Descriptions of Neiv Species of Parasitic Hymenoptera. 147 



MeSOSTENUS ELIZABETHS, Sp. nOV. 



Dark red ; the apex of the fifth and the greater part of the three 

 following abdominal segments clear white ; the antennal scape dark 

 red, the flagellum black; joints 8-11 are white. Legs black, tinged 

 (especially the anterior) with red. Wings clear hyaline, the nervm-es 

 and stigma black. J . 



Length 7 mm. ; terebra 2 mm. 



Cape Colony. Port Elizabeth. 



Face closely rugosely punctured ; the upper part of the clypeus 

 sparsely punctured, the lower smooth, slightly tinged with yellow. 

 Mandibles rufous, black at the base and apex. Palpi fuscous. 

 Vertex and upper part of front closely rugose ; the latter with a keel 

 in the middle ; the part on either side of it is closely reticulated. 

 Mesonotum closely rugosely punctured, the middle lobe is irregularly 

 reticulated. Scutellum roundly convex, shining, punctured, but 

 neither closely nor strongly. Metanotum at the base closely 

 punctured ; the rest closely irregularly reticulated ; the second 

 transverse keel is indistinct in the middle, dilated at the sides. 

 Pro- and mesopleurae closely punctured, more or less striated in 

 the middle ; the metapleurae more strongly obliquely striated ; more 

 strongly on the upper than on the lower half, which is more or less 

 reticulated at the base. Central part of petiole clearly defined by 

 keels ; the post-petiole clearly separated, wide, closely, irregularly 

 striated ; the sides strongly, but not closely punctured. The second 

 and third and, to a less extent, the fourth segment are closely 

 punctured. 



Mesostenus lightfooti, sp. nov. 



Black, the thorax red, the clypeus, apices of the basal two 

 abdominal segments narrowly, the apices of the fifth more broadly 

 and the whole of the others yellow ; the four front legs fulvous, the 

 hinder black. Wings hyaline, the stigma dark fuscous, the costa 

 and nervures black ; the areolet minute, square. Antennae broadly 

 ringed with white. $ . 



Length 9-10 mm. ; terebra 16 mm. 



Cape Colony. King William's Town District ; St. Mathew's. 



Head distinctly wider than the thorax; the temples roundly 

 obliquely narrowed ; smooth and shining, the face opaque, pilose ; 

 front with a narrow keel down the middle. Pro- and mesonotum 

 smooth and shining; the former with a transverse striated furrow 

 near the apex. Scutellum shining, impunctate. Metanotum behind 



