7G ]\Ir. R, E. Turner on Fossorial IJymenoptfra. 



long. Fore tarsi not ciliated ; intermediate tibiae with only 

 one distinct apical spine ; hind tibiae serrate. Neuration as 

 in spryi, but the second abscissa o£ the radius is a little, 

 longer, and the branch from the first transverse cubital 

 nervure is only faintly indicated. 



Hub. Yallingup, S.W. Australia ; January. 



One male only taken. 



This is another species of the cUiatus group. 



Arpoctus spinicornis, sp. n. 



J . Niger ; clypeo, scapo, flagello articulo prirao, pronoto linea 

 transversa, callis huineralibiis, tegulis, segmentis dorsalibus primo 

 secundoque, secundo macula magna nigra, pedibusque aurantiacis ; 

 flagello articulis 2-11. diraidio apicali subtus albis ; alis sub- 

 hyalinis, venis nigris. 



Long. 10 mm. 



(^ . Eyes convergent towards the clypeus, separated at 

 the base of the antennae by a distance greater than the 

 length of the scape ; second joint of the flagellum distinctly 

 longer than the third, apical joints strongly curved, a little 

 longer than the penultimate, the tenth and eleventh joints 

 strongly produced at the apex beneath into blunt tubercles, 

 the four preceding joints similarly but much less strongly 

 produced ; posterior ocelli nearly twice as far from eacii 

 other as from the eyes. Head and thorax finely and rather 

 sparsely punctured ; the transverse groove at the base of 

 the scutellum distinct and foveolate, scutellum and post- 

 scutellum strongly longitudinally striated ; basal area of 

 median segment strongly obliquely striated, the remainder 

 of the median segment coarsely rugose ; mesopleurse finely 

 obliquely striated on the lower portion, more strongly hori- 

 zontally striated on the upper portion, the vertical carina 

 and sternal horizontal carina distinct as in ciliatus. First 

 abdominal segment much narrowed to the base, as long as 

 the second segment, less than half as wide at the apex as the 

 second segment ; abdomen sparsely puncluied, ventral seg- 

 ments without long ciliae, seventh dorsal segment rounded. 

 Neuration as in sjjryi, but the cubitus of the hind wing is 

 separated from the transverse median nervure by a distance 

 equal to twice the length of that nervure. Fore tarsi not 

 ciliated ; only one spine at the apex of the intermediate 

 tibise. 



Hub. Beverley, S.W.Australia (Dn Boulay). 



Type from South Australian Museum. 



The species belongs to the ciliatus group ; but, as in some 



