Mr. R. Shelford's Skidies of the Blattidae. 277 



18. P. coxalis, Walk. 



Polyzosteria coxalis, Walker, Cat. Derm. Salt. Brit. 

 Mus. V. Suppl. Blatt., p. 35 (1871). 



(5 . Above rufo-castaneous, abdominal tergites with lateral piceous 

 blotches increasing in size distally. Below piceous with disc of 

 abdomen castaneous. Head rufo-castaneous. Thorax smooth, nitid ; 

 abdominal tergites somewhat scabrous. Tegminal rudiments semi- 

 articulated. Lateral angles of 8th tergite not s^jinously produced 

 but lobiform as in Gosmozosteria and yellow. Supra-anal lamina 

 quadrate, posteriorly widely emarginate, posterior angles slightly 

 produced, lateral mai'gins serrate. Cerci scarcely exceeding the 

 lamina. Sub-genital lamina quadrate, a minute spine at base of 

 genital styles. Coxae bordered with yellow, femora rufous, tibiae 

 castaneous. 



Length 20 mm. ; pronotum 6 mm. x 9 mm. 



Bombay (British Mus., type). 



19. F. Hglumis, Sauss. 



Polyzosteria higlumis, Saussure, Rev. Zool. (2) xvi, p. 



305 (1864). 

 Polyzosteria sitbaptera, Brunner von Wattenwyl, 

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

 A very variable species both in colour, which ranges 

 from piceous to castaneous, and in size. It can be 

 distinguished by the semi-articulated tegmina, scabrous 

 distal tergites and coxae margined with testaceous. 



New South Wales (Oxford Mus.), Sydney (Stockholm 

 Mus,); Victoria, Melbourne (Geneva Mus., type of 

 higlumis); South Australia, Adelaide (Vienna Mus., 

 types of subaptcra). 



The examples in the Stockholm Museum are much 

 larger than the type, the tegminal rudiments are slightly 

 more articulated and the angles of the 8th abdominal 

 tergites are yellow. The Oxford Museum specimens are 

 intermediate betvveen this form and tlie typical form. 



20. P. perplcxa, sp. n, 



^ . Allied to P. bighimis, Sauss., but differing in the smaller size, 

 rvifous antennae, unicolorous coxae and in the almost entire absence 

 of denticulations from the supra-anal lamina. The lateral margins 

 of the 7th abdominal tergite are not serrate. 



Length 13 mm. ; pronotum 4 mm. x 5'8 mm. 



Tasmania (Oxford Mus., type). 



