91 



Platyzosteria trifasciata, sjyec. nov. 



Deep-brown or black, margin mostly paler, minutely scabrous 

 with rather large depressed dots over thoracic segments 

 Pronotum semicircular, hindmargins of all thoracic segments 

 broadly pale straw-coloured or yellow. Elytra none. Legs and 

 underside black, coxa? bordered yellow. Abdomen concolorous, 

 posterior angles more or less acutely produced, hindangies of 

 segment eight, and the cerci red. Supra-anal lamina of male 

 truncate, black, hindmargin densely ciliate, with tan-coloured 

 hairs, angles with a slender spine ; of female sub-semicircular, 

 margins dentate. Subgenital lamina of male subquadrate, 

 slightly exceeding the supra-anal, hindmargin concave, serrate, 

 angles spinose, styles slender, acute, as long as lamina, black ; 

 subgenital plate of female short, subtriangular margin entire. 



Male. Female. 



Length of body ... 20-22 mm. 21 -23 mm. 

 Length of pronotum 5-6 " 5-5- 6-5 " 



Width of pronotum 9-11 " 10 -12 



Rahitat. — Northern Territory of South Australia. 



The examples of this species were presented to the S. A. Museum 

 by Hon. Ur. S. J. Magarey, 1886, and consist of eight males and 

 seven females. All are remarkable for the uniformity of their 

 character. The three pale bands render the species easy of 

 recognition. 



Platyzosteria balteata, spec. nov. 



Small. Shiningly black. Face with minute yellow, ocelliform 

 spots. Antennae and palpi i eddish-brown. Pronotum with 

 small, distant, impressed spots, margins pale yellow. Meso- and 

 meta-notum similar, pale border of hindmargin abruptly ter- 

 minated by lobes of elytra, wider laterally, narrower in the 

 middle. Elytra lobiform, apex rounded, exterior margin pale. 

 Abdomen with hindangies of segments more or less acutely 

 produced, lateral margins very narrowly brown, hindmargin pale 

 yellow, bordered with brown anteriorly ; ventral segments and 

 coxye bordered white. Legs reddish-brown, tarsi whitish l^eneath. 

 Supra-anal lamina subconical, finely serrate and slightly emar- 

 ginate. Cerci black, apex red. 



Female. 

 Length of body ... ... ... 12 -15 mm. 



Length of pronotum ... ... 3*5 " 



Width of pronotum ... ... 6 " 



Hnhitiit. — Calling-ton, South Australia. S.A. Museum. 

 Three females were captured by me in January under decaying 

 vegetal:)le debris. The sjjecies appears to resemble Walker's P. 

 folyzona, but differs in being much smaller and having lobiform 



