412 ^Ir. R. E. Turner on Fvssorial Ilymenoptera. 



space enclosed by low carina reaching from the apex of the 

 depression more than halfway to the apex of the segment. 

 Abdomen smooth and shining, the petiole as long as the 

 thorax without the mcflian segment. The recurrent nervnrc 

 is received at the middle of the first cubital cell. Black ; 

 the mandibles and the posterior angles of the pronotum 

 whitish ; scape beneath, the five basal joints of the flagel- 

 lura, tegulse and legs, except the coxae, testaceous brown, 

 darkest on the femora. Wings hyaline, uervures dark 

 testaceous. 



Length 4-5 mm.. 



Hab. Durban, Natal. 



Two specimens. 



Psenvlns ruhrocaudatns, sp. n. 



? . Clypeus covered with short greyish pubescence, the 

 anterior margin almost straight, with two small teeth in 

 the middle. Head shining, very minutely punctured, a low 

 longitudinal carina from the anterior ocellus joining a 

 strongly elevated carina between the autermie, a trans^erse 

 carina extending to the eyes below the antennae, but very 

 much nearer to them than to the base of the clypeus. Eyes 

 separated on the front by a distance equal to about one and 

 a half times the length of the scape. Antennre inserted 

 nearer to the eyes than to each other, separated from the 

 hase of the clypeus by about one and a half times the length 

 of the clypeus ; the first joint of the flagellum about half as 

 long as the second, which is half as long again as the third, 

 the apical joints thickened, the penultimate joint and the 

 preceding one broader than long; the whole antenna not 

 exceeding in length the thorax without the median segment. 

 Anterior margin of the pronotum raised. Thorax sparsely 

 and finely punctured, a vertical groove on the mesopleurse 

 below the anterior wings. IMedian segment rugose ; the 

 basal area short, longitudinally striated, more coarsely in 

 the middle than at the sides, produced at the apex and 

 continued in a deep, transversely striated longitudinal groove 

 reaching to the a})ex of the segment. Abdomen smooth and 

 shining, the petiole longer than the thorax without the 

 median segment, the pygidial area not defined. First 

 recurrent nervure interstitial with the first transverse cubital 

 nervure, or in one specimen received close to the base of 

 the second cubital cell, the second received by the third 

 cubital cell close to the base. Second cubital cell less than 

 hall' as long as the third on the radial nervure. 



