2?0 HYMENOPTERA. 



head densely clothed with a short scale-like pubescence, the 

 vertex naked ; a transverse line of fuscous pubescence on the 

 face, in a line with the anterior stemina ; the disk of the thorax 

 coarsely punctured, the scutellum rugose, having on each side a 

 stout tooth ; a continuous line of whitish pubescence passes over 

 the collar, tegulse, and base of the scutellum ; the thorax on the 

 sides and beneath covered with a very short snow-white pubes- 

 cence ; the legs red, and having behind a line of snow-white 

 pubescence ; the tegulae red, the wings fusco-hyaline, their apical 

 margins fuscous, a narrow cloud passing along the superior margin 

 of the marginal cell ; the nervures dark fuscous. Abdomen, the 

 three basal segments red, and, except the apical segments, entirely 

 red beneath ; all the margins of the segments have a narrow fringe 

 of short snow-white pubescence ; a broad patch of the same in 

 the middle of the basal ventral segment ; the superior plate of 

 the apical segment pointed, and having a central carina fringed 

 with fuscous pubescence ; the ventral plate longer than the 

 superior, acute at the apex, having a fringe of dark fuscous pu- 

 bescence on the sides. 



Male. This sex closely resembles the female, the apical seg- 

 ment denticulate, a short tooth on each side, the apex being 

 quadridentate, the lower pair of teeth longest and acute. 



Hab. Brazil (Santarem). 



40. CCELIOXYS RUFOPICTA. 



Male. Length 6 J lines. Black, the vertex of the head coarsely 

 punctured, the face covered with a pale golden-yellow pubescence, 

 the mandibles ferruginous in the middle. Thorax shining, 

 sparingly punctured in the centre, but more thickly and strongly 

 at the sides ; the prothorax elevated, the scutellum smooth and 

 shining, having on each side a few large punctures, its posterior 

 margin slightly produced in the middle and armed on each side 

 with an obtuse tooth diverging outwards ; the wings fusco- 

 hyaline, having irregular transparent spaces ; the legs ferrugi- 

 nous, the femora being more or less fuscous. Abdomen elon- 

 gate, rather strongly punctured at the base, but much more 

 finely towards the apex ; a bright ferruginous spot on each 

 side of the basal segment, the apical margins of the segments 

 beneath, ferruginous ; all the margins have a narrow marginal 

 fascia, more or less interrupted above ; the ventral segments have 

 a central carina which extends from the base to the apex of the 

 fourth segment ; at its termination are two short acute spines ; 

 the apex armed with six teeth, a short acute one on each side, 



