71 



Hab. Mountains of Oahu, widely distributed, but not 

 abundant. 



Odynerus eucharis. 



Very like O. homoeophanes but of smaller average size, the wings are 

 less infuscate, the clypeus of the male is only spotted with red, that of 

 the female resembling it or being wholly black, there is no red line in the 

 emargination of the eyes, and the mesonotum is without the red discal 

 and marginal lines. The puncturation of the mesonotum though very 

 dense is distinct, being less rugose, that of the second abdominal segment 

 fine and not close, except on the apical red band; its impression behind 

 the costae is more punctate, but more shining. Length 7.5-10 mm. 



Hab. Mountains of Oahu, widely distributed but not 

 abundant. 



Odynerus pseudochromoides sp. nov. 



So like O. pseudochromus that it is only necessary to point out the 

 distinguishing characters. The red prothoracic markings are continued 

 backwards to reach the tegulae, the costae of the second ventral segment 

 are moderately distinct and the surface between them is shining. In 

 the female the mesothorax is also usually more shining. Length 7-10 mm. 



Hab. Mountains of Oahu, common and generally dis- 

 tributed. 



Odynerus paludicola. 



Female: black with a red median frontal spot, a small spot on each 

 side of the thorax touching the tegulae and the hind margin of the first 

 abdominal segment red. Clypeus finely, head in front coarsely and 

 closely punctured. Mesonotum shining, somewhat irregularly punctured, 

 the minute punctures between the large ones easily seen with a powerful 

 lens, but not dense; propodeum smooth and shining with large feeble 

 punctures which become dense and more distinct in the concavity. Basal 

 abdominal segment with shallow, even puncturation; second rather 

 strongly convexly raised from the base; beneath, greatly raised above 

 the costae, the latter fine but mostly distinct, the depression very narrow, 

 the segment prominent on either side of it. Wings shining fuscous, 

 without blue iridescence. Length 9 mm. 



Hab. Oahu mountains 2000 ft. ; not common. 



Odynerus paranaias sp. nov. 



Black, with shining fuscous wings, without the iridescence, the male 

 with a red dot behind each eye, and the pronotum, mesopleura, and 

 post-scutellum with red markings, as well as a red apical band on the 

 first and traces of one at the sides of the second abdominal segment. 

 Clypeus of male very deeply emarginate, of the female strongly and 

 dentately, its sculpture consisting of fine and excessively minute punctures 



