1908.] AUSTRALIAN FOSSORIAL WASPS. 491 



Tachysphex pacificus, sp. n. 



5 . Olypeus very broadly truncate at the apex, strongly and 

 closely punctured at the apex, sparsely and more finely at the 

 base. Antemife inserted as far from each other as from the eyes ; 

 the second jomt of the flagellum three times as long as the first 

 and about one-third longer than the third, the fourth and fifth 

 almost equal in length to the third ; the distance between the 

 eyes on the vertex equal to the length of the second joint of the 

 flagellum ; the posterior ocelli elongate-ovate, situated on a very 

 feeble elevation, a small depression on the vertex behind them. 

 Head subopaque, closely and finely ]3unctured, with a delicate 

 longitudinal sulcus on the front. Thorax shining, very closely 

 and minutely punctui'ed ; scutellum smooth and shining. Median 

 segment opaque, very finely shagreened, the apex shining, almost 

 vei"tically truncate posteriorly ; the face of the truncation finely 

 transversely striated, with a delicate median sulcus. Abdomen 

 smooth and shining, the apical margin of the segments broadly 

 and feebly depressed, the apical segment triangular, the sides 

 longer than the base, sparsely punctured. The comb on the 

 anterior tarsi is composed of very few setae. The third cubital 

 cell is strongly produced towards the margin of the w^ing, being 

 nearly four times as long on the cubital as on the radial nervure. 

 The sides of the median segment are obliqtiely striated. 



Black ; the mandibles and tegulse fuscous. Wings hyaline, 

 faintly tinted with fuscous ; nervui-es black. 



Length 8 mm. 



Hah. Melbourne. 



Type in British Museum ex coll. Smith. 



Near T. dehilis described above, but the proportion of the joints 

 of the antennae is very different, and the thorax and abdomen are 

 more polished, and the sculpture, especially on the sides of the 

 median segment, is different. 



Tachysphex nigerrimus Sm. 



Tachytes nigerrimus Sm. Cat. Hym. B. M. iv. p. 302. n. 26, 

 1856. 



Aetata nigerrima White ; Butler, Zool. Voy. Ereb. & Terroi", ii. 

 pi. 7. fig. 14, 1875. 



Hab. New Zealand. 



I have received a specimen said to be from Yictoi-ia, but the 

 locality may be a mistake. 



Smith took the name from White's MS. referring to the above 

 work, of which the portion containing the Hymenoptera was not 

 published till many years later. 



Tachysphex pugnator, sp. n. 



5 . Clypeus shining and sparsely punctured, convex, strongly 

 depressed, and bent inwards on the apical margin, giving the 

 appearance of a wide and shallow emargination. Antennae 



