Mr. R. E. Turner on Fossorial Hymenoptera. 201 



pubescence. Spur of tlie liiinl tibia shorter by oiie-tliirJ thau 

 the basal joint of tlie hind tarsus. Ridial cell lanceolate ; 

 first abscissa of the radius twice as long as the second ; 

 recurrent nervures interstitial with the first and second 

 transverse cubital nervures, the second recurrent nervure bent 

 outwards near the middle; the second cubital cell small. 



llah. Miniika River ; August 1910, 1 ? . 



Nearly allied to P. in'dipenyie, ISni,, but in the present 

 species the eyes are closer to each other on the vertex and 

 the median segment is smooth, whereas very tine stria3 are 

 visible in iridipenne. 



19. Pison constrictum, sp. n. 



cJ . Niger, dense punctatus, albo-pilosu3, alis subhyaliais, veiiis 

 nigrid ; clypeo apice dente acuto arraato, fronte rugulosa, seg- 

 mento mediano postice transverse striato, sulco mediano basali 

 iudistincto. 



Long. 11 mm. 



cJ . Clypeus more than twice as broad as the greatest 

 length, produced into an acute tooth on the middle of the 

 apical margin, covered with delicate silvery-white pubes- 

 cence. Eyes more than half as far again from each other on 

 the clypeus as on the vertex ; posterior ocelli very close 

 together, a little nearer to each other than to the eyes and 

 much nearer to each other than to the anterior ocellus, a 

 shallowly impressed transverse line behind the posterior 

 ocelli. Front rugulose, the emargination of the eyes opaque 

 and almost smooth, a less strongly rugulose convex space 

 divided by an indistinct longitudinal groove above the base 

 of the antennse ; second joint of the fiagellum longer than 

 the third, but shorter than the first and third combined ; 

 vertex, thorax, and median segment finely and closely punc- 

 tured, abdomen very finely punctured; a very shallow sulcus 

 almost obsolete at the apex from the base of the median 

 segment, the posterior truncation somewhat abrupt, the 

 surface of the truncation irregularly transversely striated 

 with a deep median depression from the base not quite 

 reaching the apex. Abdominal segments moderately con- 

 etricted at the base, the apical segment small and rugose, 

 pointed at the apex. Basal joint of the posterior tarsi 

 scarcely longer than the spine of the posterior tibiae. First 

 abscissa of the radius about twice as long as the second, the 

 second cubital cell very small, only occupying one-third of 

 the length of the first transverse cubital nervure ; fir^t 



