418 Mr. R. E. Turner on Fosson'al Ifijmenoptera. 



separated by a groove from the mesonotum or postscutelliim, 

 rectangular, less than twice as broad as long ; postscutelliim 

 not depressed in the middle; basal area of the median seg- 

 ment coarsely longitudinally striated, the surface of the 

 posterior truncation shining, with a few indistinct transverse 

 striae, the angles of the segment produced into stout spines 

 directed outwards and backwards. Abdomen punctured, 

 most strongly on the basal segment, very finely aiid indis- 

 tinctly on the four apical segments. Second ventral seg- 

 ment strongly punctured and moderately convex ; sixth 

 dorsal segment distinctly margined at the sides, shallowly 

 emarginate at the apex. Sides of the first ventral and 

 second dorsal segments dark ferruginous. Third cubital 

 cell almost pointed on the radius, not reaching nearer to the 

 apex of the wing than the radius. Both recurrent nervures 

 received by the second cubital cell, the first close to the 

 base, almost interstitial, the second at four-fifths from the 

 base. Spines of the hind tibife very small and indistinct, 

 almost obsolete. 



Hub. Nyomps Ndogo, British East Africa [Gi-egory). 



This belongs to the same group as capensis, Handl., and 

 nasutua, Cam. Tiie cubitus of the hind wing originates far 

 be3'^ond the transverse median nervure. The frontal carina 

 is better defined than in cujjensis and the antennae inserted 

 furtiier apart, the posterior ocelli are more widely separated, 

 the proportionate length of the joints of the flagellum very 

 difierent, and the spines of the hind tibire much less 

 developed. The colour of the a[)ical abdominal segments is 

 also different, and the punctures on the head are larger in 

 capemis. 



Nysson rnfomyer, s[). n. 



J . Niger ; clypeo, scapo, flagello articulo primo, pronoto iu medio 

 interriipto, tibiis supra, segraentisque dorsalibus 1-5 fascia 

 angusia apicali flavis ; abdomine podibusquc rufo-ferrugineis : 

 alls hyalinis, venis nigris. 



Long. 7 mm. 



$. Front produced and subtuberculatc between tl:e an- 

 tennae, rounded at the apex, without a carina. Antennoi 

 inserted nearer to each other than to the eyes, much 

 thickened towards the apex ; first joint of the fl;igelluni 

 globular, longer than the very short second joint, all the 

 joints, except the apical one, broader than long. Eyes 

 strongly convergent towards the elypeus, the inner nuirgin 

 slighily sinuate; posteiior ocelli about as far from the eyes 



