Mr. E. E. Turner on Fossorial Hymenoptera. 303 



the combined length of the two basal joints of the flagellum ; 

 the sulcus from the posterior ocelli shallow and not quite 

 reaching the occiput. Thorax minutely and very closely 

 punctured, thinly clothed with greyish pubescence ; median 

 segment more opaque than the thorax, the pubescence denser 

 than on the thorax, without a median sulcus on the dorsal 

 surface^ the segment about half as long again as the scutellum. 

 Abdomen fairly stout ; pygidial area very broadly rounded 

 at the apex, almost truncate, the sides not very strongly con- 

 vergent. Basal joint of the fore tarsus with six fairly stout 

 spines on the outer margin. Second abscissa of the radius 

 shorter than the third ; tirst recurrent nervure almost or 

 quite as near to the first transverse cubital as to the second 

 recurrent nervure. 



IJab. Hermannsburg, Central Australia (//. J. HilUer) ; 

 Killalpanima, S.A. {H. J. IlilUer). 



This is very near T.fatalis, but has the pygidial area much 

 broader at the apex, the sides less convergent; six spines on 

 the basal joint of the fore tarsus as compared with five in 

 fatalis ; there is also a ditFerence in the form of the clypeus. 



8. TacJiytes fatalis^ sp. n. 



5 . Nigra, argenteo-pilosa ; mandibulis apice, tegulis, unguiculisque 

 tarsalibus brunneis ; segmentis dorsalibus 1-4 fascia apicali 

 argenteo-pilosa ; area pygidiali aureo-pilosa ; alls hyalinis, venis 

 fusco-ferrugineis. 



Long. 13 mm. 



? . Clypeus very broadly rounded at the apex, the apical 

 margin, transversely depressed and bare, the base of the 

 clypeus and the front clothed with silver pubescence ; second 

 joint of the flagellum slightly longer than the third ; eyes 

 separated on the vertex by a distance equal to the length of 

 the two basal joints of the flagellum. Mesonotum minutely 

 and closely punctured ; median segment scarcely as long as 

 the scutellum and postscutellum combined, without a median 

 sulcus on the dorsal surface. Abdomen subopaque ; the 

 apical bands of silver pubescence broader at the sides than in 

 the middle j pygidial area clothed with golden pubescence, 

 elongate-triangular, narrowly rounded at the apex. Basal 

 joint of the fore tarsus with five spines on the outer margin. 

 (Second abscissa of the radius scarcely as long as the third ; 

 first recurrent nervure nearer to the second recurrent than to 

 the first transverse cubital nervure. 



Hah. Toowoomba, Q. 



This is nearest to disperaus, from which it may be distin- 

 guished by the golden pubescence of the pygidial area, which 



