SMITH ON HYMENOPTEKA OE ARU ISLANDS. 163 



Group SOLITARY WASPS. 



Earn. EUMEJNTIDiE, Westw. 



Gen. EuMENES, Latr. 



1. Euraenes arcuata, Fabr. Syst. Piez. 287. H. 



Hab. Key Island; coast of New Guinea (Triton Bay); Australia. 



Gen. Pachymenes, Sauss. 



1. Pachymenes viridis. p. Isete viridis ; facie pube argentato-alba 

 tecta ; alis hyalinis. 



Female. Length 8 lines. Bright green; the head, thorax, and basal 

 segment of the abdomen rugose, the rest of the abdomen finely and 

 very closely punctured ; the clypeus thinly covered with a fine silvery- 

 white pubescence, its apex produced and truncate. Thorax : the 

 metathorax rounded behind, a deep longitudinal impressed line in the 

 middle, and with fine silvery down at the sides and behind ; the wings 

 subhyaline, with a fuscous stain along the anterior margin of the 

 superior pair; the legs rufo-piceous ; the coxse, femora, and tibiae 

 more or less tinged with green. 



Hab. Aru. 



Gen. Ehtnchium, Spin. 



1. Rhynchium mirabile, Sauss. Mon. Guepes Sol. 106. 6, t. 14. f. 5^ . 

 Hab. Aru ; Tasmania. 



The Male of this fine species closely resembles the female ; it is 

 black, with a transverse spot above the insertion of the antennae, an 

 abbreviated narrow line behind the eyes, another on the lower margin 

 of their emargination ; the scape in front and the clypeus yellow, the 

 latter notched at its apex ; a minute yellow spot at the base of the 

 mandibles ; the antennae, tibiae, apex of the femora, and the tarsi ferru- 

 ginous ; the basal joint of the intermediate and posterior tarsi dusky ; 

 the intermediate femora deeply excavated or hollowed beneath ; the 

 prothorax yellow above ; the metathorax truncate, transversely striated 

 with several minute teeth on the lateral margins; the wings hyaline, 

 tinted with yellow, their apical margins slightly clouded; the apical 

 margins of all the segments of the abdomen bordered with yellow, that 

 on the first segment narrowest. The only particulars in which the 

 female apparently differs from Saussure's description, is that the second 

 fascia on the abdomen is widest at the sides, and there are three little 

 teeth on each side of the margins of the metathorax. 



The Female is also in the Paris Museum. 



2. Rhynchium superbum, Sauss. Mon. Guepes Sol. p. 113. 18. 

 Hab. Aru; New Holland. 



