450 HYMENOPTERA. 



white ; the flagelkim fulvous beneath. Thorax ; a white spot 

 on the tegulse in front ; the tibiae and tarsi pale testaceous, the 

 femora rufo-testaceous as well as the posterior tibiae and tarsi ; 

 wings fulvo-hyaline and iridescent. Abdomen : the basal seg- 

 ment ferruginous, the third segment with a narrow white mar- 

 ginal fascia. 



Hab. Africa. (Coll. F. Smith.) 



66. Cerceris militaris. 



Cerceris militaris, Dahlb. Hym. Europ. i. 224. 



Hah. Africa. 



67- Cerceris nigrifrons. B.M. 



Male. Length 4^ lines.— Black, punctured : the scape in 

 front, a short carina between the antennae, and two minute spots 

 on the face, yellow ; the flagellum beneath, and the mandibles 

 ferruginous, the apex of the former fuscous. Thorax coarsely 

 punctured ; the tegulse yellow in front ; the wings slightly 

 coloured, with a fuscous cloud at their apical margins, that on 

 the fore wings occupying the marginal cell, and darkest from 

 thence to the apex of the wing ; the legs ferruginous, with the 

 anterior and intermediate tibiae in front, and the basal joint of 

 the tarsi pale testaceous ; the tibiae have a dark fusco-ferruginous 

 stain behind ; the apical joiuts of the tarsi fuscous above. Abdo- 

 men : the basal segment ferruginous ; the second narrowed at 

 the base, the third with a yellow band at its apical margin, 

 the sixth entirely yellow ; beneath, the second segment shining, 

 with large scattered punctures ; the following segments have some 

 coarse punctures at the sides ; the third has a yellow band at its 

 apical margin. 



Hah. Africa. 



68. Cerceris argentifrons. 



Cerceris argentifrons, Guer. Icon. R^g. Anim. 445. 



Hah. Madagascar. 



6J>. Cerceris nigro-cincta. B.M. 



Female. Length 5 hnes. — Black : the head, thorax, and basal 

 segment of the abdomen, coarsely punctured ; the second, third 

 and fourth segments more finely and distantly punctured ; the 

 fifth more strongly so, as well as the sides of the sixth segment ; 

 the latter transversely rugose above. The clypeus, a large spot 

 on each side of the face, and the scape in front, yellow, some- 



