ODTNEETJS. 137 



insertion of the antennae ; the terminal hook of the antennae and 

 claw- joint of the tarsi ferruginous. 



Hah. Honolulu. 



This species is not rare. 



6. Odynerus duhiosus. 



Male. Length 4 lines. — Black, with fuscous wings, not very dark, 

 hut with bright violet iridescence. Head closely punctured ; the 

 clypeus impunctate, or with a few very fine shallow punctures, its 

 apex notched above, giving it the appearance of being bidentate ; 

 the terminal hooks of the antennse pale at their tips. Thorax 

 punctured, but not strongly so ; the lateral angles of the prothorax 

 acute ; the scutellum and postscutellum only slightly convex and 

 sparingly punctured ; the metathorax with confluent rather shallow 

 punctures, concave in the middle, with the sides rounded ; the scu- 

 tellum with a central longitudinal impressed line. Abdomen with the 

 first segment campanulate, as broad as long, and evenly punctured ; 

 the second segment large, convex, the sides rounded, impunctate, 

 or with only a few very fine shallow punctures ; the following seg- 

 ments with fine shallow punctures, but stronger than those on the 

 second segment. 



Hab. Honolulu. 



7. Odynerus agilis. 



Male. Length 4| lines. — Black, with a narrow yellow fascia on the 

 apical margins of the first and second segments. Head very closely 

 punctured ; a minute yeUow spot between, but a little above, the 

 insertion of the antennae ; the clypeus very convex and bidentate 

 at the apex ; the terminal hook of the antennae obscurely testa- 

 ceous ; the entire insect with a fine cinereous pile, which is most 

 dense on the head and thorax. The scutellum rather convex, and 

 with a central longitudinal impressed line ; the metathorax con- 

 cave-truncate ; wings subhyaline, with a fuscous line along the 

 costal and marginal cells ; the wings iridescent. Abdomen with 

 the basal segment campanulate and with very shallow punctures ; 

 the second segment with very fine shallow punctures ; the apical 

 segments with shallow punctures. 



Hah. Maui. 



The Eev. T. Blackburn states that this species is apparently rare. 

 He has not seen the female. 



