1910.] FOSSORIAL WASPS OF AUSTRALIA. 267 



pi'onotum, the mesopleurre showing a distinct dorsal surface 

 on each side of it. Median segment twice as long as the breadth 

 at the base, flattened above and slightly broadened from the 

 base to the apex. Abdomen shining, shallowly and finely punc- 

 tured, the punctures elongate ; first segment vertically truncate 

 at the base, not very short, not very narrow at the base ; the 

 pygidium pointed. The abdomen is broadened in the middle, 

 not cylindrical. 



Entirely castaneous brown. 



Length 5 mm. 



Hah. Woodford, N.S.W. (G. A. Waterhouse), <$ $ in cop. 



Described from two pairs. 



Nearest to vitripennis Sm., but the clypeus of the male is 

 without the triangular truncation at the apex, and the abdomen 

 of the female is shorter and less cylindrical, in addition to other 

 differences. 



Tachynomyia disjuncta, sp. n. 



<S . Clypeus narrowly produced and truncate at the apex, very 

 coarsely punctured, the apical margin smooth. Cheeks at the 

 base of the mandibles produced into an acute spine. Head 

 rugose ; the interantennal prominence very broadly rounded 

 and feebly bilobed, divided by a short, obscure, longitudinal 

 carina. Antenna* as long as the head, thorax, and median 

 segment combined, inserted nearer to each other than to the 

 eyes, the apical joints slender and arcuate. Ocelli very close 

 together, the posterior ocelli about three times as far from 

 the eyes as from each other ; the head strongly concave beneath, 

 the lateral fringe of hairs very long and grey. Apical joints 

 of the maxillary palpi not very long or slender. Posterior 

 margin of the head slightly arched, not emarginate. Pronotum 

 shining, almost smooth, much narrower than the head, the 

 anterior margin raised. Thorax and median segment closely 

 punctured, finely on the median segment, more strongly on the 

 mesonotum ; the scutellum large, broadly truncate at the apex. 

 Abdomen broadened from the base, closely and deeply punc- 

 tured, much more sparsely on the ventral than on the dorsal 

 surface; the second ventral segment very deeply separated from 

 the first and produced at the base into a large and prominent 

 tubercle. Hypopygium broadly rounded, with an acute apical 

 spine. 



Black ; the mandibles, the apex of the clypeus, and the apex 

 of the interantennal prominence very narrowly whitish yellow ; 

 the apex of the tegulse, the apex of the femora, the tibise, 

 tarsi, the second and third ventral segments, and the apical 

 margin of the first, second, and third dorsal segments very 

 narrowly dark ferruginous. Wings hyaline, very faintly clouded 

 with fuscous, nervures black, stigma fuscous. 



Length 14 mm. 



2 . Head rather thick, subrectangular, more than half as 



