PAL/EONTOGRAPHICAL SOCIETY, I92O 



Bolton , Insects of Coal Measures. 



PLAT-. X. 



/ 



la. 



IV 



3. 



la-e. BOLTONITES. 2. TILLYARDIA. 

 3. ARCHIMYLACRIS. 



J W. Tutcher , photo 



London Stereoscopic Co - imp 



