PAL/CONTOGRAPH I CAL SOCIETY, 1919. 



Bolton . Insects of Coal Measures. 



PLATE 111 



l.LITHOSIALIS. 2.PRUVOSTIA. 3. SPILAPTERA. 

 4.BOLTONIELLA. 5-8.BRODIA. 



J W Tutcher, photo 



London Stereoscopic Co imp. 



