114 



undulating ; underside mostly pale-yellow, sides rounded, hind- 

 margin straight. Elytra lobiform. Legs thick, pale yellowish 

 piceous. Supra-anal lamina bidentate. 



Length of body (female)... ... ... 23 mm. 



Habitat. — AYest Australia." 



" In vol. II. of Capt. Ph. P. King's Survey of the Coasts of 

 Australia, 1818-1822, page 454, a species is described as Blatta 

 australis, McLeay, which may belong to this genus, but the des- 

 cription is wholly inadequate to fix family or genus, and the 

 species will have to remain undeterminate." 



II. Femora spineless or rarely the fore femora with a few 

 spines. 



A. Claws with arolia (except females of Heterogamidse). 



Chorisoneurid^ {Br., Syst., 251). 



" Head large, free, convex ; eyes remote. Pronotum rounded 

 or quadrate. Elytra quite explicate, acuminate ; veins distinct, 

 radial vein branching pinnately. Wings eitlier with their 

 anterior part acuminate, or the apical area folding and reflexed ; 

 anal area with radiating veins, fanlike. Femora spined at apex 

 only. Abdominal segment with the angles straight or rounded, 

 never produced. Supra-anal lamina of male rounded ; of female 

 similar or emarginate. Subgenital lamina of male rounded ; 

 styles provided." 



There are several genera, mostly extra- Australian, with only 

 a few species in each. They are mostly of very moderate size, 

 and distinguished by the pinnately-branched radial vein of the 

 elytra, and the very large triangular area of the wings, or in 

 one genus, by the wings foldings traversely in the middle. Only 

 two genera appear to occur in Australia. 



Chorisoneura, Brunner (System, 255, fig. 26). 



" Elytra with the radial and ulnar veins separated. Wings 

 perfect, apical area membranous. Femora unarmed, pilose. 

 Supra-anal area of male scarcely produced ; of female much pro- 

 duced, emarginate. Last ventral segment of female much con- 

 tracted in the middle. Cerci long, slender, filiform in both sexes. 



The five species described by Brunner are from Brazil (4), and 

 Mexico (1). The Australian species may possibly justify a new 

 genus for their reception, but the material available is too scanty 

 for a complete diagnosis. 



Chorisoneura hygrophoroides, Walker. 

 Blatta, Brit. Mus. Cat., 96. 



" Black, fusiform, depressed, ferruginous beneath. Head 

 tawny in front, labrum and vertex testaceous. Pronotum 



