HYMENOPTERA 65 



obscure, ill-defined punctures. Mesothorax dull, somewhat finely and not closely 

 punctured, the punctures shallow. Propodeum dull, with the posterior concavity ru- 

 gose. Basal segment of the abdomen transverse in dorsal aspect, with shallow punc- 

 tures ; second simply convex longitudinally above ; beneath with the costae strong, 

 followed by a smooth space in the part usually occupied by a depression, which in 

 this species is wanting, the segment being nearly flat beyond the costae and not 

 elevated even at the sides. 



Hab. Kealakeakua bay, Hawaii ; cT only taken, close to the monument erected 

 to Captain Cook. 



(69) Odynerits accelogasier, sp. nov. 



Niger, alls infuscatis, subcaeruleo-iridescentibus, clypeo, fronte, tegulis, post- 

 scutello, tibiisque flavo-notatis, abdominis segmentis duobus basalibus postice flavo- 

 marginatis. Clypeus apice truncato. Mesonotum vix nitidum, distincte, sed postice 

 minus aequaliter, punctatum. Abdominis segmentum 2 ventrale costis parte sua basali 

 brevioribus, post has subplanum, depressione obsoleta. </. Long. 7'5 mm. 



Male black, the clypeus, a median spot behind the antennae, one on the tegulae, 

 the postscutellum, the tibiae more or less above, and the hind margin of the two 

 basal abdominal segments, pale yellow. Wings infuscate and with a blue irides- 

 cence. Apex of clypeus truncate. Mesothorax slightly shining, distinctly and rather 

 finely punctured, more sparsely posteriorly than in front. Propodeum dull, somewhat 

 finely rugose. Basal segment of the abdomen with shallow punctures ; second some- 

 what raised from the base ; beneath, with the costae short, shorter than the basal 

 portion of the segment, which is tumid ; beyond the costae the segment is nearly 

 flat, and without any definite depression. 



Hab. Waianae, near sea-level ; i c/ taken. The markings would probably vary 

 in a series, but the species is very distinct structurally. 



(70) Odynerus vittativentiHs, sp. nov. 



Niger, alis infuscatis caeruleo-iridescentibus, abdominis segmentis duobus basa- 

 libus postice albo-marginatis. Mesonotum dense distincteque nee grosse punctatum. 

 Propodeum sublaeve, vix evidenter punctatum. Abdominis segmentum 2 ventrale 

 costis brevissimis, sat fortibus, parte sua basali tumida, post costas depressione nulla. 

 </?. Long. 8 — 10 mm. (Plate L fig. 29 and 29^.) 



Black, the wings infuscate, and with blue iridescence, the two basal segments 

 of the abdomen with yellowish-white apical bands, that on the second the wider. 

 Clypeus slightly dentately-emarginate in the (/, truncate or nearly so in the ?. 

 p. F. H. 9 



