HYMENOPTERA 



43 



distincte punctatum. Abdominis segmentum primum minus dense punctatum ; secun- 

 dum a basi elevatum, subtus, costis obsoletis, (vel fere obsoletis), sulco nitido. i%. 

 Long. 8 — lo mm. (Plate I. fig. 22 and 22«.) 



Black and shining, the wings dark with bright blue iridescence. Mandibles for 

 the most part red. Clypeus very slightly emarginate in the c/", the head above the 

 antennae densely punctured. Mesothorax shining, with distinct regular punctures in 

 front, which posteriorly towards the middle become scanty. Scutellum punctured, 

 more largely in the <} than the % ; propodeum smooth and punctured. Abdomen 

 shining, basal segment very distinctly, but not densely punctured ; the second raised 

 from the base but not abruptly ; beneath with the costae obsolete or nearly so, the 

 sulcature very shining, the depression meeting it rather widely, and the sides of the 

 segment rather abruptly raised from it, though not strongly, hardly attaining the 

 height of its basal portion. 



Hab. Molokai, Lanai and Maui, in the mountain forests (2000 — 4000 ft.). 



(26) Odynerus moiitamis. 



Odynerus montamcs. Smith, J. Linn. Soc. xiv. p. 680. Blackburn and Cameron, 

 P. Manch. Soc. xxv. p. 158. 



Niger, subnitidus, alis caeruleo-iridescentibus. Clypeus vix emarginatus. Meso- 

 notum subnitidum, distincte minus dense punctatum. Propodeum opacum et rugo- 

 sum. Abdominis segmentum secundum plus minusve (cf subfortiter) elevatum; subtus, 

 depressione lata, minus alta. c/?. Long. 7 — 11 mm. 



Black, somewhat shining, wings dark and brightly iridescent. Clypeus hardly 

 emarginate at the apex. Head above the antennae deeply, closely and distinctly 

 punctured (rather more largely in the </). Mesothorax rather shining, distinctly but 

 not coarsely punctured, somewhat remotely in the ?, more closely and rather more 

 largely in the c/'. The minute interstitial puncturation is shallow and not dense, but 

 very evident. Propodeum dull or nearly so, and rugose. Abdomen with the basal 

 segment distinctly and evenly punctured ; second raised from the base, more strongly 

 but not very abruptly in the c/ ; beneath, with the depression shallow, but rather wide ; 

 the costae well developed. 



Hab. Oahu, on the coast and in the mountains. 



(27) Odynerus unictis, sp. nov. 



c/ niger, nitidus, alis caeruleo-iridescentibus. Clypeus levissime emarginatus. 

 Frons minus fortiter punctata. Mesonotum subnitidum, sparsim subtiliter punctatum. 

 Propodeum laeve, antice (ad latera) impunctatum, concavitate sparsim minus fortiter 



6—2 



