610 MR. R. E. TURNER OK 



37. PiSON SERARATUS Sm. 



Pison sejKiratus Sm. Trans. Ent. Soc. London, p. 294 (1869), c? . 



Very near marginatus, but may be distinguished by the sparser 

 punctures of the median segment and the absence of sti-i?e, and 

 by the somewhat longer spine of the male clypeus. The colour 

 of the tarsi is a little more ferruginous. I have not seen the 

 female, but it is not improbable that when more material is 

 available it will prove to be merely a western form of wza?-- 

 ginatios. 



Hah. Champion Bay, W.A. {^Dti, Boulay). 



38. Pison tibialis Sm. 



Pison tibialis Sm. Trans, Ent. Soc. London, p. 292 (1869), 6 . 



The male has the clypeus produced into a spine at the apex; 

 the antennse stout and rather short, the second joint of the 

 flagellum nearly equal to the combined length of the first and 

 third ; the posterior ocelli nearer to each other than to the eyes, 

 which are nearly half as far again from each other on the 

 clypeus as on the vertex. The median segment is short and 

 broad, and the insect is of robust build in proportion to the 

 length. The female has the clypeus rounded, somewhat bluntly 

 produced in the middle of the apical margin ; the second joint 

 of the flagellum a little shorter in proportion than in the male ; 

 the posterior ocelli as near to the eyes as to each other, and the 

 eyes fully half as far again from each other on the clypeus as on 

 the vertex. 



Rab. Western Australia (Dt(. Boulay)-^ Kalamunda, W.A. 

 {Turner), February to April ; Brisbane, Q, [Hacker), December. 



39. Pison fraterculus, sp. n. 



$ , Nigra ; tegulis segmentisque abdominalibus fascia lata 

 apicali brunneis ; femoribus apice, tibiis tarsisque ferrugineis ; 

 segmentis dorsalibus fascia apicali pallide fulvo-pilosa ; alls sor- 

 dide hyalinis, venis fusco-fei-rugineis. 



S . Feminse similis. 

 Long,, 5 10 mm., S 9'5 mm. 



$ . Clypeus microscopically punctured, opaque, clothed with 

 whitish pubescence, bluntly produced and rounded in the middle 

 of the apical margin. Head and thorax minutely punctured ; 

 the front clothed with whitish pubescence as high as the emar- 

 gination of the eyes, without a fi'ontal sulcus ; second joint of 

 the flagellum a little longer than the third, but shorter than the 

 first and third combined. Posterior ocelli a little nearer to the 

 eyes than to each other, separated from the eyes by a distance 

 considerably less than their own diameter ; the eyes more than 

 half as far again from each other on the clypeus as on the 

 vertex. Median segment finely and closely punctured, the 

 median sulcus and carina distinct, but not very strong ; the 



