Saiojlies from the Australian Region. 435 



Subfamilies of Argidse. 



Anal vein complete and separate for its entire length ; 

 first and secund anal c^ells separated by an oblique 

 iuteraual vein ; anella and recurrentella wanting. Zenuryincc. 



Anal vein either partly- or entirely wanting ; first anal 

 cell wanting or small and separated from the 

 second by the submedian vein; anella and re- 

 currentella present 1, 



1. Intercosta present Ai-r/incs. 



Intercosta wanting Sterictip/torhice. 



The Aigids, largely because of their threc-joiiited aii- 

 teiiiise, have hnig been considered as a distinct group, but 

 most classifications have failed to show any relationship 

 between them and such groups as the Perreyiidfe, Lobocerida?, 

 or Pteiygophoridse. A study of these four families shows, 

 lu'Wever, that they have much in comrDoUj and it is nob 

 unlikely that they h!;d a common origin and are phylo- 

 genetically closely allied. The subfatniiy Zeuar^inpe adds 

 son.e evidence to this assumj)tion, because it has certain 

 characters which suggest an affinity with the Pericjiidse and 

 certain otheis which suggest Loboceridse. The venation in 

 the Zenarginse is different from all other sawHies. Tiie 

 anterior wing probably represents a generaliz(d Argid, 

 because, with the exception of the complete anal vein, it 

 presents nothing remaikable. The apex of the radial ceil 

 and the form Of the radial and cubital cells, es[)ecially at the 

 base, however, suggest Lohoceras. The hind wing is much 

 more specialized than the hind wing of the Argids, because 

 of the loss of anella and recurrentella, and is not unlike 

 P^rreyia. The shape and foveolation of the head is not 

 tjpical of the A rgids, but recalls more the head of some of 

 the Perreyiidfe. 



In MacGillivray's classification the genus Zenarge runs to 

 the subfamily Lophyrinoe, but it has but little in common 

 with this group, and dots not even resemble it clusely in 

 vetiation. 



Zenarge, gen. nov. 



Genotype. Zenarge tumeric Rohwer. 



Clyi)eus long, the dorsad-ventrad length nearly half as 

 great as the apical width, the anterior margin rounded 

 iateralh' and emarginate medianly, the dorsal margin com- 

 posed of three sections, the lateral sections half the lengtli of 

 ihe median section, the entire dorsal margin sharply defined ; 



