85 



Length of body . . . 

 Leno'th of pronotum 

 Width of pronotum 

 Width of mesonotum 

 Width of abdomen 



Female. 

 32 mm. 



8 " 

 13 " 



16 " 



17 " 



Molineux, May, 



Habitat. — Gilbert River, S. Australia (L. 

 1887). S.A. Museum. 



This species resembles the preceding in stature and colour, but 

 is much smoother, the hindangles of the abdominal segments 

 much less produced, and the lamina of quite a different form. 



Platyzosteria {Peripl.) atrata, Erichson (Wiegm. Arch., VIII., 

 247 ; Br., Syst., 219). 



" Black, shining. Antennae, margin of pronotum, tibi?e at the 

 apex and the tarsi red, cox^e posteriorly with a yellow border. 



Male. Female. 



Length of body ... ... 17 mm. 23 mm. 



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



Width of pronotum ... 9 " 9-5 " 



Habitat. — New South Wales ; Tasmania." 



Platyzosteria {Periplaneta) aterrima, Erichs. (ibid). 

 " Deep black, shining, much depressed. Antennae ferruginous. 

 Supra-anal lamina of male with hindmargin straight. ' Resembles 

 the preceding species, but differs in dimension ' {Briimier). 



.Male. 

 Length of body ... .. ... 12-5 mm. 



Length of pronotum ... ... ... 4 " 



Width of pronotum ... ... ... 6 " 



Habitat. — Tasmania. " 



Platyzosteria PU>fCTATA, Brii'uner (Syst., 211). 



" Small, slender, deep black. Body wholly covered with im- 

 pressed distant spots. Abdomen with the last segments and the 

 lamina scabrous. 



Male. 

 Length of body ... ... ... 12-2 mm. 



Length of pronotum ... ... ... 3 " 



Width of pronotum 4-8 " 



Habitat. — Eyre's Sandpatch, near Eucla, Western Australia 

 {Mrs. Graham) ; S. A. Museum. New South Wales {Brunner). 



The single male from the former locality, which I refer to 

 this species, has lost the antennjie, but agrees well in dimensions, 

 &c., with the description. It is, however, less dotted, the 



