1910.] FOSSORIAL WASPS OF AUSTRALIA. 299 



anterior margin. Median segment finely and closely punctured, 

 more than half as long as the pronotum, broadened from the base 

 and obliquely truncate posteriorly, the surface of the truncation 

 microscopically punctured. First abdominal segment concavo- 

 truncate anteriorly, the dorsal surface coarsely rugose ; second 

 segment with about nine irregular transverse carina?, including 

 the strongly raised apical margin, the apical carinas much higher 

 than the basal ; segments 3-5 smooth or very delicately aciculate 

 at the base, finely and closely punctured at the apex ; fifth ventral 

 segment coarsely longitudinally striated. Pygidium not very 

 narrow at the base, vertically truncate posteriorly, with about 

 four arched carina? before the base of the truncation, the surface 

 of the truncation elongate oval, smooth, with two arched carina? 

 at the base, the ventral plate extending beyond the dorsal and 

 both rounded at the apex. 



Dark fuscous brown ; head and legs dull ferruginous ; pro- 

 notum and pygidium fusco-ferruginous. 



Length 10 mm. 



Hob. Perth, W. A. (ff. M. Giles), d $ in cop. October. 



" On Stypelia bloom. Rare." (Giles.) 



Very similar to trilobatus in general appearance, but the hypo- 

 pygium of the male and pygidium of the female are very 

 different. 



I am not sure which name has priority for this species. Schulz's 

 description was published apparently late in June, though no date 

 is given ; whereas my diagnosis in the key to the species appeared 

 early in June, though the full description did not appear until 

 August. I feel little doubt that the descriptions refer to the same 

 species, though Schulz does not give any notice of an apical spine 

 on the hypopygium either in the text or the figure ; but this 

 spine is very liable to be broken in many species. The species is 

 in no way connected with Enteles, in which the males always have 

 the apical spine strongly recurved as in lihagig aster . 



Zaspilothynnus lignatus, sp. n. 



6 . Olypeus strongly convex, coarsely punctured, with a low 

 median carina not reaching the apex, produced and rather broadly 

 truncate at the apex, the apical margin obliquely depressed and 

 smooth ; labrum prominent, broad and feebly bilobed. Head 

 closely punctured-rugose, the interantennal prominence rounded 

 at the apex ; antenna? a little longer than the thorax and median 

 segment combined, the apical joint more slender than the others. 

 Thorax finely and very closely punctured ; the pronotum nearly 

 as broad as the head, the anterior margin slightly raised ; 

 scutellum subtriangular, narrowly truncate at the apex. Median 

 segment short, very finely punctured-rugulose. Abdomen elon- 

 gate, tapering slightly at the extremities, very finely and closely 

 punctured ; the segments very feebly constricted at the base, the 

 first dorsal segment with a tubercle at the base, the sixth segment 

 more sparsely and coarsely punctured ; the seventh defiexed, very 



