FOSSORIAL WASPS. 615 



49. PiSON EXULTANS, sp. n. 



(S . Niger ; mandibulis, antennis apice inf uscatis, tegulis, 

 abdomine segmento primo utrinque nigro-maculatOj segmento 

 septimo, femoribus apice, tibiis tarsisque ferrugineis ; segmentis 

 3-6 apice late brunneo-fasciatis ; alis sordide hyalinis, venis 

 nigris. 



Long. 8 mm. 



c? . Clypeus short and broad, the apical margin subtruncate, 

 produced into a point in the middle ; antennpe ra,ther stout, 

 distinctly thickened towards the apex, second joint of the 

 flagellum a little longer than the third, less than twice as long 

 as the first. Posterior ocelli a little further from each other than 

 from the eyes, sepai^ated from the eyes by a distance slightly 

 exceeding their own diameter ; eyes about half as far again from 

 each other on the clypeus as on the vertex ; the frontal sulcus 

 very shallow ; clypeus and front as far as the emargination of 

 the eyes clothed with whitish pubescence. Head and thorax 

 opaque, microscopically punctured ; pronotum clothed with very 

 pale golden pubescence. Median segment rather long, very 

 closely and minutely punctured, with a row of large punctures at 

 the base ; the median sulcus well marked but not deep, the 

 median carina very delicate, with a row of distinct punctiues on 

 each side of it in the sulcus ; the posterior slope closely and 

 finely punctured, with a strong median sulcus. First abdominal 

 segment elongate, subpetiolate, longer than the second, widened 

 to the apex, with an apical band of rather sparse whitish pu- 

 bescence, the second segment without an apical chitinous or 

 pubescent band ; segments 3-6 with broad pale brown chitinous 

 bands clothed with very pale fulvous pubescence ; seventh dorsal 

 segment subti-iangular, bluntly pointed at the apex ; the whole 

 abdomen closely microscopically punctured, more strongly and 

 sparsely on the ventral than on the dorsal surface. First recur- 

 rent nervure received just before the apex of the first cubital 

 cell, second interstitial with the second transverse cubital nervure ; 

 second cubital cell small, second abscissa of the i-adius as long 

 as the petiole of the second cubital cell ; transverse median 

 nervure received before the basal nervure. 



JIab. Victoria (French). 



Easily distinguished from the somewhat similarly coloured 

 species of the auratus group by the elongate first abdominal 

 segment and the triangular seventh segment. 



50. PiSON BASALIS Sm. 



Pison basalts Sm. Trans. Ent. Soc. London, p. 292 (1869), $ . 



This species belongs to the am-atus group, but may be dis- 

 tinguished by the ferruginous colour of the second dorsal 

 segment. The male has the seventh dorsal segment truncate at 

 the apex, as in aureosericeu-m. 



Hob. Mackay, Q. (Turner), November. 



