374 GENERAL BIOLOGY 



Truly Dean Swift was right when he said : 



"Great fleas have little fleas 



Upon their backs to bite 'em, 

 And little fleas have lesser fleas, 

 And so ad infinitum." 



References. 



Sanderson and Jackson's "Elementary Entomology." 

 J. Arthur Thomson, "Outlines of Zoology." 

 Linville and Kelly, "A Text-book in General Zoology." 

 Leland O. Howard, "The Insect Book." 

 Vernon L. Kellogg, "American Insects." 

 Robert W. Hegner, "College Zoology." 

 J. H. Comstock, "Insect Life." 



J. H. and A. B. Comstock, "A Manual for the Study of Insects." 

 A. S. Pearse, "General Zoology." 

 C. A. E'aland, "Insects and Man." 



E. Dwight Sanderson, "Insect Pests of Farm, Garden and Orchard." 

 L. S. and M. C. Daugherty, "Principles of Economic Zoology." 

 Joseph Lane Hancock, "Nature Sketches in Temperate America." 

 Riley and Johannsen, "Handbook of Medical Entomology." 

 Jordan and Kellogg, "Animal Life." 

 Jordan and Kellogg, "Evolution and Animal Life." 

 Riley, "Destructive Locusts." U. S. Department of Agriculture, 

 Bulletin No. 25, 1891. 



C. F. Hodge and S. Dawson, "Civic Biology." 



James A. Nelson, "The Embryology of the Honey Bee." 



