258 Mr. K. Shelford's Studies of the Blattidae. 



2. Legs aeneous. 



3. Body above without tubercles. 

 4. Pronotum with 2-4 deep punc- 

 tures on the disc P. liwhata, Burm. 



4'. Pronotum without these punc- 

 tures P. iridicolor, Tepp. 



3'. Body above with tubercles ... P. bagoti, Tepp. 

 2'. Legs testaceous or castaneous. 

 3. Pronotum not tuberculate. 



4. Posterior margin of pronotum not 



ochreous-yellow P. cvpi'ea, Sauss. 



4'. Posterior margin of pronotum 



ochreous-yellow P. impi-essa, Tepp. 



3'. Pronotum tuberculate P. obscuroviricUs, Tepp. 



1'. Dorsal surface unicolorous (except for 

 margins of supra-anal lamina and 

 cerci). 

 2. Large species with dense sericeous pile. P. pubescens, Tepp. 

 2'. Smaller species, sericeous pile absent 

 or very sparse. 

 3. Dorsal surface tuberculate .... P. oculata, Tepp. 

 3'. Dorsal surface not tuberculate. 



4. Colour dull bronze P. invisa, Walk. 



4'. Colour metallic green .... P. viridissima, sp. n. 



The above key must be regarded as merely provisional, 

 for I have not been able to see all the species described by 

 Tepper, and from the descriptions alone of these it is not 

 possible to determine their generic position with exactitude. 



1. P. limhata, Burm. 



Polyzosteria limhata, Burmeister, Handb. Ent., ii, p. 



483 (1838). 

 Polyzosteria aenea, Burmeister, t. c, p. 483 (1838). 

 Folyzosteriob purpurascens, Fischer, Orth. Eur., p. 93 



(1853). 

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



808 (1864). 

 Polyzosteria nitens, Walker, Cat. Blatt. Brit, Mus., 



p. 155 (1868). 

 ? Polyzosteria freoichii, Tepper, Tr. R. Soc. S. Australia, 



xviii, p. 178(1894). 



The species is well known and does not require re- 

 description. It is very variable, as can be guessed from 



