackay, Q. {Turner), ? ; 

 Townsville, Q. {Dodd), ? . 



The sexes are exceedingly different, as is usual in this 

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

 representative of the Indiair B. unifasciatus, Sm., from which 

 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 the flagellum in the male. The group, which 

 includes B. 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. 



