88 Mr. R. E. Turner on Fossoi'ial ITijmenoptera. 



scape ; posterior ocelli more than half as far again from the 

 eyes as from each other, a little nearer to the posterior 

 margin of the head than to the eyes ; a broad obliciue de- 

 pression from the inner margin of the eyes not reaching the 

 posterior ocelli. Front strongly concave and shining, the 

 rest of the head and thoiax subopaque. Pronotnm trans- 

 verse, with a distinct dorsal snrface, the angles well defined, 

 not rounded, without a sulcus. Mesonotnra without a 

 sulcus ; a narrow, transverse, crenulated line at the base of 

 the median segment, the triangular area of the median 

 segment well defined and divided by a longitudinal sulcus. 

 First abdominal segment nearly lialf as long again as the 

 second, a little swollen at the apex, the second segment 

 about three times as wide at the apex as the first. Fifth 

 dorsal segment thickly clothed with very delicate golden- 

 brown pubescence; pygidial area sparsely punctured at the 

 base, smooth at the apex. Recurrent nervure received 

 beyond three-quarters from the base of the cubital cell, at 

 a distance from the apex scarcely exceeding the length of 

 the transverse cubital nervure. Hind tibiae swollen on the 

 apical half,, strongly spinose. 



cJ . As in the female ; but the depressions on the inner 

 margin of the eyes are much smaller, and the second abdo- 

 minal segment is distinctly longer and more slender in 

 proportion to the first. 



Hab. Yallingnp, S.W. Australia ; October and November. 

 Warren River, S.W. Australia {W. D. Dodd). 



I took the male in some numbers on Leplospermum blossom, 

 but the only female was taken from an Asilid tly. Mr. Dodd 

 took two females on the Warren River, but no males. 



Rhopalum cygnorum, sp. n. 



$. Nigra; scapo, femoribus, tibiis tarsisque anticis, fcmoribus 

 tibiisque iutermediis subtns, tarsis intermediis, tuberculisque 

 humeralibus flavis ; alls hyalinis, iridesccntibus, venis nigris ; 

 flagello subtus bruuneo. 



Long. 5 mm. 



$ . Eyes separated from each other at the base of the 

 clypeus by a distance nearly equal to half the length of the 

 scape ; posterior ocelli far apart, farther from each other 

 than from the eyes or from the posterior margin of the head ; 

 a narrow oblique sulcus running from the inner margin of 

 the eyes to the posterior ocelli. Head finely and closely 

 punctured ; thorax shining, almost smooth. Pronotum 

 transverse, with a distinct dorsal surface, the angles well 



