j,o FAUNA HAWAIIENSIS 



(78) Odynerus c he lifer, sp. nov. 



Nio-er alis infuscatis caeruleo-iridescentibus, mandibulis plus minusve rufescent- 

 ibus vel piceis. Mesonotum opacum, distincte subtilius punctatum. Abdominis seg- 

 mentum secundum baud elevatum ; subtus, depressione fere obsoleta. Uterque sexus 

 genis inter oculos mandibulasque distinctis (?-ae longioribus) insignis. Mandi- 

 bulae (?) perlongae et angustae, dentibus fere obsoletis. i%. Long. 5 — 7 mm. 



(Plate I. fig. 3I-) 



Black, the wings infuscate, and with blue iridescence. Mandibles more or less 

 red or piceous on their apical portion. The cheeks between the base of the man- 

 dibles and eyes are distinct in both sexes, but longer in the ?, in which sex the 

 mandibles are extremely long and narrow, with the teeth obsolete or nearly so. 

 The length of the part of the mandible, which projects beyond the apex of the 

 clypeus, is about equal to the length of the clypeus itself. Interantennal carina 

 very distinct and sharp, no flavous spot at its base. Mesothorax dull, distinctly but 

 finely punctured ; propodeum roughened by the subobsolete punctures. Abdomen 

 with the second segment simple above, not raised from the base ; beneath, with the 

 depression extremely feeble and indefinite. 



Hab. Kona, Hawaii (4000 ft.); Molokai and Lanai (coast to 3000 ft.). Rare. 

 The examples from Hawaii do not altogether agree with the others, but the material 

 is insufficient to separate them specifically. 



(79) Odynerus nigripennis. 



RJiygchittm nigripennis, Holmgren, Eugenies Resa, Zool. vi. p. 441. 



Odynerus viaurus. Smith, J. Linn. Soc. .kiv. p. 679. 



Odynerus nigripennis, Blackburn and Cameron, P. Manch. Soc. Vol. xxv. 

 (1885—86), p. 151. 



Niger, robustus, alis infuscatis, caeruleo-iridescentibus, fronte flavo-notata. Cly- 

 peus leviter dentato-emarginatus. Mesonotum cum scutello densissime, subtilius, 

 rugoso-punctatum. Postscutellum ad truncationem linea elevata (plerumque serrulata) 

 munitum. Abdominis segmentum secundum baud elevatum ; subtus, depressione 

 lata, minus alta, costis subobsoletis. Long. (/ 7 — io'5 mm. % 8 — 14 mm. 



Black, the wings infuscate, and with a blue (but not bright) iridescence. A 

 small median spot behind the antennae, and another behind each eye, often flavous. 

 Apex of clypeus depressed, and lightly emarginate. Mesothorax finely, but very 

 densely rugosely-punctate, the punctures generally rather larger in the ^. Post- 



