612 MR. R. E. TURNER OX 



41. PiSON DECiriENS Sill. 



Pison decipiens Sm. Trans. Enfc. Soc. London, p. 295 (1869), S • 

 More nearly allied to dimidiatum than to any other species, 

 but differs in the colour of the abdomen, the somewhat longer 

 median segment, and in the whiter pubescence of the head a,nd 

 thorax. The clypeus is also less deeply sinuate on each side of 

 the apical spine. 



Hah. Champion Bay, W.A. {Du Boiday)^ 



42. Pison inoonspicuum, sp. n, 



S . Niger ; mandibulis, tegulis pedibusque, coxis exceptis, 



ferrugineis ; trochanteribus anticis femoribusque anticis basi 



nigricantibus ; seginentis dorsalibus apice anguste fusco-brunneis, 



fascia apicali sparse albido-pubescente ; alls hyalinis, venis f uscis. 



Long. 5-5 mm. 



(^ . Clypeus produced into a long spine at the apex, deeply 

 sinuate on each side of the spine, covered with silver pubescence, 

 which extends on the front as high as the emargination of the 

 eyes. Antennse rather short and stout, the second joint of the 

 flagellum a little longer than the third. Ocelli in an equilateral 

 triangle, the posterior pair as far from the eyes as from each 

 other, sejDarated from the eyes by a distance equal to at least 

 twice their own diameter ; the eyes no further apart on the 

 clypeus than on the vertex. Head very much broader than the 

 thorax, very minutely punctured, the frontal sulcus almost obso- 

 lete, only visible just below the anterior ocellus; thorax a little 

 more distinctly punctured than the head. Median segment 

 finely granulate, with a few indistinct oblique strias at the base ; 

 median sulcus very shallow, the median carina distinct. Abdo- 

 men microscopically punctured, more distinctly punctured on the 

 ventral surface ; second ventral segment finely and -evenly punc- 

 tured ; seventh dorsal segment dull ferruginous, broadly truncate 

 at the apex. Recurrent nervures interstitial with the transverse 

 cubital nervures ; second abscissa of the radius shoi'ter than the 

 petiole of the second cubital cell ; transv^erse median nervure 

 interstitial with the basal nervure. 



JIab. Mundaring Weir, W.A. (Turner), March 18, 1914, 



The anterior margin of the clypeus is shaped as in dimidiatus, 

 to which species and decipiens the relationship is close. But the 

 eyes are much closer together on the clypeus than in either of 

 those species, and the colour of the abdomen is diflerent, the 

 apical chitinous fasciae being much darker than in decijnens^ also 

 the antennae are entirely black. 



43. Pison aurifex Sm, 



Pison aurifex Sm. Trans. Ent. Soc, London, p. 293 (1869), $ cj", 



I have seen no recent specimens of this beautiful sj^ecies. It 



is of much more slender build than vestitiis or aureosericevmi, the 



shape of the first abdominal segment being much more elongate. 



