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



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

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

 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- 

 vmjer)). 



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



Polyzosteria alhomarginata, Brunner von Wattenwyl, 

 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 : — 



Piceou.s, 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 7th 

 abdominal tergite finely serrate. Supra-anal lamina triangulai', 

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

 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, Coolgardie (Hamburg Mus.), Kalgoorlie 

 (coll. Froggatt.) 



88. P. hrunnea, Tepp. 



Platyzosteria alhomarginata, var. hnmnea, 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 Siidwest 

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

 (1909). 



