HYMENOPTERA 49 



punctured. Mesothorax with a somewhat coarse and close puncturation, the surface 

 somewhat shining and the system of minute punctures evident. Abdomen with the 

 basal segment closely and distinctly punctured ; second simply convex longitudinally 

 above ; beneath, the sulcature shining, without any costae, and the part of the segment 

 behind it very strongly and abruptly raised, subprominent in the middle in front, the 

 depression wanting. 



Hab. Molokai mountains (3000 ft.). Rare. 2 d" 2 ? taken. 



(37) Odyiierns homceogaster, sp. nov. 



Praecedenti forma similis, sed antennarum articulo basali antice, et margine seg- 

 menti primi abdominis postice, rubris. </ ? . Long. 8 — 9 mm. 



Perhaps only a subspecies of the preceding, but readily distinguished by the red 

 line on the scape of the antennae in front, and the red apical margin of the basal 

 abdominal segment. In the ? the abdominal band is interrupted, and less conspicuous 

 than that of the i. 



Hab. lao Valley, Maui. 4 </ i ?. 



{^%) Odyiierus hcierochromus, sp. nov. 



Niger, opacus, alis caeruleo-iridescentibus. Abdominis segmentum secundum ut 

 in O. homoeogasteri fere formatum. Thorace opaco et colore bene distinguendus. 



Var. (/. Segmentum abdominis basale postice flavo-marginatum. (/?. Long. 

 6^ — 8^ mm. 



Black, c/" very rarely with the apical margin of the basal segment of the abdomen 

 pale, and sometimes with a small pale median spot just behind the antennae. 



Apex of the clypeus slightly dentately-emarginate ; head above the antennae dull 

 with shallow and very close puncturation. Mesothorax dull, rather coarsely punctured 

 in the (/, in the ? the punctures are finer, sparser and less distinct. Scutellum in the 

 (/ closely punctured, less closely and much more finely in the ?. Propodeum towards 

 the sides in front rough with large shallow feebly-impressed punctures. Abdomen with 

 the basal segment closely, but not deeply, punctured ; second segment above not raised 

 from the base ; beneath, exceedingly strongly raised from the sulcature, the costae 

 subobsolete, and the depression wanting, or represented only by a faint longitudinal 

 impressed line. 



Hab. Kilauea, Hawaii (4000 ft.). Common ; burrows in dead tree trunks. I did 

 not meet with it on the leeward side of the island. 



p. F. H. 7 



