HYMENOPTERA. 329 



the posterior margins of the others biarcuate ; the second and 

 third have on each side a transverse black spot ; the fourth and 

 fifth have their anterior margins bisinuated ; beneath, the poste- 

 rior margin of the first segment, and a spot on each side of the 

 following segments, livid-yellow; the abdomen covered above 

 with short thin black pubescence. 



The male only differs in having the middle of the basal mar- 

 gin of the first segment of the abdomen beneath, produced into 

 an obtuse tubercle. 



Hab. Sumatra. 



48. Bembex ciliata. B.M. 



Bembex ciliata, Fabr. Syst. Piez. p. 226. 21. 

 Dahlb. Hym. Europ. i. 488. 11. 

 St. Farg. Hym. Europ. i. 279. 14. 



Hab. Brazil (Para; Santarem; Tapajos). 



49. Bembex gratiosa. B.M. 



Female. Length 6 lines. — Head black ; the inner orbit of the 

 eyes, the clypeus, scape iu front, labrum and mandibles, of a 

 glaucous-yellow ; tips of the mandibles ferruginous ; the flagellum 

 fulvous beneath and fuscous above, the basal joint black; a 

 glaucous spot in front of the anterior stemma. Thorax black 

 above and of a livid-yellow beneath ; the prothorax, lateral mar- 

 gins of the mesothorax, two stripes on the disk dilated anteriorly 

 and recurved posteriorly and united, the hinder margin of the 

 scutellum, the post-scutellum, a curved stripe on the metathorax 

 and its lateral angles, pale yellow ; the legs yellow, in some ex- 

 amples with a narrow black line on the femora above ; the wings 

 clear hyaline, the ncrvures pale ferruginous. Abdomen pale 

 yellow ; the extreme base black, and a cvu-ved spot on the basal 

 segment above ; a broad black band on the basal margin of the 

 second segment, which is suddenly narrowed at the sides ; the 

 apical margin has a narrow black band, which is widest and acute 

 in the middle ; the following segments are similarly banded, but 

 the bands are narrower ; the apical segment has a sharp tooth 

 on each side, and the apex is deeply notched. 



The male diff'ers in having a transverse raised carina on the 

 second segment of the abdomen beneath, which is terminated at 

 each end by a minute acute tooth ; the apical segment has a 

 tooth on each side and a deep notch at the apex, as in the 

 other sex. 



Hab. Brazil (Tapajos). 



q2 



