viii contents. 
Thysanoptera .. .. .. .. .. 542 
Diptera .. .. .. .. .. .. 545 
Blood-sucking Insects .. .. .. . . 659 
Rhynchota .. .. .. .. .. .. 665 
Song in Insects .. .. . - . , . . 720 
Index of Plants . . . . . . .. . . 765 
General Index .. .. . . .. .. 773 
