Descriptions of Neio Species of Parasitic Hymenoplera. 145 



"•' Stenaulax NIGER, sp. nov. 



Black ; the anterior tibiae and tarsi fuscous ; wings fuscous- 

 violaceous, the nervures and stigma black ; the areolet small, 

 square, receiving the recurrent nervure near the apex, the trans- 

 verse median nervure received behind the transverse basal. $ . 



Length 17 mm. 



Cape Colony or Transvaal. 



Face closely and strongly punctured ; the upper half of clypeus 

 more sparsely punctured, the apical smooth. Front deeply excavated ; 

 there is a short broad keel below the ocelli ; the middle irregularly 

 transversely striated ; the ocellar region strongly and closely, the 

 rest less closely punctured. Head not quite so wide as the thorax ; 

 the temples wide, rovinded. Thorax closely punctured ; the apex 

 of the scutellum smooth ; the metanotum irregularly rugosely punc- 

 tured, almost reticulated ; the spiracles large, about two and a half 

 times longer than wide ; the segment is closely covered with short, 

 fuscous pile. The petiole becomes slightly, gradually narrowed to 

 the spiracles ; post-petiole distinct. 



S. pilosulus may be known by the densely pilose head and thorax, 

 by the interstitial transverse median nervure, and by the temples 

 not being obhquely narrowed. The antennae, too, are longer and 

 more slenderly built. 



MESOSTENUS, Gravenh., sec. Ashm. 



The small species of this genus with dark rufous head and thorax 

 may be separated by means of the following table : — 



1 (2). Abdomen and legs black rhodesUe. 



2 (1). Abdomen and legs rufous, or dark rufous. 



3(4). Mesonotum stoutly transversely striated .. ' mimeticus. 



4 (3). Mesonotum punctured. 



5 (8). Median segment closely reticulated, not more strongly between 



the keels than on the apical slope. 



6 (7). Breasts, lower part of metapleurse and hind coxte black ; palpi 



testaceous ; length 10 mm oncili, Cam. 



(G). Thorax and hind coxae without black, palpi fuscous ; length 



7-8 mm clizahctlue. 



8 (5). Median segment strongly, widely reticulated, more strongly 



between the keels than elsewhere ; palpi white alhipalpis. 



Mesostenus RHODESIA, sp. nov. 

 Head and thorax red, the former darker coloured, with the oral 

 region and apex of mandibles black ; abdomen black, the apical two 



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