Mr. R. Shelford's Studies of the Blatticlae. 283 



scarcely produced backwards in ^. Supra-anal lamina, {$) sub- ^ 

 quadrate, apex widely emarginate, lateral margins entire, ( 9 ) 

 cucullate, triangular, apex emarginate, lateral margins entire, 

 exceeded by the cerci. Sub-genital lamina ( $ ) with posterior 

 margin slightly produced. 



Total length {^) 14-8 mm., (?) 16 mm. ; pronotum 4-4 '8 mm. x 

 5-5 "8 mm. 



West Australia, various localities (British Mus., type ; 

 Oxford Mus. ; Hamburg Mus. {Michaelscn and Hart- 

 meyer)). 



37. P. albomarginata, Br. (PI. VIII, fig. 22.) 



Polyzosteria albomarginata, Brunner von Watteuwyl, 

 Nouv. Syst. Blatt., p. 212 (1865). 



Brunner's description is drawn up from a larval 

 specimen, the following is a description of the adult 

 male : — 



Piceous, nitid, impunctate. Antennae rufescent except at base. 

 Thoracic tergites faintly carinate, laterally bordered with flavo- 

 testaceous, the borders being outwardly margined rather broadly 

 with piceous. Tegminal rudiments absent. Lateral margin of Ttli 

 abdominal tergite finely serrate. Supra-anal lamina triangular, 

 apex incised, lateral margins serrate. Cerci equal in length to the 

 lamina. Sub -genital lamina quadrate, scabrous, styles stout. Legs 

 rufo-castaneous. 



Length 34 mm. ; pronotum 9 mm. x 13'8 mm. 



New South Wales, Sydney (Vienna Mus., type) ; 

 West Australia, Goolgardie (Hamburg Mus.), Kalgoorlie 

 (coll. Froggatt.) 



38. P. hrunnea, Tepp. 



Platyzosteria albomarginata, var. irunnea, Tepper, Tr. 

 R. Soc. S. Australia, xvii, p. 86 (1893). 



This appears to be quite distinct from the preceding, 

 but I have seen no examples. 



S. Australia, Gilbert River, Kangaroo Is. ; Central 

 Australia, Barrow range (Adelaide Mus,, types). 



39. P. variegata, Shelf. 



Platyzosteria variegata, Shelford, [m] Fauna Slidwest 

 Austral., ii, Lief. 9, Blattidae, p. 137, PI. XIII, fi-. 14 

 (1909). 



