Mr. R. E. Tunier on Fossorial Hymenoptera. 103 



species except /renc/ii and macrocephalus^ and the hind tibiye 

 ure much less swollen than is usual in the ffenus. 



Subfamily Trtpoxtlonin^. 

 Pison deperditum, sp. n. 



2 • Nigra ; mandibulis, palpis, antennis, abdomine pedibusque 

 riifo-ferrugineis ; tegulis testaceis ; aUs hyalinis, venis fuscis ; 

 segmetito mediauo crasse riigoso, sulco mediali lato, transverse 

 striate. 



Long. 7 mm. 



? . Clypeus broadly rounded at the apex, clotbed with 

 wiiitish pubescence, vvbicli extends on to tbe tVonf. Second 

 joint of" tbe flageUuni about equal to tbe tbird, nearly twice 

 ;is long as tbe first. Eyes separated at tbe base of tiie clypeus 

 by a distance equal to nearly twice tbe leiigtb of tbe scape, 

 and by about tbe same distance on the vertex ; posterior 

 ocelli a little further from each otber than from tbe eyes, 

 separated from eacb otber by a distance equal to tbe diameter 

 of one of tbem, witb a sballowly impressed transverse line 

 bebind tiieni. Front witb a low carina from tbe base of tbe 

 antennre reaching halfway to tbe anterior ocellus. Pronotum 

 transverse, with a narrow depression along the hind margin; 

 tliorax smootb, opaque. Median segment very coarsely 

 rugose-reticulate, with short oblique strife at tbe base, and a 

 very wide transversely striated longitudinal sulcus, tbe poste- 

 rior slope irregulaily transversely striated. Abdomen micro- 

 scopically punctured, the segments broadly but very sballowly 

 dej)ressed on tbe apical margin. First recurrent nervure 

 received just before the apex of tbe first cubital cell, second 

 received close to tbe middle of the second cubital cell ; third 

 cubital cell on the radius very short, shorter tlian tbe petiole 

 of tbe second cubital cell. 



JIab. Port Darwin, Nortliern Territory {G. F. Hill). 



Tliis is very closely allied to P. rujicomis, Sm., from 

 wbich, however, it is easily distinguished by the very different 

 and much coarser sculpture of the median segment. The 

 neuration in both species is that of the section Pisonitus^ 

 Shuck. 



Pison multistrigatum, sp. n. 



$.. Nigra ; palpis testaceis ; calcaribus unguiculisque ferrugineis ; 

 alis hyalinis, apice levifcer infuraatis, venis fuscis ; segmeuto 

 mediano fortiter longitudinaliter striate. 

 Long. 9 mm. 



