108 MBST LMB80N8 IN ZOOLO&T. 



nate them. Myriad as are their forms, eyery species has 

 slightly different habits and surroundings from its allies, 

 and thus fills a niche in the insect-world which it alone can 

 occupy. And it is this wonderful power of adaptation to 

 changes in circumstances, as well as their solid skins and 

 complete metamorphosis, which has enabled the great 

 beetle order of over 80,000 kinds to become so abundant 

 and prominent a group. They are preyed upon at different 

 times of life by different enemies. "Worms, parasitic mites, 

 and birds and beasts constantly make war upon them, but 

 these enemies only reduce their numbers to healthy limits; 

 so that, after all the inroads made upon them, there are still 

 food enough and room enough for each kind to exist in its 

 own beetle-fashion in its own little beetle-world. 



LlTBRATUBE. 



Dejean et Avbe. Species generales des ColeoptSres. 6 vols. , 8vo. 

 Paris, 1835-38. 



Qemminger and Harold. Catalogue of all described Coleoptera, 

 with synonyma. 13 vols. Municli, 1868-76. (Lat.) 



Lacordaire, J. T., et Ohapuis. Genera des Coleopteres. i.-vii. 

 Paris, 1854. 



Le Conte, J. L. , and Q. IS. Horn. The Rhychophora of America 

 North of Mexico. Proc. Am. Phil. Soc, 1876. — Classification of the 

 Coleoptera of North America. Smithsonian Inst., 1883. 



Henshaw, 8. List of the Coleoptera of North America. 1885. 

 Supplement, p. 8. 1887. 



Horn, 6. H. Revision of North American Tenehrionidse. Trans. 

 Am. Phil. Soc, 1870. — Descriptive catalogue of species of Nebria and 

 Pelophila. Trans. Am. Ent. Soc, II. 1870. — Synopsis of Malachidse 

 of U. S. Trans. Am. Ent. Soc, iv. 1873.— A Monograph of the 

 Species of Chrysobothris inhabiting the United States. Trans. Am. 

 Ent. Soc , XIII. 1886. — A Monograph of the Aphodiini inhabiting the 

 United States. Trans. Am. Ent. Soc, xiv. 1887. 



Sehaupp, F. Q. Synopsis of the Cicindelidae of the U. S. Bull. 

 Ent. Soc. Brooklyn, vi. 1884. (Every species with a colored figure.) 



8tal, C. Monograph of American Chrysomelidae. Upsala, 1863-5. 



Also articles by Austin, Blanchard, Casey, Fitch, Fuchs, Harris, 

 Hubbard, Matthews, Melsheimer, Randall, Say, Schwarz, J. B. Smith, 

 Ulke, Ziegler, Zimmermann, and others in Trans. Am. Ent. Soc. 

 Phil.; Bull. Brooklyn Ent. Soc; Entomologica Americana; Can. 

 Entomologist, etc. 



