256 



ON THE MALE GENITALIA OP SOME ROBBER-FLIES, 



Text-fig.5. The male genitalia of Asiliis pelago Walker, seen laterally, ^x li). 

 Text-fig.6. The male genitalia of Asilus malleolus Walker, seen laterally, (x 1-t). 

 Text-fig. 7. The male genitalia of Asilus inglofius Macleay, seen laterally, (x 14). 

 Text-fig. 8. The male genitalia of Asilus rufiventris Macquart, seen laterally, (x 14). 



Asilus planus, Walker, Ibid., vii., suppl. 3, 1855, pp. 730 and 741 ($). 

 Asilus sericeiventris, Macquart, MS. name. 



Synonymy. — The above synonymy is given on the authority of Miss Ricardo, 

 who accepts Sehiner's authority for the identification of Asilus inglorius Macleay. 



The species referred here is the only known form to which Macleay's descrip- 

 liiin can be applied. 



Description. — The upper forceps of the male genitalia are long, slender and 

 attenuated ai)ieally; the attenuated portion is deflected basally and then curves 

 back to the horizontal line at the apex. A hump at half the length on the dorsal 

 surface partly conceals the lamella. 



Ilab. — Queensland, New South Wales, Victoria, South Australia and Western 

 Australia. These States are represented liy specimens in the Australian and 

 Macleay Museums. 



Asii.is liUFivENTRis Macquart. (Text-fig. 8.) 



Asilus rufiventris, Jfacquart, Dipt. E.xot., !., (2), 1838, p. l-H; Walker. List Dipt. 



Brit. Mus., vii., suppl. 3, 1855, pp. 730 and 739; Ricardo. Ann. Mag. 



Nat. Hist.. (8). xi.. 1913. p. 442. 

 .Lsilus alligans, Walker, Iliid.. vii., suppl. 3, 1855, p)). 730, 734 riid 740. 



