some new Asilidae /rom Western Australia. 521 



possible to do otlierwise tlian create a new genus for the 

 second S[)ecios — the germs Qnestopofjon. It appears as if 

 there is a subsection in the Dasypogoninte comprising a 

 number of closely related genera of whicli Xeosaropigoa 

 and Questopogon are two. It will be a point for future 

 investigation in work on this group *. 



Asilidae. 



Leptogastbinjb. 



Phellus piliferuSf ap, n. 

 (PI. XV. tig. 2 ; wing, text-fig. 2, A.) 



The genus Phellus was founded by Walker for one specie??, 

 and only one species — Phellus glauciis — lias been known up 

 to the present. This form is peculiarly West Australian, 

 and more especially coastal. It has been stated by Froggatt 

 to occur inland, and we can verify this statement, having 

 specimens from Ciinderdiii, 



As is well known, it is a very large and fine-looking fly, 

 measuring 45 mm. in length. The new species, which may 

 be named Phellits piliftrus, is equally large and even more 

 striking. There is one specimen only in our collection — a 

 male from Cape Riche (see map, text-fig. 1) on tlie extreme 

 «outh coast, a very different environment from the Swan 

 River district. There is, however, a female in the BritisJi 

 Museum Collection, and this has not been described. Fortu- 

 nately, therefore, the two sexes are known. 



Face. — Brownish yellow, the greater part being hidden by 

 a thick bushy moustache of many long golden-yellow hairs. 



//ipa(/ clothed behind with yellow hairs and also beneath. 



Antentire. — Third joint brown-red, the two basal Joints 

 black. The tiiird joint quite twice as long as ihe other two. 



Thorax. — Black, with delicate sparse black hairs on dorsal 

 surface. Literally the hairy covering is thicker, and stout 

 brown bristles are present. The bristles are rather like those 

 found in the same position on P. glaucus, but are more obvious 

 (perhaps owing to state of preservation). Posteriorly the 

 tliorax bears a covering of stout yeliownsh-white hairs. 

 Ventral surface with pale yellow hairs between leg-bases. 



Legs. — Superficially there is no great difference fiom 

 P. glancus in the colour and vestiture of the legs. They are 



* The autliors would like to thank Major Austin, of the British 

 Museum, for his assi-^tance, and to state that the lypoa of the new 

 species are now in the B.M. Collection. 



