64 FAUNA HAWAIIENSIS 



(66) Odynerus ivaianaeanus, sp. nov. 



Ni'o-er, alis nitide fuscis, baud caeruleo-iridescentibus, abdominis segmento primo 

 postice flavo-marginato. Clypeus leviter dentato-emarginatus. Mesonotum minus ni- 

 tidum, subfortiter punctatum. Abdominis segmentum 2 ventrale depressione angus- 

 tissima, haud alta. (/. Long. 7 mm. 



Male black, the wings fuscous, iridescent, but not blue ; basal segment of the 

 abdomen narrowly pale along its posterior margin. Clypeus slightly dentately-emar- 

 ginate at the apex, head above the antennae closely punctured. Mesothorax slightly 

 shining, somewhat coarsely and closely punctured. Propodeum with the surface some- 

 what smooth and bearing some large and very shallow punctures. Basal segment 

 of the abdomen as long as wide in dorsal aspect, depressed along the apical margin, 

 with shallow irregular punctures. Second evidently raised from the base ; beneath 

 with the depression very shallow and narrow. 



Hab. Waianae, Oahu, on the coast. 1 (/ taken. 



(67) Odynerus floscuhis, sp. nov. 



Praecedenti simillimus, abdominis segmentis duobus basalibus postice albo-margi- 

 natis. i. Long. 7 mm. 



Very like the preceding, of which it may possibly be a variety. It differs in 

 having a rather wide yellowish-white apical band on the second segment of the 

 abdomen, which is continued on the ventral surface. The mesothorax posteriorly 

 is rather more rugosely punctate, and the depression of the second ventral segment 

 is more definite, with a well-marked impressed median line. 



Hab. Waianae, Oahu, on the coast ; i i taken. 



(68) Odynerus cooki, sp. nov. 



Niger, alis fuscis, nitentibus, iridescentibus, haud caeruleis ; abdominis segmentis 

 duobus basalibus postice flavo-marginatis. Mesonotum opacum, subtilius punctatum. 

 Abdominis segmentum secundum longitudinaliter convexum ; subtus, costis validis> 

 depressione nulla, t/. Long. 5 — 6 mm. 



Male black, the wings shining, fuscous, iridescent, but not blue. Apical margin 

 of each of the two basal abdominal segments narrowly yellowish-white. A minute 

 median spot behind the insertion of the antennae, and one behind each eye of the 

 same colour. Clypeus slightly dentately-emarginate. Head above the antennae with 



