42 FAUNA HAWAIIENSIS 



closely, evenly, and distinctly punctured, the interstices with a dense minute 

 puncturation. Scutellum with a very similar puncturation. Propodeum rugose from 

 large subobsolete punctures. 



? with the head above the antennae closely punctured, the interstices with very 

 distinct minute puncturation. Mesothorax dull, closely and evenly punctured at least 

 on the front half, the minute system of punctures between the larger ones, very 

 dense and distinct. Scutellum more finely, but distinctly punctured. Propodeum as 

 in the (/. Basal segment of the abdomen with shallow even puncturation, second 

 simple above, beneath, with the depression wide at the base but very faint. 



Hab. Lanai, on the coast, and Wailuku, Maui. 



The specific name ' agilis ' given to this species by Smith had already been 

 used by him for a species of the same genus found in the Aru Islands. 



(24) Odynerus nubicola, sp. nov. 



Niger, opacus, alis subhyalinis, vix iridescentibus ; frons cum pronoto plerumque 

 flavo-notata. Abdominis segmentum primum et secundum margine apicali flavo. 

 Clypeus leviter emarginatus. Mesonotum opacum, antice subaequaliter, post medium 

 sparsim, obscure punctatum. Abdominis segmentum secundum baud elevatum, subtus 

 depressione levissima, nonnunquam fere obsoleta. (/?. Long. 7 — 9 mm. (Plate I. 

 fig. 21 and 21 rt.) 



Black, a median spot behind the antennae, two on the prothorax (rarely absent), 

 and the apical margin of the two basal abdominal segments, yellow. Mandibles dark. 

 Clypeus in both sexes emarginate at the apex, but not deeply, very convex longi- 

 tudinally. Head above the antennae dull, especially in the (/, with both systems of 

 puncturation evident. Mesothorax very densely and finely punctured between the 

 larger punctures, which are very shallow and subobsolete, and still further obscured in 

 the c/' by the appressed fuscous pubescence. The larger punctures themselves are 

 sparse and irregular on the posterior half of the mesothorax, but more regular in 

 front. Abdomen with the basal segment coarsely and shallowly subrugosely punctured ; 

 second simply convex above, beneath, with the depression very feeble, often hardly 

 evident except for a median longitudinal impressed line, the segment rising from the 

 apices of the costae only with the slight convexity of its surface. The wings in 

 both sexes are subhyaline with hardly any iridescence. 



Hab. Haleakala, Maui. Common above the forest belt up to the summit, and 

 also within the crater. 



(25) Odynerus ecostatus, sp. nov. 



Niger et nitidus, alis caeruleo-iridescentibus. Mandibulae ex majore parte rufae. 

 Clypeus vix emarginatus. Mesonotum antice aequaliter, postice circa medium sparsim, 



