50. Diagram showing variations in elytral pattern of 



the flower beetle 274 



51-53. Frequency polygons of variation in elytral pattern 



of the flower beetle 275-279 



54; 55. Diagrams showing variation in the yellow jacket.. 284; 285 



56. Leaf hopper, Typhlocyba comes 288 



57. Diagram showing variation in pattern of prothorax 



of a flower-bug 291 



58. Water boatman, Corisa sp 293 



59. Parnassian butterfly, Parnassius smintheus 295 



60. A\WQ.x\z?ci\ coc\i.xo?Lz\i^ Periplaneta americana 296 



61. Red-legged locust, Melanoplus femur-rubruin... 301 

 62-69. Frequency polygons of variation in the red-legged 



locust 302-305 



70. Seventeen-year locust. Cicada septendeclm 306 



71-78. Frequency polygons of variation in Cicada sep- 



tendecitn 307-3 10 



79. Antenna of scale insect, Ceroputo yuccce 311 



80. Biting bird-louse, Z.z^^Mr?^5 cc/er 314 



81. Fredaceous ground-beetle, Pterostichus sp 317 



