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



27. P. ohsmra, Tepp. (PI. VIII, fig. 19.) 



Ferij^lcmeta obscura, Tepper, Tr. R. Soc. S, Australia, 

 xvii, p. 107 (1893). 



With some doubt I refer two (^ ^ in the Hamburg and 

 Oxford Museums to this species. 



Piceous, nitid, impunctate except for a few faint punctures on tlie 

 distal tergites. Antennae fuscous. Tegminal rudiments present, 

 not quite completely articulated. Supra-anal lamina trigonal, apex 

 truncate, rather deeply emarginate, lateral margins entire, faintly 

 concave, exceeded by cerci. Sub-genital lamina quadrate, posterior 

 margin concave, no spine at base of styles. Coxae narrowly bordered 

 with testaceous. Legs piceous. 



Length 20'1 mm. ; pronotum 5'1 mm. x 8 mm. 



South Australia, Northern Territory (Adelaide Mus., 

 type) ; West Australia, Fremantle {Michadscn and 

 Hartmeyer), (Hamburg Mus. ; Oxford Mus.). 



The species which was originally described from a $ 

 only cannot be recognised with any real certainty. 



28. P. scahriuscula, Tepp. (PI. VIII, fig. 20.) 



Periplaneta scabrmscula, Tepper, op. cit., p. 108(1893). 



Piceous, nitid, dorsal surface with minute acute tubercles most 

 marked on the middle abdominal tergites. Tegminal rudiments pre- 

 sent and completely articulated. Posterior margin of 7th abdominal 

 tergite sinuate, its posterior angles not very strongly^ produced. 

 Suj)ra-anal lamina, ((^) quadrate, lateral margins entire, posterior 

 margin concave, rufo-fimbriate, ( $ ) triangular, cucullate, apex 

 truncate, emarginate, lateral margins entire. Cerci exceeding the 

 supra-anal lamina in both sexes. Sub-genital lamina (^) quadrate. 

 Coxae not bordered with testaceous ; legs castaneous. 



Length 12-17 mm. ; pronotum 4-5 mm. x 7-7'5 mm. 



South Australia, various localities (Adelaide Mus., 

 types) ; West Australia (Hamburg Mus. and Oxford 

 Mus. {Michadscn and Hartmeyer)). 



29. P. rvfoterminata, Br. (PI. IX, fig. 30.) 



Polyzosteria rufoterminata, Brunner von Wattenwyl, 

 Nouv. Syst. Blatt, p. 219 (1865). 



Described from a % only. It is characterised by the rows 



