492 MR. K. E. TURNER ON [May 12, 



inserted almost as far from each other as from the eyes, short and 

 rather stout ; the second joint of the flagellum not much more 

 than twice as long as the first, and about equal to the third in 

 length but not quite as thick, the fourth and fifth joints as long 

 as the third. Eyes separated on the vertex by a distance about 

 equal to the length of the third and fourth joints of the flagellum 

 combined. Head shining and almost smooth, a A-ery delicate sulcus 

 reaching from the anterior ocellus almost to the base of theclypeus. 

 Posterior ocelli ovate, with a small deep dejjression behind them, 

 from which a rather deep sulcus runs to the posterior margin of 

 the head. Thorax narrower than the head, smooth and shining ; 

 the pronotum depressed below the mesonotum, gradually but not 

 very steeply sloped ; the mesonotum with a longitudinal sulcus on 

 each side, and a very short longitudinal sulcus from the middle of 

 the anterior margin. Median segment opaque, shorter than the 

 mesonotum, abruptly but not quite vertically trimcate posteriorly, 

 the face of the truncation finely transversely striated, with a deep 

 median sulcus not reaching the apex. Abdomen almost smooth, 

 the ventral surface highly polished ; the segments depressed on 

 the apical margin, the three basal segments very strongly so and 

 much more broadly on the middle than on the sides, the second 

 segment obscurely transversely furrowed before the depression ; 

 the margins of the three basal segments with scant Avhite 

 pubescence (probably thicker in fresh specimens) ; the pygidial 

 area shining and sparsely punctured, very long and nariow, 

 almost pointed at the ajiex. The comb on the anterior tarsi well 

 developed. The radial nervure reaches nearer to the outer margin 

 of the wing than the cubital ; the first recurrent nervure is 

 received nearer to the second than to the base of the second 

 cubital cell. 



Black ; the flagellum fuscous, the apex of the scape beneath 

 fusco-ferruginous ; tarsi fuscous at the base, the apical joints 

 fusco-ferruginous ; the comb of the anterior tarsi ferruginous. 

 Wings hyaline, tinged with fuscous ; nervures black. 



Length 11 mm. 



Hah. Adelaide, S. Australia. 



Type in British Museum. 



Somewhat allied to T. nigerrimus from New Zealand, but the 

 thorax is narrower in proportion to the head, and the antenna? 

 are very difl:erent. 



Tachysphex hypoleius Sm. 



$ . Clypeus slightly convex, depressed towards the anterior 

 margin, which is bi'oadly subtruncate, very minutely punctured. 

 Antenna; inserted further from each other than from the eyes, 

 the space between them shining and almost smooth, above the 

 shining space is a very short longitudinal carina with a very small 

 tubercular prominence on each side of it. The first joint of the 

 flagellum very short, not more than one-quarter of the length of 

 the second, the second and third about equal in length, the fourth 



