62 FAUNA HAWAIIENSIS 



(62) Odyneriis dubiosus. 



Odynerus dubiosus. Smith, Proc. Linn. Soc. xiv. p. 681. Blackburn and Came- 

 ron, 1. c. p. 155. 



Niger, alis fuscis, liaud caeruleo-iridescentibus. Mesonotum vix nitidum, </ sub- 

 grosse, ? sLibtilius punctatum. Abdominis segmentum primum juxta basim grosse 

 punctatum ; secundum longitudinaliter convexum, vix elevatum ; subtus, depressione 

 distincta, sat lata. i%. Long. 6 — 8 mm. 



Black, the wings shining fuscous, without blue iridescence. Apex of clypeus 

 depressed, hardly emarginate, head above the antennae with close and very shallow 

 punctures. Mesothorax with the surface very slightly shining, somewhat coarsely 

 punctured, but not deeply. Propodeum with very shallow punctures, giving it a more 

 or less rugose appearance. Basal segment of the abdomen coarsely punctured at the 

 base, the punctures becoming finer towards the apex ; second segment hardly raised 

 from the base, but longitudinally convex ; beneath, with a very distinct depression, 

 which is wide in front. 



Hab. Honolulu, Waianae, &c., Oahu ; on the plains. Very abundant round walls 

 built of lava, in the holes of which it forms its cells. 



(63) Odynerus threnodes, sp. nov. 



Niger, opacus, alis fuscis, subaeneo-micantibus. Clypeus vix emarginatus. Meso- 

 notum opacum, crebre, aequaliter, nee grosse, punctatum. Abdominis segmentum 

 secundum minus elevatum ; subtus, depressione lata, sat alta, costis oblique occurrente. 

 ?. Long. 6"5 — 8 mm. 



Female black, with the wings shining fuscous and with a slight bronzy tint in 

 certain aspects. Mandibles black, reddish at the tips ; clypeus depressed at the apex, 

 hardly emarginate ; head above the antennae dull, with close but shallow punctures. 

 Mesothorax dull, for the most part evenly and rather finely punctured ; propodeum 

 with the surface finely rugulose, the puncturation nearly obsolete. Basal segment of 

 the abdomen in dorsal view about as long as wide, closely and shallowly punctured, 

 the punctures coarser than those of the mesothorax ; second segment scarcely raised 

 from the base, hardly more than ordinarily convex ; its sides beneath rather strongly 

 raised from the apices of the costae, attaining a height evidently greater than that of 

 the basal portion of the segment, the depression somewhat wide and deep, meeting 

 the apices of the costae obliquely. 



Hab. Waianae Mountains, Oahu (2000 ft. or more). 2 ?. 



