Some New Genera and Species of Hymcnoptera. 203 



hind wings broken far below the middle. Temples narrow, 

 obliquely narrowed ; vertex not separated from occiput by a keel. 

 Median segment with, in all, eight areae ; the apex has a sharply 

 oblique slope and is surrounded by stout keels which form one large 

 area. First abdominal segment about twice longer than it is wide 

 at the apex, towards which it becomes gradually wider ; in the centre 

 are two longitudinal keels ; the spiracles are placed before the 

 middle ; second abdominal segments without a keel. Hind tibiae 

 with two spurs. First joint of the flagellum as long as the following 

 two united. Metanotal spiracles elongate, about three times longer 

 than wide. 



This genus comes close to Exochus, which may be known from it 

 by the first abdominal segment not having keels, by the temples 

 being well developed, and by the transverse median nervure being 

 interstitial, not widely separated from the basal as in the present 

 genus, these differences being in addition to those just noted. 



Plesioexochus rufipes, sp. nov. 



Black, shining, the head and upper part of thorax thickly covered 

 with longish fuscous pubescence ; the legs bright red, covered with 

 a white pile ; wings hyaline, the nervures and stigma fuscous ; the 

 front below the antennae brown ; the greater part of the antennae 

 fuscous below. $ . 



Length 6 mm. 



Cape Colony. Stellenbosch. 



Face and clypeus closely, strongly punctured ; the apex of the 

 clypeus smooth and shining. Mandibles obscurely tinged with testa- 

 ceous. Palpi bright testaceous. Propleurae shining, bare, deeply 

 depressed in the middle. Hind calcaria stout, the longer reaching 

 beyond the middle of the metatarsus. Apices of tarsal joints 

 minutely spined. 



Family BKACONIDZE. 



Gen. BEACON, Fab. sec. Ashm. 



Beacon whitei, sp. nov. 



Eed ; the antennae, front and vertex, a mark, slightly longer than 

 broad and rounded below, in the top of the face above and the meso- 

 notum, except the sutures behind, black ; wings dark fuscous, a 

 large cloud behind the transverse median nervure and reaching from 



