Species of Fossorial Hymenoptera from Africa. 745 



basali elevata nulla ; segmento mediano area basali longitudinaliter 

 striata. 



^ . Feminae similis ; segmento mediano area basali obscure 

 transverse striata, segmento ventrali sexto angulis apicalibus valide 

 dentato. 



Long. 9. 14 mm.; ^, 11 mm. 



9 . Clypeus broad, the middle lobe more than half as broad again 

 as long, the anterior margin almost transverse, very feebly quadri- 

 dentate, the distance between the base of the clypeus and the 

 antennae equal to about half the length of the clypeus ; inter- 

 antennal carina high and narrow, triangularly truncate at the apex ; 

 antennae rather stout, the second joint of the flagellum distinctly 

 longer than the third. Cheeks nearly as broad as the eyes ; 

 posterior ocelli more than half aa far again from the eyes as from 

 each other. Clypeus and front below the base of the antennae 

 sparsely punctured ; front above the antennae irregularly longi- 

 tudinally striated, vertex closely punctured. Pleurae coarsely 

 punctured striate ; thorax very sparsely punctured in the middle, 

 the punctures more or less confluent on the sides of the mesonotum. 

 Median segment strongly, but not closely, punctured, the triangular 

 area at the base coarsely longitudinally striated. Abdomen almost 

 smooth, the fifth segment shallowly and sparsely punctured, first 

 dorsal segment more than twice as broad as long, the segments not 

 strongly constricted ; pygidial area granulate, gradually narrowed 

 from the base, narrowly rounded at the apex, less than twice as 

 long as the basal breadth, with a fringe of short hairs on the sides. 

 First recurrent nervure received at two-thirds from the base of the 

 second cubital cell, second at one-quarter from the base of the third 

 cubital cell. 



(J. Head and thorax closely and rather deeply punctured, 

 sparsely on the clypeus and front below the base of the antennae ; 

 middle lobe of the clypeus longer than broad, with three indistinct 

 teeth at the apex. Apical joint of the flagellum slightly curved 

 and truncate at the apex. Basal area of the median segment 

 shining, with a median groove and very obscurely and transversely 

 striated. Abdomen sparsely punctured, the basal segment not quite 

 twice as broad as long ; sixth ventral segment with a broad tooth 

 on each side at the apical margin; pygidial area sparsely and 

 coarsely punctured, twice aa long as broad, the sides almost 

 parallel, truncate at the apex. First recurrent nervure received 

 close to the middle of the second cubital cell, second close to the base 

 of the third cubital cell. 



Hob. British East Africa, Yala River, S. edge of 



