72 FAUNA HAWAIIENSIS 



haud elevatum; subtus depressione minus lata. d"?. Long. 8 — 17 mm. (Plate I. 



fig- I5-) 



Allied to the preceding species, but with the abdominal bands wider. The 



scutellum is more rugosely punctured, and the basal segment of the abdomen is 



differently formed, being somewhat depressed from the base to the apex, and where 



the anterior and dorsal surfaces meet a comparatively sharp edge is formed, instead 



of this part being evenly rounded off. The depression of the second ventral segment 



is much less wide at its base, occupying only about the middle third of the segment, 



and the middle costa of the series is conspicuously long. The abdomen is altogether 



more shining, as also the surface of the mesothorax of the ? . 



Hab. Mountains of Kauai. Not rare. 



The following five species of the genus Odynerus were brought back by the 

 Beechey expedition many years ago. Probably all were collected at or near Honolulu, 

 and most if not all of them are in that case now extinct. Neither the Rev. T. 

 Blackburn nor myself have met with any of these species. The descriptions of the 

 first two are copied from de Saussure's Etud. Fam. Vesp. (Pt. iii.). The types 

 were originally in the British Museum, but apparently no longer exist. A single 

 insect in that collection was assigned to O. nautarum, de Sauss. but does not agree 

 with the description. Under the name O. sandwichensis, de Sauss. (or rather sand- 

 ivithii !), were placed several insects of three quite distinct species, none of which 

 could possibly have been the subject of de Saussure's description, 



"Etud. d. Fam. Vesp. (Pt. in.). Mon. Masar. et Suppl. p. 289. Div. Anto- 

 dynerusy 



(82) " O. nautarum, n. sp." 

 " Niger signaturis flavis : abdo^ninis fasciis djiabus fiavisT 

 "Long. 9 mm.; env. 18 mm." 



"Male. Formes allongees de XO. punctnm. Metathorax arrondi, lisse au milieu. 

 Chaperon bitubercule au bout. Insecte noir, lisse ; le metathorax seul ponctue. 

 Chaperon, un point au haut des mandibules, devant du premier article des antennes, 

 jaunes. Deux taches sur le prothorax, ecaille, un tache sur I'aile, postecusson et 

 une bande interrompue sur lecusson, jaunes. Les deux premiers segments de 

 I'abdomen orn(^s d'un large bordure jaune. Pattes noires ; les tibias seuls, jaunes 

 d'un cote ; tarses noirs. Ailes hyalines, la cote enfumee, et le bout un peu violet. 



Var. Ecailles, (icusson, et antennes noires. 



Habite: Les iles Sandwich. (Musee de Londres.)" 



