Some New Genera and Species of Hymenoptera. 209 



Assuming that Mr. Kirby's figure of D. excavatus, Dal. (a widely- 

 spread African species), is correct, the species here described may 

 be readily known by the central area on the metanotum beiDg much 

 larger and longer, reaching to the apex, whereas in excavatus the 

 central area only reaches to the middle and is followed by two 

 larger ones which extend to the sides. ........ 



RHYNCHOCHALCIS, gen. nov. 



Antennae inserted over the mouth, 10-jointed, the last longer than 

 the preceding two united. Malar space longer than the length of 

 the eyes. Apex of scutellum with two. rounded lobes. Sides of 

 metanotum above with a stout, turned up obliquely, tooth. Ovi- 

 positor stout, fully one-third longer than the abdomen, the segments 

 enclosing it reaching shortly beyond the middle. Hind femora 

 greatly thickened, untoothed, pilose below. 



The antennae are short and stout, the scape does not reach to the 

 ocelli ; its apex is dilated ; the frontal depression at the sides and 

 above clearly keeled, the keel enclosing the front ocellus. Below 

 the eyes the head becomes distinctly, obliquely narrowed, forming a 

 snout. There is a large rounded keel between the antennae. Malar 

 space keeled on inner side. 



In Dr. Ashmead's arrangement (Mem. Carnegie Museum, i., 256) 

 this genus comes nearest to Hippota, with which it cannot be con- 

 founded in either sex. The very long ovipositor reminds one of 

 Megachalcis and Megacolus, which, however, do not belong to the 

 Halticellini. 



RHYNCHOCHALCIS NIGER, Sp. 110V. 



Black, thickly covered with silvery pubescence, the wings fusco- 

 hyaline, the nervures and stigma black. 2 ■ 



Length 8 mm. ; terebra 4-5 mm. 



Cape Colony. Stellenbosch. 



Head opaque, alutaceous ; the vertex and outer orbits punctured, 

 the latter more strongly above than below ; the orbits and the malar 

 space thickly covered with long silvery pubescence. Clypeus shining, 

 sparsely punctured below and more depressed there than above. A 

 smooth keel runs down from the centre of the eyes to the mandibles. 

 Pro- and meso-thorax strongly punctured, the base of mesopleurae 

 smooth and shining, the rest opaque, rugosely, closely punctured 

 and densely covered with long fuscous pubescence. The sides and 

 apex of scutellum distinctly margined, the apex in the middle trans- 

 verse, the sides obliquely narrowed. In the centre of the metanotum 

 are two longitudinal keels ; at the base is a row of round foveas, 



