l.U) KUMBNIDJi:. 



POCOTid S(>ijmpnt of tho iibdomoii 1ms u hirj^cr spot iit the sides, and 

 no roil b;md on iho apk-id margin. 



11 ah. Kauai. 



Tills species is not rare on Kauai. 



Group of Odyuerus totonacus, Saussurcs American Wasjjs, p. 340. 



4. Odynerus montanus. 



Female. Length lines. — Entirely black and shining; wings deep 

 hrown-hlack, with a violet iridescence, very brilliaiit ; the stigma 

 and costal nervures bright steel-blue. The clypeus convex, finely 

 punctured, with the apex truncate. Thorax not so strongly or 

 closely punctured as the head ; the scutellum flat, the postscutellum 

 slightly convex, shining, and sparingly punctured ; the metathorax 

 concave-truncate, having a central longitudinal channel ; obliquely 

 ruguloso in the middle, the sides coarsely rugose. The first seg- 

 ment of the abdomen campanulatc, strongly but not very closely 

 punctured, the apical margin rebordered ; the second segment very 

 convex, elevated to a subconical shape, finely and not very closely 

 punctured ; its apical margin, as weU as the following segments, 

 with larger shallow punctures. 



Male. Length 5| lines. — Closely resembling the female ; the cly- 

 peus more strongly punctured, the terminal hook of the anteuntc 

 rufo-piceous ; the thorax and abdomen as in the female. 



Hah. Mountains of Oahu, where it is common. 



5. Od3merus congruus. 



Female. Length 4| lines. — Black, punctured, and shining; the 

 wings fusco-hyaline, with a dark fuscous stain along the anterior 

 margin of the front pair. The head with distant fine punctures ; 

 the clypeus very convex, and with a small truncate projection at 

 its apex : impunctate, or with only a few very fine distant punc- 

 tures. Thorax smooth and shining above, ha\'iug only a few very 

 fine shallow punctures ; the scutellum sUghtly convex ; the meta- 

 thorax opaque, oblique, and with shallow rather large indentations, 

 the lateral margins rounded, without any excavation ; the claws 

 of the tarsi ferruginous. Abdomen with the first segment cam- 

 panulate, as long as broad, finely, evenly, but not very closely 

 punctured ; the second segment large, impunctate, or with only a 

 few very fine shaUow punctures, its apical margin, as well as the » 

 following segments, with shallow fine punctures. % 



Male. Smaller than the female, but of the same form and similarly 

 sculptured ; differs in having at the apex of the clypeus two little ■ 

 pale yellow lines, and also a small ovate yeUow spot just above the 



