6o FAUNA HAWAIIENSIS 



second more finely so, somewhat strongly convex at the base in the i, less strongly 

 in the ? ; beneath with a well-marked deep depression, meeting the apices of the 

 costae widely at its base. 



Hab. Kona district of Hawaii, on the coast, and in the mountains up to an 

 elevation of 3000 ft. or more. Oahu } Beechey e.xpedition. In the British Museum. 



(58) Odynerus dyserythrias, sp. nov. 



Niger, alis infuscatis, caeruleo-iridescentibus, abdominis segmento secundo 

 subtus rubro, nonnunquam lateribus ejus rubro-maculatis ; mandibulis rufis. Clypeus 

 distincte dentato-emarginatus. Caput supra antennas confertissime, mesonotum dense 

 fortiterque punctatum. Propodeum rugosum. Abdominis segmentum 2 ventrale 

 depressione angustula, minus alta. </. Long. 8 mm. 



Male black, the abdomen entirely black above, or with a red spot at the sides 

 of the second segment, which beneath is nearly entirely red. Mandibles red, the 

 clypeus distinctly dentately-emarginate ; head above the antennae very densely 

 punctured ; mesothorax deeply and closely (more densely in some examples than in 

 others), the interstices between these punctures somewhat shining and minutely 

 punctured ; scutellum very distinctly punctured, but more finely than the mesothorax ; 

 propodeum rugose. Abdomen with the basal segment closely and evenly punctured ; 

 second segment beneath raised at the sides above the apices of the costae to about 

 the height of its basal portion, the depression feeble, with a more deeply impressed 

 median line. 



Hab. Kilauea, Hawaii (4000 ft.). Eight or nine cf taken, but no ?. 



(59) Odynerus cyanopteryx, sp. nov. 



Niger, alis infuscatis, caeruleo-iridescentibus, mandibulis cum apice clypei rufis, 

 abdominis segmenti secundi lateribus rubro-maculatis. Mesonotum opacum, subtilius, 

 sat distincte punctatum. Abdominis segmentum secundum juxta basim subelevatum ; 

 subtus, costis brevissimis, depressione levissima et angustissima. c/ ? • Long. 7 — 9 mm. 

 (Plate L fig. 28 and 28«.) 



Black, the wings with bright blue iridescence, the thorax entirely black, as also 

 the basal segment of the abdomen. Mandibles and apex of clypeus red. Second 

 segment of the abdomen with a red spot at the sides in front, and more or less red 

 on its ventral surface. In one example these markings are very obscure, but they 

 can be seen in a favourable light. Apex of clypeus very slightly dentately-emarginate ; 

 the head above the antennae dull, and shallowly punctured. Mesonotum not coarsely. 



