PAL/EONTOGRAPHiCAL SOCIETY, 1919. 



Bolton . Insects of Coal Measures. 



PLATE III. 



1.LITH0SIALIS. 2.PRUV0STIA. 3.SPILAPTERA. 

 4.BOLTONIELLA. 5-8.BRODIA. 



J.W.TutcKer, photo London Stereoscopic Co. imp. 



