23(J HYMENOPTERA. 



7. PODIUM OPALINUM. B.M. 



Female. Length 6^ lines. Black : the head shining and 

 delicately punctured, with a thinly scattered long black pubes- 

 cence. Thorax : the mesothorax and scutellum highly polished, 

 and having a few scattered delicate punctures ; the inetathorax 

 closely punctured ; in the centre a deeply impressed longitudinal 

 channel ; the thorax, coxae and trochanters, and also the petiole 

 of the abdomen, with thinly scattered long black hairs ; the an- 

 terior wings fuscous, with a brilliant violet iridescence and two 

 fasciae, the first crossing at the apex of the externo-medial cell, 

 the second passing over the second submarginal cell; the poste- 

 rior wings hyaline, with their apex slightly fuscous. The abdo- 

 men has a brilliant opaline iridescence. 



Male. Length 6 lines. This sex only differs in having the 

 wings paler and the anterior tibiae rufo-testaceous in front. 



Hab. Jamaica. 



This species appears to approach very closely to the Ammo- 

 pldlusfumigatus of Perty. 



8. PODIUM COMPLANATUM. 



Female. Length 10 lines. Shining jet-black : the head com- 

 pressed, sparingly and delicately punctured ; the anterior margin 

 of the clypeus emarginate. The prothorax elongate, the sides 

 rounded, convex above, impunctate ; the mesothorax, scutellum 

 and post-scutellum impunctate ; the metathorax flattened, longi- 

 tudinally strigose-punctate at the base in the middle, the apical 

 half with scattered delicate punctures; a central longitudinal 

 slightly impressed line terminates in a fasciolet near the apex ; 

 the wings hyaline, with a narrow dark fascia crossing at the 

 second submarginal cell, and a fuscous stain traversing the ex- 

 terno-medial nervure ; the legs smooth and shining. Abdomen : 

 flattened, highly polished and impunctate; the petiole bent, 

 curving upwards. 



Hab. South America. (Coll. W. W. Saunders, Esq.) 



9. PODIUM DENTICULATUM. 



Female. Length 8 lines. Black : the face closely, the vertex 

 distantly and delicately punctured ; the clypeus armed with six 

 acute teeth on its anterior margin ; the sides of the face have a 

 short silvery pubescence, the vertex and cheeks thinly clothed 

 with long silvery hairs. Thorax : the mesothorax and scutellum 

 have a few delicate scattered punctures and are smooth and 

 shining ; the metathorax, the sides and beneath more strongly and 

 closely punctured ; the prothorax has a central depression on its 



