Mr. H. E. Turner on Fossorial Ilymenoptera. Ill 



by sulci; from the apex of the triangle a longitudinal trans- 

 versely striated groove runs to the apex of the segment, and 

 is continued after a narrow interruption on the apical slope. 

 Abdomen finely punctured, somewhat pubescent, the three 

 basal segments shallowly depressed on the apical margin ; 

 second ventral segment microscopically punctured, more 

 finely than the third ; second to fourth ventral and third to 

 fifth dorsal segments very narrowly pale testaceous at the 

 a{)ex. Third cubital cell as long on the radius as the petiole 

 of the second cubital cell ; recurrent nervures received just 

 before the first and second transverse cubital nervures. 



Hub. Gold Coast, Tamale {D,\ C. E. S. Watson). 



This belongs to the group of P. .vanthojm-t, BruUd, but 

 may be distinguished by the less oblique striation of the 

 median segment, the colour of the pubescence on the front, 

 and the shape of tiie clypeus. 



PiSo)i carinatum, sp. n. 



5 . Nigra ; mandibulis iu medio fusco-ferrugineis ; calcaribus 



pallide testaceis ; alls hyalinis, margine apicali leviter infuscatis ; 



froute argenteo-sericeo, a.bdonune segmeutis dorsalibus 1-3 



margiue apicali albido pubesceutibus. 

 (S . Feniina3 similis ; tarsis rufescentibus ; segmeutis abdominalibus 



4-7 rufis ; segmento dorsali seplimo luto, detlexo, apice sub- 



truucato. 

 Long., 2 7, c5" 6 mm. 



? . Clypeus with a low longitudinal carina on the basal 

 half, broadly subtruncate at the apex. Head opaque, with a 

 delicate longitudinal sulcus on the front reaching to the 

 anterior ocellus. Eyes more than half as far again from eacii 

 other at the base of the clypeus as on the vertex ; posterior 

 ocelli a little nearer to each other than to the anterior ocellus, 

 further from each other than from the eyes ; second joint of 

 the flagellum a little shoiter tiian the third. Thorax closely 

 and minutely punctured, more strongly on the mesoplcurfe 

 than on the mesonotum ; median segment finely obliquely 

 striated, depressed longitudinally in the middle, with a 

 distinct longitudinal carina, the apical slope transversely 

 striated, the sides of the segment finely and closely punctured. 

 Abdomen on both surfaces closely and microscopically punc- 

 tured ; sixth dorsal segment broadly triangular, convex, 

 subcarinate iongiiudinally in the middle. The position of the 

 recurrent nervures and also the length of the third cubital 

 cell on the radius show much variation in this species. 



The male has the clypeus more produced in the middle 



