326 Mr. R. E. Turner on Fossorial Hymenoptera. 



? . Cljpeu3 very widely arcuately deflexed towards tlie 

 apex, the deflexed portion sraootli and shining, the apical 

 margin subtruncate. Eyes separated on the vertex by a 

 distance equal to about four times the length of the second 

 joint of the flagelluni ; head very distinctly but not very 

 closely punctured ; a smooth convex area between the ante- 

 rior ocellus and the base of the antennse. Thorax rather 

 more strongly punctured than tlie head, the individual punc- 

 tures large and clearly separated. Median segment scarcely 

 more than hal£ as long as the niesDnotnm ; the d n-sal surface 

 margined by carinre at the sides and apex, irregularly and 

 coarsely striate-reticulate ; the sides of the segment longitu- 

 dinally striated, the posterior slope rugose. Abdomen closely 

 and finely punctured ; pygidial area shining, sparsely punc- 

 tured, very narrowly truncate at the apex. Comb of the 

 fore tarsi long and slender. Radial cell short, very broadly 

 obliquely truncate at the apex ; second and third abscissas 

 of the radius subequal, each at least half as long again as the 

 fourth. 



S . Seventh dorsal segment broadly rounded at the apex ; 

 eighth ventral segment emarginate, testaceous, tlie apical 

 angles produced into short spines. Eyes separated on the 

 vertex by a distance not exceeding half the length of the 

 second joint of the flagellura. 



Hdh. N.E. Rhodesia, Mid Luangwa Valley, about 

 2000 ft. [S. A. Neave), July and August; Nyasaland, be- 

 tween Ft. Jameson and Dowa, 4000 ft. [S. A. ^eam), 

 October. 



The sexual divergence in the distance between the eyes 

 on the vertex is greater than in any Mediterranean species 

 of the genus. 



Subfamily Trytoxyloni:!^m. 



Pison papuaninn, Schulz. 



P'lson paimamnn, Scliuiz, Berlin. Ent. Zeit. xiix. p. 217 (19^)4), 



Pison moroius, Sm. Jouru. Linn. Soc, Zool. viii. p. 85 (186-i). 2 {^^^ 



Sm. 1856). 

 Pison constrictum, Turn. Ann. & Mag. Xat. Hist. (8) ix. p, 201 (19 J 2), 



Pison constriction, Turn. Proc. Zool. Soc. London, p. 627 (1916). 



I had overlooked the name papuanum in my recent paper 

 on Pison. 



