272 HYMENOPTERA. 



the sides of the metathorax, the tegulae testaceous in the middle, 

 the wings subhyahne, their nervures ferruginous, all the tarsi 

 Ijright ferruginous ; the apical margins of all the segments have 

 a white marginal fascia ; the fifth segment has on its apical mar- 

 gin laterally a short blunt tooth, the sixth has a more acute one 

 on each side in the middle, the apex having four teeth, placed 

 two above and two beneath, the latter being the longest and 

 most acute. 



Hah. United States. 



47. CCELIOXYS 8-DENTATA. B.M. 



Ccelioxys 8-dentata, Say, Keating's Voy. St. Peter's Riv. App. 

 84 J Bost. Journ. Nat. Hist. i. 400. 1. 



Hab. N. America (N.W. Arkansas ; Pennsylvania). 



48. Ccelioxys alternata. 



Coelioxys alternata. Say, Bost. Journ. Nat. Hist. i. 401. 2. 

 Hab. N. America (Indiana). 



49. Ccelioxys dubitata. B.M. 



Female. Length 5^ lines. — This insect exactly resembles C. 

 rujitarsus, differing, as usual in the sex, in having the abdomen 

 conical ; the upper plate of the apical segment being suddenly 

 narrowed at half its length, forming on each side a sharp angle, 

 from which it gradually narrows to the apex, which is subacute ; 

 the lower plate is lanceolate, very slightly notched on each side 

 towards the apex. 



Hab. St. John's Bluff, East Florida. (R. Foster, Esq.) 



50. Ccelioxys funeraria. B.M. 



Male. Length 5 lines. — Black, head and thorax strongly and 

 very closely punctured, the face covered with snow-white pubes- 

 cence ; the thorax has some long white pubescence on the collar, 

 metathorax beneath, and on the sides ; wings subhyaline, the 

 nervures ferruginous, the tarsi ferruginous; the scutellum rounded 

 at its posterior margin and armed on each side with a short bent 

 tooth. Abdomen shining, closely and rather strongly punctured ; 

 all the segments have a snow-white band on their apical margins, 

 which is narrow in the middle and gradually widened towards 

 the lateral margins and continued uninterruptedly on the ventral 

 segments ; the apex armed with six teeth, placed one on each 

 side, and four at the apex placed two above and two below, the 

 lower pair longest and acute. 



Hab. Canada. 



