214 MESSRS. T. BLACKBURN AND P. CAMERON ON THE 



male (possibly a distinct species) which seems a little more 

 strongly punctured, and has the basal segment of the hind 

 body margined with testaceous behind. I have also a 

 female differing from the type in having the apex of the 

 elypeus (as well as the mandibles) red. One specimen 

 departs from the type in having the clypens somewhat 

 more deeply emarginate, in one or two the tuberculate 

 form of the second segment of tlie hind body is only 

 feebly developed, in another the wings are almost devoid 

 of colouring, and in another one mandible is black. 



23. Odynerus haleakalcB. 



0. haleakala, sp. nov. Subnitidus, subtiliter pubescens, 

 niger; mandibulis plus minusve rufis ; alis violaceis ; 

 clypeo minus emarginato ; capite thoraceque crebre 

 fortiterque punctatis ; abdominis segmento primo 

 transverso, antice parum verticali, crassius nee fortiter 

 punctato ; segmento secundo tuberculato-elevato. 



Long, c^ 12 millim., V 15 millim. 



Both head and thorax have a double system of punctu- 

 ation. On the head the larger punctures are so close and 

 deep that the finer ones need looking for ; on the thorax 

 (including the scutellum) the larger ones are more sparing, 

 while the smaller ones are more noticeable on the pro- 

 thorax, but become less so backwards, being scarcely 

 discoverable on the metathorax. The first segment of the 

 hind body is rather strongly transverse, much rounded 

 off {i. e. not vertical) in front, and is only sparingly, 

 though rather strongly, punctate. The second segment is 

 rather strongly elevated into a tubercular shape ; it is very 

 finely and sparingly punctate to near the hind margin, 

 where the punctuation becomes coarse. The next three 

 segments are coarsely punctate. The apical joint of the 



