300 i\rr. E. E. Turner on Fossorial Hymenoptera. 



9. Pygidial area almost pointed, densely 



clothed with silver pubescence T. dispersiis, Turn. 



Pygidial area very coarsely punctured, the 

 punctures confluent longitudinally, 

 sparsely clothed with fusco-ferruginous 

 setae T. sulcatus, Turn. 



1. Tachytes formosissimnf>^ Turn. 



Tachytes formosissimus, Turn. Proc. Zool. Soc. London, p. 482 (1908). 

 2- ■ " 



Hob. Mackay, Q. {Turner). 

 I have only seen the lype. 



2. Tachytes ruhellus, Turn. 

 Tachytes rubelhts, Turn. Proc. Zool. Soe. London, p. 482 (1908). ^. 



Hah. Port Darwin, N.T. ( Tunier) ; Adelaide, S. A. (ex 

 coll. Perkins). 



$ . The pygidial area is fairly broad, rounded at tlie apex, 

 clothed witli golden pubescence. liasal joint of the fore 

 tarsus with five spines on the outer margin. Second abscissa 

 of the radius equal to the third ; the two recurrent nervures 

 separated on the cubitus by a distance greater than that 

 between the first recurrent nervure and the first transverse 

 cubital nervure. 



The only female I have seen is from Adelaide ; the species 

 appears to be rare, though with a considerable range. 



3. Tachytes approximatus, Turn. 

 Tachytes appro.vimatus, Turn. Proc. Zool. Soc. London^ p. 483 (1908). 



Hah. Mackay and Cairns, Q, (Turner). 



A. Tachytes plutocraticns, Turn. 

 Tachytes plutocraticus,l!urn. Proc. Zool. Soc. London, p. 348(1910). § . 



Hab. Townsville, Q. {Dodd). 



Tiiis is the largest Australian species of the genus. 



5. Tachytes rehicois, sp. n. 



5 , Nigra ; tibiis, tarsis. femoribus apice, posticis fere totis, 

 tegulisque laete brunneo-testaceis ; segmentis dorsalibus fascia 

 lata, ventralibus angusta brunueo-ferruginea ; segmentis dor- 

 salibus, fascia lata apicali prtecipue, aureo-serieeis ; capita 



