FOSSORIAL WASPS. 609 



produced portion smooth and shining. Antenn?e not very stout, 

 the second joint of the flagellum distinctly, hut very sh'ghtly, 

 longer than the third, more than twice as long as the first. 

 Posterior ocelli as far from the eyes as from each other, separated 

 from each other by a distance less than the diameter^ of one 

 ocellus; eyes almost twice as far apart on the clypeus as on the 

 vertex. Head and thorax opaque, microscopically punctured. 

 Median segment finely and closely obliquely striated ; the median 

 sulcus very distinct, but not reaching the base, without a distinct 

 carina, the posterior slope transversely striated. Abdomen 

 covered with golden pubescence, on the dorsal segments forming 

 denser apical fasciae. Petiole of the second cubital cell shorter 

 than the second abscissa of the radius and no longer than the 

 height of the second cubital cell ; transverse median nervure 

 interstitial with the basal nervure. 



Hah. Kuranda, Q. {Turner), May. 



This is allied to aui'iventre, but is distinguished by the shape 

 of the clypeus, the lesser distance between the eyes on the 

 vertex and between the posterior ocelli, and by the sti'iation of 

 the whole dorsal sxirface of the median segment, the striation 

 in auriventre being confined to the extreme base and almost 

 obsolete. In both species the second ventral segment is very 

 finely, closely, and evenly punctured. 



35. PiSON SIMILLIMUS Sm. 



Pison simillimus Sm. Titans. Ent, Soc, London, p. 29*2 

 (1869), d. - 



This may be distinguished from marginatum and other allied 

 species by the very distinct oblique striation of the dorsal surface 

 of the median segment. The tibife and tarsi are ferruginous, 

 the apical margins of the dorsal segments brown. In the male 

 the posterior ocelli are a little nearer to each other than to the 

 eyes, but in the female the distances are about equal ; the male 

 has the clypeus produced into a spine, that of the female being 

 very broadl3' rounded. Tlie second abscissa of the radius is 

 as long as or longer than the petiole of the second cubital cell, and 

 the first recurrent nervure is received just before the apex of the 

 first cubital cell. 



Hab. Victoria {French), 



36. PiSON MARGINATUS Sm. 



Pison marginaius Sm. Cat. Hym. B. M. iv. p. 314 (1856), $, 

 This species has the median segment very closely and finely 

 punctured, the punctures intermingled with very delicate strife, 

 which are not visible in all lights. The margins of the abdominal 

 segments are rather broadly brown, with fascife of pale, dull, 

 fulvous pubescence. 



Hab. M^elbourne, Victoria {French) ; Mackay, Q, {Ticrner)^ 

 October, 



