PALyEONTOGRAPHICAL SOCIETY, I92O . 



Bolton . Insects of Coal Measures. 



PLATE IX. 



7.Vi 



1. PHYLOMYLACRIS. 2-4. S OOMYLACRIS . 5. ORTHOMYLACRI S. 

 6. ( BLATTOIDEA.) 7. 8. LEPTOBLATTINA. 



