292 Mr, E.. Shelford's Stud.ics of the Blattidae. 



4. C. heydcniana, Sausp. 



Feriplaneta Jiei/deniana, Saussure, Rev. Zool. (2) xvi, 



p. 317 (1864). 

 Polyzostcria hcydeniana, Saussure, Mem. Soc. Sci. 



Phys. Nat. Geneve, xx, p. 256 (1869). 

 Pcriplancta marginifera, Walker, Cat. Blatt. Brit. 



Mus., p. 144 (1868). 



West Australia, King George's Sound (British Mus., 

 type oi marginifera; Oxford Mus.; Geneva Mus., type of 

 heydeniana ; Paris Mus.), Albany (Hamburg Mus.). 



5. C. sedilloH, Bel. 



Polyzostcria sedilloti, Bolivar, Ann. Soc. Ent. France 

 (6) ii, p. 459 (1882). 



In the $ the posterior angles of the posterior abdominal 

 tergites are rounded and they are not much produced 

 in the $. 



New Zealand (coll. Bolivar, type ; Oxford Mus.). 



6. C. hrunni, Alfk. 



Platyzosteria hrunni, Alfken, Abh. Ver. Bremen, 

 xvii, p. 142 (1901). 



Known to me only from the description. It is 

 apparently to be distinguished by its small size, but it must 

 be noted that sedilloti itself varies considerably in size, a 

 specimen in the Oxford Museum from the North island of 

 New Zealand being smaller than specimens from the 

 South island. 



Chatham Is. (Bremen Mus., type). 



Genus 6. Zonioploca, Stal. 



Zonioploca, Still, Bih. Svensk. Akad. ii (13), p. 13 (1874). 

 Kncphasia, Tepper, Tr. R. Soc. S. Australia, xvii, 

 p. 99 (1893). 



GJiaracters. Ocelli absent. Lateral margins of pronotum 

 incrassated. Dorsal si^rface granulate, or witli sliallow punctures. 

 Tegtninal rudiments absent. Posterior angles of abdominal tergites 

 5-7 strongly ^jroduced. Supra-anal lamina, ((^) quadrate, angles 

 obtuse, lateral margins entire, ( $ ) triangular, apex emarginate. 

 Sub-genital lamina d^) trapezoidal, styles lateral. Posterior 



