HYMENOPTERA 53 



Black, the wings with blue iridescence, the apical margins of the two basal 

 segments of the abdomen pale yellow. 



Clypeus distinctly emarginate at the apex ; the head above the antennae closely 

 and distinctly punctured. Mesothorax more or less shining, sparsely irregularly and 

 not coarsely punctured (in the % generally more finely and sparsely than in the (/) ; 

 between these punctures with a fine and close puncturation, which is generally clearer 

 in the ? than in the cf. Propodeum dull, and more or less rugose towards the 

 sides. Basal segment of the abdomen with shallow punctures ; second abruptly and 

 rather strongly raised from the base ; beneath, finely punctured, and abruptly raised 

 from the apices of the costae, the depression narrow. 



Hab. Haleakala, Maui. In the higher forest, and above it to an elevation of 

 8000 ft., and also in the summit crater. 



(45) Odyncrus dryas, sp. nov. 



Niger, alis infuscatis, caeruleo-iridescentibus, capite, thorace et abdomine rufo- 

 notatis. Pronotum rufo-maculatum. Abdominis segmentorum 2 basalium apices 

 rufo-marginati. Mesonotum nitidum, sparsim irregulariter punctatum. Abdominis 

 segmentum secundum elevatum ; subtus depressione sat lata. c/?. 7 — 8 mm. 



Black, the wings infuscate and with blue iridescence. A median spot on the 

 head behind the antennae, two large ones on the prothorax, one below each of the 

 tubercles, sometimes one on each of the tegulae, the postscutellum, two spots some- 

 times on the scutellum, the propodeum more or less at the sides, of a bright red 

 colour. Basal segment of the abdomen with an apical red band strongly dilated at 

 the sides, and the apical margin of the second of the same colour. 



Mandibles black. Clypeus very slightly dentately-emarginate ; head above the 

 antennae closely punctured. Mesothorax smooth and shining, somewhat finely ir- 

 regularly punctured, the surface between these punctures with very minute but quite 

 evident puncturation ; scutellum sparsely punctured ; propodeum with the posterior 

 concavity closely punctured. Abdomen with the basal segment coarsely and evenly 

 punctured ; second raised from the base but not very strongly ; beneath, at the sides, 

 raised from the apices of the costae to about the height of the basal portion of the 

 segment, the depression wide but not deep. 



Hab. Haleakala, Maui, 5000 ft. 3 J' 1 ?. 



(46) Odynerus erythrostactes, sp. nov. 



Niger, alis infuscatis, caeruleo-iridescentibus, fronte, pronoto, tegulis, mesopleuris 

 et postscutello rubro-notatis. </ tibiis anticis saepe, intermediis posticisque rarius, 

 articuloque basali antennarum plus minusve, rubro-lineatis. Abdominis segmentum 



