Descriptions of Species of Parasitic Hymenoptera. 215 



Inner orbits margined by a stout raised keel, the part between the 

 keel and the eyes striated ; the inner side rugosely punctured ; the 

 frontal depression smooth ; the vertex and temples closely rugosely 

 punctured. Malar space two-thirds of the length of the eyes. Pro- 

 and mesonotum and scutellum closely punctured ; the pronotum more 

 closely, more opaque, and more densely pilose than the mesonotum ; 

 the scutellum has a wide, shallow, punctured furrow down the centre ; 

 its apex is margined, broadly rounded. Parapsidal furrows narrow, 

 distinct. Metanotum opaque, except for a shining oblique area on 

 either side near the base ; it is narrowed on the inner, broad and 

 transverse on the outer side ; the rest is finely rugosely punctured ; 

 in the centre is an area extending from the base to the apex; its 

 basal fourth becomes gradually widened ; from the widened part 

 it becomes narrowed towards the apex, the keels, however, not 

 meeting there ; the sides have a longish projection near the base. 

 Basal segments of abdomen smooth, the apical punctured ; the apical 

 segments forming a short stout ovipositor ; the ventral surface is 

 rufous. Pro- and metapleurae rugosely punctured, the latter more 

 closely than the former; in the middle of the mesopleurae is a 

 striated belt, broad above, becoming gradually narrowed below ; 

 the base and apex are irregularly, largely and finely, punctured. 



This is not a typical Stomatoceras as defined by Kirby (Journ. 

 Linn. Soc, xvii., 62), for that has the apex of the scutellum "armed 

 with two small raised teeth," while in the species I have described it 

 is broadly rounded. It agrees fairly well otherwise with the generic 

 description of Stomatoceras. 



CRx\TOCENTKUS, gen. nov. 



Abdomen with a long ovipositor — longer than the abdomen — the 

 last segment conically projecting above, forming there a short 

 sheath for the base of the ovipositor ; the sheaths of the ovi- 

 positor moderately broad, punctured at the base. Antennas stout, 

 ten-jointed, densely pilose, originating close to the mouth. Apex 

 of scutellum broadly rounded. Apex of metanotum with a broad 

 rounded tooth above. Hind femora with ten teeth, the apical small, 

 and close to each other, the basal larger and more widely separated. 



The malar space is nearly as long as the eyes ; the anterior 

 ocellus is clear of the frontal depression ; the hind ocelli are 

 separated from each other by a distinctly greater distance than 

 they are from the eyes ; they are separated from the anterior by 

 about the same distance as they are from the eyes. The last 



