HYMENOPTERA 77, 



(83) " O. sandwichensis, n. sp." 



" Paitmlus, niger, perdepressus ; postscutello, metathorace, abdominis primo seg- 

 menio, secundi margine et lateribus, rubris ; alis caerulescetiiibus ." 



"Long. 7 mm.; env. 15 mm." 



" Male. Petit, grele, ires ddprim^. Metathorax depassant de beaucoup le post- 

 ecusson, arrondi. Abdomen tres plat ; le premier segment en cloche, moins large 

 que le deuxieme. Insecte noir, ponctud, mais lisse et luisant. Entre les antennes 

 un point rouge ; un autre sous I'aile ; deux autres sur chaque ecaille ; post^cusson 

 et metathorax d'un rouge sombre ; le premier segment de I'abdomen, le bord du 

 deuxieme et ses cot^s, de la meme couleur, ainsi qu'un fin lisere le long des autres 

 segments. Pattes noires. Ailes assez brunes, avec un reflet violet ; deuxieme cubi- 

 tale subtriangulaire. 



Distinct par sa forme tres aplatie. 



Habite. Les iles Sandwich. (Musde de Londres.)" 



Obs. This species is evidently closely allied to O. rubriti^ictus, Sm. 



The three following species are in the collection of the British Museum, and 

 each is represented by only a single example. They appear to be distinct from 

 any of the species collected by me. 



(84) Odynerus infaushis, sp. nov. 



Niger, mandibulis clypeique parte apicali rubris. Caput cum mesonoto obsolete 

 punctatum. Abdominis segmentum secundum ventrale baud post costas depressum, 

 parte basali permagna, costis multo longiore. ?. 



Black, mandibles and apical half of the clypeus red, the latter faintly emarginate 

 at the apex. Head and whole thorax dull, the puncturation obsolete. Abdomen 

 with the punctures of the basal segment very feebly impressed. Second ventral 

 segment beneath with the basal portion very large, several times as long as the 

 short costae, beyond which there is no depression. Wings dark, with violet irides- 

 cence. 



Hab. Brought back by the Beechey expedition, probably from Oahu. The 

 species appears to be very closely allied to O. egens, next to which it may be 

 placed. 



p. F. H. 10 



