Mr. R. E. Turner on Fossorial Hymenoptera. 91 



ocelli ; a short longitudinal sulcus between the posterior 

 ocelli. Pronotum strongly rounded at the angles, with a 

 short median longitudinal sulcus : a shallow almost obsolete 

 sulcus reaching from the anterior margin of the mesonotum 

 to the middle. A narrow, transverse, crenulated fnrrow at 

 the base of the postscutellum^ and another at the base of 

 the median segment ; a distinct longitudinal sulcus running 

 from the base to the apex of the median segment. First 

 abdominal segment distinctly longer than the second, the 

 apical half moderately swollen, half as wide at the apex as 

 the apex of the second segment. Pygidial area coarsely 

 punctured-rugose at the base^ with a median carina, smooth 

 and shining at the apex. Hind tibite swollen and strongly 

 spinose. llecurrent nervnre received just beyond three- 

 quarters from the base of the cubital cell, at a distance from 

 the apex of the cell scarcely equal to the length of the trans- 

 verse cubital nervnre, 



(^ . The male has the head less produced behind the eyes, 

 the posterior ocelli being only a little farther from the poste- 

 rior margin of the head than from each other; the depres- 

 sions between the eyes and .the posterior ocelli are much 

 smaller and the abdomen much more slender. 



Hub. Yallingtip, S.^V^ Australia ; October and November. 



Taken bui'rowing in sand, the males flying low over the 

 sand. 



Nearly related to R. variitarse from Tasmania, but diflers 

 in the presence of a sulcus on the median segment, in the 

 position of the recurrent uervure, and in the sculpture of the 

 pygidial area. 



Rhopalum littorale, sp. n. 



5 . Nigra ; scapo subtus, tibiis anticis extus, tarsisque anticis et 

 iutermediis, articulo apicali excepto albido-flavis ; alls hyaliuis, 

 iridescentibus, venis nigris. 

 Long. 6 mm. 



? . Eyes separated at the base of the elypeus by a distance 

 equal to about one-quarter of the length of the scape. Pos- 

 terior ocelli as far from each other as from the eyes, and 

 about the same distance from the posterior margin of the 

 head ; a short longitudinal sulcus between the posterior 

 ocelli. A narrow groove along the inner margin of the eyes, 

 but no broad depression running towards the posterior 

 ocelli. Pronotum depressed, without a distinct dorsal 

 surface, rounded at the angles ; mesonotum without a sulcus. 

 Median segment with a transverse crenulated line at the 



