Mr, R. E. Turner on Fossorial Hymenoptera. 293 



to the length o£ the tu-o basal joints of the flagellum in the 

 female and by a distance equal to twice the length of tlie 

 second joint in the male. Pygidial area of the female 

 strongly punctured, long and narrow, pointed at the apex. 

 The median segment is opaque and coriaceous. 



Hah. Willowmore, Cape Province {Dr. Brauns). 



This is a true Tachysphex of rather slender build, the ante- 

 rior femora of the male being emarginate, though not as 

 strongly as in some species, and the tarsal comb of the female 

 very long. The dark fuscous wings distinguish it from other 

 black South- African Tachysphex. 



Tachysphex marshalli^ sp. n. 



2 . Nigra ; mandibulis basi, clypeo, flagello articulis tribus basalibus, 

 tegulis, segmento abdominali sexto, femoribus, tibiis tarsisqiie 

 rufo-testaceis ; alis fusco-violaceis, venis nigris ; fronte, clypeoque 

 basi aureo-pubescentibus. 



(S . Feminae similis ; flagello nigro ; segmento dorsali sexto nigro, 

 septimo rufo-testaceo. 



Long., $ 15, 6 11 mm. 



? . Clypeus broadly subtruncate at the apex, with two 

 minute teetii at the apical angles, shining and sparsely punc- 

 tured. Eyes separated on the vertex by a distance not quite 

 equal to the length of the second joint of the flagellum. 

 Thorax very finely and closely punctured ; median segment 

 a little longer tlian tlie mesonotum, finely longitudinally 

 rugulosCj with short stiise at the extreme base; the surface 

 o£ the apical truncation strongly transversely striated, with a 

 deep median sulcus. Abdomen microscopically punctured ; 

 the pygidial area lanceolate, pointed at the apex, with small 

 scattered punctures. Radial cell rounded at the apex ; second 

 abscissa of the radius longer than the third ; the space be- 

 tween the recurrent nervines on the cubitus equal to the third 

 abscissa of the radius. Tarsal comb long ; eight spines on 

 the fore metatarsus. 



(J . Eyes separated on the vertex by a distance equal to the 

 combined length of the two basal joints of the flagellum ; 

 dorsal surface of the median segment coriaceous ; anterior 

 femora emarginate at the base ; tarsal comb much shorter 

 than in the female ; seventh teigite subtruncate at the apex ; 

 eighth sternite widely emarginate, the angles forming 

 spines. 



Hah. Salisbury, Mashonaland {G. A. K. Marshall), April. 



A variety with the apical segment in both sexes black, and 



