304 ^Ir. ]\. E. Turner on Fossorial Ilymenoptera. 



is also more distinctly rounded at the apex than in 

 dispersus ; also bj the shorter median segment and the form 

 of the clypeus. From (pstuans it is easily distinguished by 

 the much narrower pygidial area and the number of spines 

 on the basal joint of the fore tarsus. 



9. Tachytes dispersus, sp. n. 



2 . Xigra ; unguieulis tarsalibus tegulisque bruimeis ; segmentis 

 dorsalibus 1-4 fascia lata apicali argenteo-pilosa ; area pygidiali 

 argentco-pilosa ; alls h3'a]iuis, venis nigris. 



c? . Feminae similis. 

 Long., 2 13 mm., cJ 11 mm. 



? . Clypeus clothed with silver pubescence at the base, a 

 bare, somewhat deflexed triangular area at the apex, the 

 apical margin truncate. Second joint of the flagellum 

 slightly longer than the third, more than twice as long as the 

 first ; eyes separated on the vertex by a distance equal to the 

 length of the third joint of the fl;igellum. Front, pronotum, 

 mesopleurse, and the sides of the mesonotum and of the 

 median segment clothed with silver pubescence; mesonotum 

 distinctly depressed in the middle of the anterior margin, 

 minutely and closely punctured ; median segment more 

 opaque than the mesonotum, more than half as lung again as 

 the scutellum, with an obscure median sulcus from base to 

 apex, the sulcus becoming broad and deep on the posterior 

 slope. Abdomen subopaque ; the apical fascife of pubes- 

 cence broad, especially on tiie sides; pygidial area elongate- 

 triangular, almost pointed at the apex. Basal joint of the 

 fore tarsus with five spines on tlie outer margin. Second 

 abscissa of the radius a little longer than the third ; first 

 recurrent nervure a little nearer to the second recurrent than 

 to the first transverse cubital nervure. 



Bab. Baudin Island, N.W. Australia {J. J. Walker) ; 

 Townsville, Q. (Dodd) ; Mackay, Q. (Turner) ; Perth, W.A. 

 (Turner) ; Port Essington, N.T. (Gould). 



This seems to be the commonest Australian species of tlie 

 genus, and ranges over almost the whole continent. Tiie 

 silver pubescence of the pygidial area and the narrower and 

 more pointed shape of the same area distinguish it from 

 other Australian species. 



10. Tachytes sulcatus, sp. n. 



2 . Nigra ; tarsorura articulis duobus apicalibus fusco-ferrugineis ; 



