HYMENOPTERA. 57 



each side of the second, third, and fourth segments ; the terminal 

 ventral segment lanceolate, with a sharp spine at the apex. 



Hab. S. x\ustralia (Lower Plenty). 



Female. Length 3 lines. — Rufo-fuscous : the antennae, man- 

 dibles, and legs pale rufo-testaceous ; the head smooth and shi- 

 ning ; the second segment of the abdomen with four deep trans- 

 verse grooves ; the apical segment ferruginous. (Coll. R. Bake- 

 well, Esq.) 



13. jElurus barbatus. 



Male. Length 6 lines. — Black : head and thorax rugose and 

 thinly covered with cinereous pubescence, the sides of the head 

 with a long curled fringe of the same colour ; the cheeks pro- 

 duced into a short spine at the base of the mandibles ; behin<l 

 the eyes is an obscure ferruginous stripe. Thorax : the tips of 

 the femora, the tibiae, and the tarsi ferruginous ; the wings hya- 

 line, with a slight fulvous tinge ; a small fuscous cloud in the 

 marginal cell. Abdomen subpetiolate and shining; the apical 

 ventral segment rounded at the apex, and with a minute tooth 

 in the middle. 



Female. Length 3^ lines. — Dark fusco-ferruginous : the head 

 anteriorly, the mandibles, the thorax, legs, and two basal seg- 

 ments of the abdomen, rufo-testaceous, the mandibles and pro- 

 thorax palest ; the thorax closely punctured, the head more 

 sparingly so. Abdomen finely rugose, with a smooth shining 

 space at the base of the segments, the second segment trans- 

 versely coarsely and irregularly striated. 



Hab. S. Australia (Lower Plenty). (Coll. R. Bakewell, Esq.) 



14. .Elurus dentatus. 



Male. Length 5^ lines. — Black : head and thorax rugose, the 

 abdomen shining and subpunctate. Head transverse ; the pos- 

 terior margin of the vertex widely and very slightly emarginate ; 

 thinly covered with fulvous pubescence, the sides of the head 

 with a long curled beard of the same ; the mandibles ferruginous 

 at their apex ; close to their base the cheeks are produced mto a 

 short, stout, acute tooth. Thorax : the sides and beneath with 

 griseous pubescence, on the disk it is slightly fulvous ; wings 

 hyaline, the nervures dark fuscous ; the tibiae and tarsi ferrugi- 

 nous. Abdomen subpetiolate ; the basal segment with a central 

 impressed line, not extending to the apex, and with a minute 

 tooth on each side a little before the middle ; the apical ventral 

 segment truncate, with a sliort acute spine in the middle which 

 emanates from a small truncate base. 



d5 



