HYMENOPTERA 63 



This species is very closely allied to the preceding, but may be distinguished by 

 the more shining mandibles, the duller surface of the mesothorax, which is more 

 finely and rather more deeply punctured, and by the deeper depression of the second 

 ventral segment of the abdomen. 



(64) Odynenis pteropkaennes, sp. nov. 



Niger, nitidus, alls fuscis, micantibus, clypei apice truncato. Mesonotum nitidum 

 sparsim irregulariter punctatum ; propodeum laeve, haud dense punctatum. Abdominis 

 segmentum secundum subfortiter elevatum, nitidum, puncturatione fere obsoleta ; 

 subtus, depressione minus lata. ?. Long. 7-5 mm. 



Female black, shining ; wings fuscous, darker along the costal margin. Clypeus 

 truncate at the ape.x, head above the antennae smooth and shining, with shallow 

 punctures. Mesothorax shining, with fine sparse and irregular puncturation, propo- 

 deum smooth, but less shining than the rest of the thorax, with evident, but shallow, 

 punctures. Abdomen shining, nearly vertical in front, coarsely punctured at the base, 

 the punctures decreasing in size towards the apex ; second segment rather abruptly 

 raised from the base, with very fine indistinct punctures, even to the apical margin ; 

 beneath, with the depression narrow and not deep. 



Hab. Oahu, a single ? taken in March, 1893, on the coast at Waialua, and a 

 second in the Waianae Mountains (2000 ft.) in February, 1896. 



(65) Odynerus iopteryx, sp. nov. 



Niger, alis infuscatis, caeruleo-iridescentibus. Clypeus apice truncato ; meso- 

 notum subnitidum, sparsim subtiliter punctatum ; propodeum opacum et rugosum. 

 Abdominis segmentum primum juxta basim grosse, secundum vel ad apicem vix 

 punctatum. ?. Long. 7 mm. 



Female black, the wings infuscate and with blue iridescence. Clypeus truncate 

 at the apex ; head above the antennae shining, with close and very shallow punc- 

 tures. Mesothorax not very shining, finely and sparsely punctured, and with a distinct, 

 but extremely fine, interstitial puncturation ; scutellum with a few very feeble fine 

 punctures ; propodeum dull and rugose. Basal segment of the abdomen with very 

 coarse shallow punctures at the base, less coarse towards the apex; second segment 

 very strongly convex longitudinally from the base, its surface shining and without a 

 definite puncturation, although in certain aspects traces of nearly obsolete punctures 

 can be discerned ; beneath, at the sides, it is raised from the apices of the costae to 

 about the height of its basal portion, the depression shallow. 



Hab. A single ? taken in the Waianae Mountains, Oahu, in April, 1892, at an 

 elevation of over 2000 ft. 



