HYMENOPTERA . 57 



Very closely allied to the preceding but readily distinguished by the red mark- 

 ings of the prothorax. The mesothorax in front is rather less coarsely punctured, 

 the punctures are deeper and more distinct, being more distant. The structure of 

 the second ventral segment of the abdomen is very similar in the two species. 



Hab. Haleakala, Maui (4000 — 5000ft.). Rare. 3?. 



(52) Odyneriis petrobiiis, sp. nov. 



Niger, subnitidus, alls infuscatis, caeruleo-iridescentibus. F" route, mesopleuris, 

 tegulis, nonnunquam scutello, postscutello, et propodeo, rubro-notatis. Segmentum 

 abdominis primum late rubrum ; secundum lateribus nonnunquam rubro-maculatis. 

 Caput cum mesonoto grosse denseque punctatum. Segmentum abdominis secundum 

 vix elevatum ; subtus, depressione lata, c/ ? . Long. 5 — 8 mm. 



Black, the wings with blue iridescence. The front of the head, the tegulae, 

 mesopleurae, sometimes the scutellum, the postscutellum, the propodeum at the 

 sides, the basal segment of the abdomen over a large part of its surface, and some- 

 times the sides of the second, have red markings. The prothorax and apical margin 

 of the second abdominal segment are black. Clypeus truncate or very slightly 

 emarginate at the apex ; head coarsely and very closely punctured, especially in the 

 c(*. Mesothorax with close and large puncturation, less regular posteriorly in the ? ; 

 scutellum punctured, generally more finely in the ? than in the <} . Propodeum with 

 shallow, large punctures. Basal segment of the abdomen with coarse punctures, 

 especially towards the base ; second segment convex, hardly raised ; beneath with 

 the depression wide and rather deep, the segment at the sides being raised from 

 the apices of the costae to a height equal to, or rather greater than, that of its 

 basal portion. 



Hab. Molokai coast, and in the mountains as high as 3000 ft. 



(53) Odynenis rubropustulatus. 



Odyneriis rubropustulatus, Blackburn, P. Manch. Soc. Vol. xxv.. Session 1885 — 



1886, p. 159. 

 Niger, rubro-notatus, alis infuscatis caeruleo-iridescentibus, praecedenti simillimus, 

 mesonoto minus dense punctato, thorace toto cum propodeo nigro bene distin- 

 guendus. i % . Long. 6 — 8 mm. 



Very closely allied to the preceding, the wings with a similar bright blue 

 iridescence. The thorax is rather less shining between the punctures, which are 

 r. F. H. 8 



