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



This may be merely a local variety of the preceding 

 species and I only regard it provisionally as distinct. 



21. P. rufipes, sp. n. 



Piceous, nitid. A few minute punctures on the thoracic tergites, 

 distal abdominal tergites minutely scabrous, especially in the $ . 

 Pro- and meso-notum laterally bordered with rufo-castaneous. Head 

 piceous, antennae rufo-castaneous. Tegminal rudiments semi- 

 articulated. Lateral margins of 7th abdominal tergite not serrate. 

 Supra-anal lamina, {^) trigonal, apex truncate, scarcely emarginate, 

 lateral margins minutely serrate. Cerci exceeding the supra-anal 

 lamina in both sexes. Sub-genital lamina {^) subquadrate, a spine 

 at the base of each genital style equal to half the length of the 

 style. Coxae not bordered with testaceous, piceous, femora, tibiae 

 and tarsi rufous. Posterior metatarsi rather longer than usual in this 

 genus and armed beneath with a few spines. 



Length 11-12"5 mm. ; pronotum 4 mm. x 6 mm. 



Western Australia (Oxford Mus., types ^ and $). 



22. P. hiloba, Sauss. 



Polyzosteria hiloha, Saussure, Mem., Soc. Sci. Phys. 



Nat. Geneve, xx,p. 258, PI. Ill, f. 20 (1869). 

 Known to me from the description only. 

 Amboina (Geneva Mus., type). 



23. P. curiom, Shelf. 



Platyzosteria cnriosa, Shelford, [in] Fauna Slid west 



Austral., ii, Lief. 9, Blattidae, p. 135, PI. XIII, ligs. 



11, 12 (1909). 



A very remarkable species. A specimen in the Oxford 



Museum I refer with some doubt to this species, since 



the legs are rufo-castaneous in colour and the cerci are 



shorter than the supra-anal lamina. 



Western Australia, Northam (Michaelsen and Hart- 

 meijer), (Hamburg Mus., type) ; " New Holland" (Oxford 

 Mus.). 



24. P. bicolor, Kirby. 



Melanozosteria bicolor, Kirby, Ann. Mag. Nat. Hist. (7) 

 xii, p. 373 (1903). 

 A well-marked species. 



Torres Straits, Gornwallis Island (British Mus., type ; 

 Oxford Mus., co-type). 



