The Hymenoptera of the Georgetown Museum. 107 



behind and the basal half all round ; black. Femora with 23 teeth, close 

 together, of almost equal size throughout. Apex of scutellum bluntly 

 rounaed, the centre slightly narrowed. Female. Length, 5 m.m. 



Potaro, May. 



Head, pro and mesonotum coarsely punctured, the puncturt on the 

 scutellum running into reticulations, — covered densely with a white ile. The 

 base of the mesopleurae smooth, irregularly longitudinally, not very closely 

 striated ; the portion immediately below the tegulae is smooth, divided into 

 2 parts by a furrow, oblique, the upper part sloping towards the base, of equal 

 width, about one half longer than wide, the apical part larger, sloping obliquely 

 to the apex, conical, the narrowed part above. Metapleurae rounded, covered 

 with large, deep, clearly separated round punctures, placed in oblique rows ; 

 in the centre, on the lower three-fourths is a row of larger punctures, with a 

 smooth border on either side. The metanotum short, the reticulations large, 

 the basal row small, the central large, the middle pair oblique, wider than 

 long, narrowed inwardly ; the narrowed part at the apical junction is closed 

 by a keel, forming a small triangular area. Abdominal petiole as wide as 

 long. Near the apex of the hind coxae above is a distinct, sharp spine. Ab- 

 domen shorter than the thorax ; the sheath of the ovipositor is broad. 



Spilochafois guianensis, sp. n. 



Reddish test?>ceous, the flagellum of antenna?, apex of femoral teeth and 

 the sheath of ovipositor, black ; there are 13 femoral teeth, the basal long, 

 curved testaceous, black at the apex, the others short, thick ; wings hyaline, 

 the nervures testaceous. Apex of scutellum projecting more broadly than 

 the sides, almost transverse. The middle areas of metanotum are large, 

 there are 6 ; the middle pair wider than long, the outer 2 more distinctly 

 longer than wide. The upper parts of the head, except the central hollow, 

 pro-mesonotum and scutellum closely reticulated punctured, the parapsidal 

 furrows crenulated. Abdominal petiole twice longer than wide, stoutly 

 keeled in the middle above, the abdomen is as long as the head and thorax 

 united ; the ovipositor distinctly projects. Propleurse reticulated above ; 

 there is a distinct, obliquely curved furrow down the middle ; the lower part 

 is smooth, depressed and bordered above by a curved furrow. Base and apex 

 of mesopleurae smooth, the raised centre irregulaily striated. Thoracic pile 

 black. Female. Length, 7 m.m. 



The basal half of the flagellum is brownish below. Abdomen as long as 

 the head and thorax united, the antennal scape is pale lemon-yellow. 



Spilochalcis quelchi, sp. n. 



Ferruginous, the antennal scape, oral region, face, malar space and the 

 lower part of the outer orbits, pallid yellow, the flagellum except the basal 

 half, which is brown and the pedicle which is testaceous except broadly above, 

 the femoral teeth, and the sheath of the ovipositor, black ; there are 16 

 femoral teeth, the basal long, curved, testaceous, black at the apex; the 

 others are small, the middle testaceous at ihe base. Abdominal petiole nearly 



