86 



scabrous part more extended, dull black above and below, and 

 the mouth parts (trojohi) and legs deep chestnut-brown. 



Platyzosteria pseudatrata, spec. nov. 

 DeejD black, shining. Thoracic segments with distant im- 

 pressed dots. Hindangies of mesonotum slightly, of metanotum 

 considerably, produced, rounded ; of the abdominal segments, 

 especially the hindmost, acutely produced, hindmargins finely 

 tuberculate. Legs with the cox?e black, narrowly bordered with 

 yellow ; trochanters and femora chestnut-brown ; tibise and tarsi 

 black, the latter white below\ Supra-anal lamina of male sub- 

 quadrate, dentate, deeply and roundedly emarginate. Cerci 

 wholly black, slightly longer than the lamina. Ventral abdom- 

 inal segments shining deep-black. Subgenital lamina of male 

 with hindmargin straight, entire, black ; styles black. 



Male. 

 Leng-th of body ... ... ... ... 23 mm. 



Length of pronotum ... ... ... 6*5 " 



Width of pronotum ... ... ... 12 " 



Width of abdomen ... ... ... 14 " 



Habitai. — Central Australia (from the collection of the late 

 Fraser S. Crawford). S.A. Museum. 



The species ajDpears to resemble Pcriplaneta fci^tipes, Walker, 

 but differs in the distantly punctured thorax, kc, and from 

 P. atrata, Er., in the absence of the red colour of the legs, kc. 



Platyzosteria albomarginata, Br. (Syst. 212). 



" Black. Antennae blackish at the lower third, remainder fer- 

 ruginous. Thoracic segments with white margins. Legs and 

 sujDra-anal lamina reddish. 



Male, (larvte?) 

 Length of body ... ... ... 18 mm. 



Length of pronotum ... ... ... 5 " 



Width of pronotum ... ... ... 6-5 " 



Habitat. — Sydney, ISTew South Wales." 



There are one male and two female specimens, undoubtedly 

 adults, in the collection of the S.A. Museum, which I am inclined 

 to refer to this species, but the above description is too meagre 

 for sure identification ; a more detailed description is therefore 

 given below, and the varietal name brunnea adopted. If the 

 characters should be proved sufficient to separate the two, the 

 latter name might become the specific term 



P. albomarginata, Var. brunnea, var. nov. 

 Black, varied with deep brown in the disk. Antennae pale 

 ferruginous, basal part black. Pronotum with foremargin l^rown, 



