268 Mr. E. Shelford's Studies of the Blattidae. 



5'. Legs piceous or dark cas- 

 taneous. 

 6. Small species (less than 

 16 mm.). 

 7. 7th abdominal tergite 

 with posterior margin 

 subsinuate .... 

 7'. 7th abdominal tergite 

 with posterior margin 

 not subsinuate . . . 

 6'. Larger species .... 

 3'. Tegminal rudiments on their 

 inner side completely separated 

 from the mesonotum. 

 4. An orange spot on each side of 

 the 7th abdominal tergite . . 

 4'. No orange spots on the 7 th 

 abdominal tergite. 

 5. Apex of tegminal rudiments 

 obliquely truncate . . . 

 5'. Apex of tegminal rudiments 

 tapering. 

 6. Coxae bordered with flavo- 

 testaceous. 

 7. Castaneous, robust species 

 7'. Piceous, narrower and 



smaller 



6'. Coxae unicolorous. 



7. Meso- and meta-notum 



minutely scabrous . . 



7'. Meso- and meta-notum 



smooth, nitid, with 



shallow punctures. 



8. Small species (14 mm.) 



8'. Larger species. 



9. Castaneous . . . 

 9.' Piceous. 



10. Metanotum with 

 two deeply im- 

 pressed points . 

 10'. Metanotum with- 

 out these points. 

 11. Posterior mar- 

 gin of 7th ab- 



P. biloha, Sauss. 



P. perplexa, sp. n. 

 P. curiosa, Shelf. 



P. bicolor, Kirby. 



P. novcie-seelandiae, Br. 



P. castanea, Br. 

 P. ohscura, Tepj:). 



P. scabrhisciila, Tepp. 



P. riifoterminata, Br. 

 P. pseuducastanea, Tepp. 



P. ceratodi, Krauss. 



