292 REVI.<ION OP GEXKRA BELOXCiING TO DIPTERA BEACHYCERA OF AUSTRALIA, 



of the abdominal club, like those species belonging to the genus Brachyrrhopala 

 and, indeed, only some have the abdomen at all resembling a club. 



Genus Brachyrrhopala Macquart. 



Type, B. ruficornis Macquiirt. Tasmania. 



Characters. — The antennae are without the fourth joint. The anterior tibiae 

 contain an apical spur. The wings have the fourth posterior cell open. The 

 abdomen is conspicuously club-shaped, containing a restricted basal portion and 

 a compact apical portion rounded at the apex. The integuments of the abdomen 

 are hard and do not slirivel or collapse when dried, as tliey do in species of Caba.sa 

 which have a club-shaiieil abdomen. 



Notes. — The species hitherto known as Bracliyrrliopala nitidiis Macquart, 

 does not belong to this genus; it is allied to the genera Saropogoti. 



The species hitherto known as Brachyrrhopala limhipennis Macquart also 

 does not belong to this genus; it is nearer to the genus Eri/thropogon, but differs 

 considerably in the antennae and may represent a new genus. 



Genus Codula Macquart. (Text-fig. 8). 



Type, ('. limhipennis Macquart. New South Wales. 



Characters. — The antennae are without the fourth joint. Tlio anterior tibiae 

 are without a spur. The wings have the fourth posterior cell open. The abdo- 

 men is club-form. 



Subfamily ASILIXAE. 



Notes. — A paper by White was published in 1917 and in it the Australian 

 genei'a of the subfamily were given a better taxonomic treatment than that given 

 by Miss Ricardo. The one outstanding feature of White's paper was the elimin- 

 ation of various genera that do not occur in Austraba. There are, however, 

 characters taken to be of generic value that do not conform to all the species 

 within the various genera included in White's key. 



In the first key given below the genera are grouped into sections according 

 to what is taken to be their primary characters. One of these sections contains 

 three genera that appear to be closely related, although they diverge widely in 

 appearance. Remarks concerning them will be found under their respective 

 descriptions. 



The second key can he utilised for the purpose of placing any species into 

 its genus and will be found very easy to use. 



For convenience, the more obscure divisions are treated here as subgenera. 

 On this account the names Neoaratii^, Trichoitamu.'< and Bhabdotoitamun do not 

 appear in the keys, but a few remarks upon them will be found under the 

 genera to which they are respectively referred. 



Key to the genera of the Asilinae shoiring supposed affinities. 



1. Wings with three submarginal cells Prmnachvs 



Wings with two submarginal cells ■ • 2 



2. Female abdomen with the apical segment cylindrical and in no way different 



from the others • • 3 



Female abdomen with the apical segment black, shining, bare of tomentum 

 and more or less compressed Blcpharotes ; Pararaius ; Neoitamns 



3. Antennae with the arista bare Asilus 



Antennae with the arista pectinate Ommatius 



