220 RKVISION OF THE THVXNID^ OF AUSTRALIA, I., 



the scutellum triangular, very narrowly truncate at the apex. 

 Median segment strongly punctured at the base, truncate and 

 verv tinely punctured- rngulose at the apex. Abdomen rather 

 sparsely punctured, with an impressed transverse line near the 

 base, and a curved elevation strongly emarginate in the costa 

 close to apical margin of segments 2-5. Epipygium rugose, 

 smooth and with a median carina and recurved margins at the 

 extreme apex, which is narrowly rounded. Hypopygium tri- 

 dent ate, carinate beneath, wincjs fusco-violaceous. The second 

 recurrent nervure is received by the third cubital cell at about 

 one-third of the distance from the base to the apex, not quite 

 close to the base as in other species of the genus. Length 13mm. 



Q. Head subquadrate, slightly rounded at the posterior angle>^, 

 very sparsely punctured, a short median sulca between the 

 antenna?, the space above the base of the antenna? densely 

 punctured, and thinly clothed with fulvous pubescence. An 

 almost straight sulca on each side from the inner margin of the 

 eve to the occiput; and a shallow depressed mark on each side of 

 the vertex, very nai-rowly separated. Thorax and abdomen 

 sparsely punctured ; the thorax short, the medinn segment 

 obliquely truncated from the base, the surface ot the truncation 

 very strongly concave. First abdominal segment vertically trun- 

 cate anteriorly; epipygium elongate, produced near the base at 

 the sides into strong angles, thence narrowed and produced, the 

 disc narrow, raised at the margins into very slight subparallel 

 carin^e; a tuft of golden hairs on each side at the apex. Black; 

 the legs and antenme fuscous. Length 9 mm 



Hab. — Cairns, Q.((J9 in cop.). 



The male is very near R. jusci'penyvs^ and I should have 

 hesitated to describe it had it been taken without the female, 

 which is quite different, especially in the median segment. 



11. AURICEPS, n.sp. 



^. Clypeus with a carina from the base to the middle, thence 

 bi anching, the branches reaching the anterior margin, the enclosed 

 triangular space narrow and rugose, the sides of the clj^peus very 



