102 



ILLINOIS BIOLOGICAL MONGRAPHS 



[102 



EXPLANATION OF PLATES 

 Abbreviations 



The lines in figures 6, 26, 51, 146, 147 have a value of 0.5mm; in figures 5, 7, 13-17, 19-20, 

 27-29, 31-34, 36, 37, 44-46,54, 56, 57, 61, 68-75, 77, 82, 83, 89, 91,92,97-99, 101, 102, 104, 107, 

 108, 111-113, 118, 119, 121-133, 136, 138, 140, 141, 145, 150-154, a value of 0.01 mm; in all 

 other figures, a value of 0.05 mm. 



