622 MR. R. E. TUR-NER ON 



72. PiSON ALLONYMUM Scliulz. 



Pison iridipennis Cam. Rec. Albany Mus. i. p. 261 (1905), S 

 (nee Smith, 1879). 



Pisum aUonymuon iScliulz, Spolia Hymen, p. 213 (1906), 



The head, thorax, and median segment are coarsely punctured, 

 the eyes very far apart on the vertex, nearly as far as on the 

 clypeus, the posterior ocelli fui-ther from the eyes than from each 

 other. I do not think that this can be rhodesianum Bisch., the 

 distance between the eyes being so much greater than in ater, 

 and the puncturation much coarser. 



PLab. Dunbrody (O^Neill) ; Willowmore [Dr. Brcmns) ; Mid 

 Luangwa River, N.E. Rhodesia {Neave), August ; Nawalia, 

 ISTiamadzi River, N.E. Rhodesia {Neave), August. 



r *73. Pison rhodesianum Bisch. 



Pison rhodesiamwi Bisch. Arch. f. Naturg. A. 3, p. 75 

 (1913),$. 



From the description this seems to be very near P. ater, with 

 which Bischoff compares it. I consider that it is certainly dis- 

 tinct from any of the African species described by Cameron. 



Hah. Buluwaj^o ; October. 



74. Pison transvaalensis Cam. 



Pison transvaalensis Cam. Ann. Transv. Mus. ii. p. 152 

 (1910), S- 



A specimen of this species, labelled "type" by Cameron, is in 

 the British Museum-. It is from the Cameron collection, and is 

 a female ; but Cameron was accustomed to label all specimens 

 before him '■ type," not only one. The species is very near denti- 

 ceps, and I am inclined to think that Cameron has mistaken the 

 sex of his type, and that de7iticeps is really the male of trans- 

 vaalensis, in which case the latter name would stand. But the 

 position of the first recurrent nervure is different. The posterior 

 ocelli in transvaalensis are very close to the eyes. 

 ■ Hah. Pretoria. 



75. Pison denticeps Cam, 



Pison denticeps Cam. Ann. Transv. Mus. ii. p. 153 (1910), J . 



This may be distinguished from xanthopiis by the finer stria- 

 tion of the median segment, the less constricted abdominal 

 segments, the apical ventral segment is produced into two points 

 as is usual in the genus, not into one only as in xanthopus; the 

 clj^peus also has a distinct spine at the apex, and the front 

 is more distinctly convex. This species is remarkable as showing 

 a transition in neuration from Pison to Pisonoides, the second 

 transverse cubital nervure being sometimes entirely absent, but 

 sometimes represented by a stump -, probably a « long series 

 would show the full transition. 



Hab. Transv^aal. 



