324 hymenoptera. 



32. Bembex undulata. 



Bembex undulata, Spin. Ann. Soc. Ent. Fr. vii. 468 (1838). 

 Dahlb. Hym. Europ. i. 487- 3. 



Hab. Cape of Good Hope. 



33. Bembex grisescens. 



Bembex grisescens, Dahlb. Hym. Europ. i. 489. 16. 

 Hab. Port Natal, 



34. Bembex intermedia. 



Bembex intermedia, Dahlb. Hym. Europ. i. 491. 27. 

 Hab. Port Natal. 



35. Bembex Natalis. 



Bembex Natalis, Dahlb. Hym. Europ. i. 489. 14. 

 Hab. Port Natal. 



36. Bembex flavifrons. B.M. 



Female. Length 8-Si lines. — Black : the face yellow, a black 

 spot above the insertion of each antenna, and two spots at the 

 base of the clypeus ; the labrum and mandibles yellow, the latter 

 black at their tips ; the scape in front and the outer orbit of the 

 eyes broadly yellow. The prothorax yellow ; the sides of the 

 mesothorax, two abbreviated lines in front, and a transverse spot 

 at its posterior margin, yellow; a spot on each side of the scu- 

 tellum, a line on the post-scutellum, and an arcuate stripe on the 

 metathorax, yellow ; the thorax beneath and the legs yellow ; 

 the knees black ; the wings hyaline, the nervures testaceous. 

 Abdomen : the basal segment has a biarcuate fascia, narrow in 

 the middle and broadly expanded at the sides, yellow ; the second 

 segment has a broad yellow fascia at the base, its posterior mar- 

 gin biarcuate, with two black spots at the basal margin; the 

 three following segments have a narrower biarcuate fascia in the 

 middle ; beneath, the two basal segments yellow, the second having 

 a central longitudinal black stripe ; the two following segments 

 with a large angular macula on each side. 



Var. ». The fascia on the basal segment interrupted; be- 

 neath, all the segments black at their base, with lateral yellow 

 spots. 



Hab. Australia. 



