99 



coxse bordered white. Abdomen with lateral and hindmargins 

 of all segments narrowly yellow, segments two to six with a 

 narrow anterior band dotted black, and irregular borders yellow, 

 interrupted (at least in the middle) ; ventral segments bordered 

 narrowly white, last one concavely brownish-yellow behind ; 

 valvules of female black. Supra-anal lamina narrower behind, 

 angles rounded, emarginate, base narrowly black, remainder 

 yellow. Cerci slender, subconical, much shorter than the lamina. 



Female. 

 Length of body ... ... ... ... 23 mm. 



Length of pronotum ... ... ... 7 " 



Width of pronotum .. ... ... 10 " 



Width of abdomen ... ... ... 13 " 



Habitat. — South Australia (precise locality not recorded). S. A. 

 Museum. 



Knephasia, gen. nov. 



Etymology : — /inep/i«6^=dusky, referring to colour. 



Ulongate-oval to subfusiform, very convex, very rugose, with 

 minute raised tubercles. Pronotum subsemicircular, lateral 

 margins incrassated, angles acute, hindmargin quite straight. 

 Elytra or wings none. Legs short, rather stout, femora thickly 

 spined, tarsi very slender. Supra-anal lamina of male rounded, 

 very slightly emarginate, glabrous. Cerci lanceolate, ciliate, 

 slightly exceeding the lamina. Subgenital lamina of male broad, 

 transverse, slightly emarginate, ciliate ; of the female valvate. 

 Monotypic. 



In outhne the genus resembles Brunner's figure of Derocal- 

 ymmn dispar, but is even removed from the division to which 

 this belongs on account of its spinose femora. It is easily dis- 

 tinguished from all others by its j)eculiar dorsal texture, narrow, 

 elongate form, short abdomen, and the form of the supra-anal 

 lamina of the male. Both sexes being wingless, and the female 

 possessing valvules, removes the genus from the EpilainpridcB. 



The following synopsis represents roughly the relationships of 

 this and some other new genera to certain others of prior 

 date : — 



1. Femora spined. 



2. Abdomen of female with last ventral segment valve-like. 

 Wingless or elytra perfect, lobiform or absent. 



PERIPLAXETIDiE. 



3. Body very convex, elongate or fusiform. Wingless (re- 

 sembling E'pilam'pro). 



4. Body with impressed dots. Pseudolampra, gen. nov. 

 4.4. Body with raised tubercles. Knephasia, gen. nov. 



