250 ON THE MALE GENITALIA OF SOME ROBBER-FLIES BELONGING TO THE SUBFAMILY ASILINAE. [Diptera.] By G. H. Hardy. (With twelve Text-flgures.) A study of tliC male genital forceps of Australian Robberflies belonging to the subgenus Asilus has been undertaken for the purpose of establislung a satis-factory method of identifying the described species. A further species with extra-oidinarily developed male genitalia is described as new. This opportunity is taken to publish a figure of the male genitalia of Protna-chuti doddi Ricardo, which belongs to a genus containing several closely allied species. Genus P I! () M A c H r s Loew. Ql,g_ — This geuus is very scantily represented in the various collections in Australia, and the specimens available for study do not readily conform to the descriptions already published. There are six names representing sis supposedly distinct species and the only named specimen in the collections under revision is P. doddi Ricardo, which was identified by Miss Ricardo. Text-tig. 1. The male genitalia of Proiiiac/iKS doddi Ricanlo, seen dorsiiUy. (x 14).