HYMEls'OrTEIlA FROM THE SANDWICH ISLANDS. 



G79 



the second segment ; the third and following segments Avitli 

 stronger punctures than the first or second ; the apical margins 

 o£ the first and second segments with white fasciae, that on the 

 first narrower than that on the second. 



The male only differs in the usual sexual difference in the struc- 

 ture of the antennie and abdomen ; but the white bands on the 

 abdomen are narrower, and the basal segment is rounded, not 

 truncate. 



Hah. Kauai. 



Abundant on the island Kauai, but not found anywhere else. 



(r. B.) 



Odtneetjs maueus, n. sp. Female. Length G| lines. En- 

 tirely black, with dark fuscous wings that have a violet iridescence, 

 and some semifusco-hyaline spots about the second and third sub- 

 marginal cells. The head and thorax very closely punctured ; the 

 clypeus with stronger punctures, its aj)ex truncate, concave, and 

 with the lateral angles sharp and apparently bidentate. Thorax 

 — the scutellum flattened; the postscutellum rugose, and with 

 the margin crenulated; the metathorax truncate, having a central 

 longitudinal channel, on each side of wliich it is obliquely rugose- 

 striate. Abdomen — the basal segment obtusely rounded, not 

 ridged, and, as well as the second segment, with very fine, distant, 

 shallow punctures ; the apical margin of the second segment and 

 the following segments with distant large shallow punctures. 



The male is smaller, but closely resembles the female ; the hooked 

 joint at the apex of tlie antennse is ferruginous. 



Sal. Honolulu &c. 



Apparently common all over the Archipelago, constructing 

 mud-nests of 1 to 10 cells against stones, trunks of trees, &c., 

 under eaves of houses, often inside houses. {T. B.) 



Group o/'Odynerus vagus, Saussure's American Wasps, p. 314. 



ODTNERrs EUBJiiTiNCTUS, u. sp. Female. Length 4 J lines. 

 Black, with the postscutellum, the metathorax, basal segment 

 of the abdomen, and the lateral and apical margins of the 

 second segment dark blood-red. Head — a triangular red 

 spot at the insertion of the antennse above ; the clypeus con- 

 vex, narrowed anteriorly, its apex truncate, the lateral angles 

 of the truncation subdentate. Thorax — a red spot beneath 

 the wiiigs, and a minute one on the tegulse in front and behind ; 

 the thorax, as well as the head, closely and not very strongly 



