HYMENOPTERA. 269 



fuscous towards their apical margins, the nervures dark ferrugi- 

 nous ; the legs, abdomen beneath and base above, ferruginous ; 

 the abdomen shining, punctured at the base, and on the basal 

 margins of the segments laterally; otherwise, the punctures widely 

 scattered ; an indistinct carina runs down the middle of the 

 abdomen, becoming raised and decided on the apical segment, 

 the upper plate of which is a little shorter than the lower one, 

 which is acute at the apex and slightly notched on each side ; 

 beneath, the abdomen has a similar undefined carina down the 

 centre. 

 Hab. Brazil. (Coll. W. W. Saunders, Esq.) 



37. CCELIOXYS SIMILLIMA. B.M. 



Female. Length 4J lines. Very similar to C. tridentata, but 

 the scape is entirely black, the thorax is not produced in the 

 middle, the anal valve has the inferior plate produced into a more 

 elongate spine and is not notched at the sides ; in other respects 

 it corresponds with that species, of which it possibly may be a 

 mere variety ; the male is not known ; it may also be a variety 

 of the pr&texta of Haliday, but the description of that species is 

 too short to be at all relied upon in this variable genus. 

 Hab. Brazil. 



38. CCELIOXYS L^BVIGATA. B.M. 

 Male. Length 4 lines. Black, very smooth and shining ; on 



the head and thorax the punctures are large and scattered, on 

 the abdomen they are finer and cover the basal segment, and 

 the base of all the following, a transverse line towards the 

 margins of each, the intervening portions being smooth and 

 shining ; the face covered with very pale fulvous pubescence ; 

 the tegula? and legs bright ferruginous ; the wings subhyaline, 

 their apical margins have a fuscous cloud, as well as the upper 

 half of the marginal cell ; the nervures black ; the scutellum im- 

 punctate, produced in the middle into a broad spine, which is 

 rounded at its apex ; on each side an elongate smooth spine ; 

 the apical segment of the abdomen armed with six acute spines, 

 one on each side about the middle ; four at the apex, two on 

 each side, of which the two lower spines are the longest ; all the 

 segments have a narrow white marginal fascia a little widened 

 at the sides and beneath, and more or less interrupted above ; 

 the apical margins of the ventral segments ferruginous. 

 Hab. Para. 



39. CCELIOXYS ZONULA. B.M. 

 Female. Length 6-/ lines. Head and thorax black, the 



