AUSTRALIAN FOSSORIAL WASrS. 61 



second ; the third cubital cell receiving the second recurrent 

 nervure at a distance from the base equal to about one-fourth of 

 the length of the second transverse cubital nervure. 



Hob. Yallingup, S.W. Australia ; September. 



In addition to colour, the rounded apex of the clypeus 

 separates this from other species of the genus. 



Phymatothynnus tonsorius, sp. n. (PI. I. figs. 11, 12.) 



S . Niger, fulvopilosus ; manclibulis, apice excepto, clypeo 

 margine anteriore, pronoto fascia arcuata et margine anteriore 

 anguste, tegulis, postscutelloque macula parva llavis ; femoribus, 

 tibiis tarsisque ferrugineis ; clypeo apice bidentato ; hypopygio 

 linguiforme. 



5 . Fusco-ferruginea : mandibulis, fiagello, femoribus, tibiis 

 tarsisque bruneo-testaceis ; scutello compresso, subtuberculato ; 

 segmento media.no obliquo, angulis anticis subtuberculatis. 

 Long., <$ 13-17 mm. ; § 8-9 mm. 



<$ . Clypeus not much produced, strongly bidentate on the 

 middle of the apical margin ; the interantennal prominence only 

 represented by tubercles at the base of the antenna? ; apical joints 

 of the antenna? strongly arcuate beneath. Head, thorax, and 

 median segment opaque, closely and rather finely punctured ; 

 pubescence fulvous on the head and thorax, whitish on the 

 median segment and sides of the abdomen. First abdominal 

 segment slender, broadened from the base, longer than the 

 second, with a sulcus from the base reaching beyond the middle ; 

 abdomen shining, sparsely and very shallowly punctured, flattened, 

 elongate; the seventh dorsal segment and the apex of the sixth 

 rugose. Hypopygium linguiform, without spines. Wings hyaline, 

 faintly tinged with yellow ; second and third abscissa? of the 

 radius about equal ; second recurrent nervure further than the 

 first from the second transverse cubital nervure. 



$ . Clypeus with a carina ; the front deeply emarginate 

 anteriorly and subtuberculate at the base of the antenna?, with a 

 short frontal sulcus. Head shining, with scattered punctures, 

 nearly twice as broad as long, strongly rounded posteriorly. 

 Thorax and median segment very finely punctured ; the pro- 

 notum more than half as broad again as long, depressed at the 

 anterior angles, the anterior margin distinctly carinate between 

 the depressions ; scutellum strongly compressed and subtubercu- 

 late. Median segment oblique, the anterior angles subtuberculate. 

 Abdomen finely and closely punctured ; first dorsal segment 

 narrowly depressed at the apex ; second transversely rugulose 

 between two transverse carina?, the apical margin raised, with a 

 deep groove before it. Pygidium entire, almost vertical, broadly 

 ovate, longitudinally rugulose. Fifth ventral segment punctured 

 rugose. 



Hah. Yallingup, S.W. Australia; September to November. 

 S $ in cop. 



