COLEOPTERA 



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While the ambrosia-beetles are chiefly injurious to forest-trees, there 

 are certain species that injure wine and beer casks; and one species, 

 the pear-blight beetle, Anisandrus pyri, sometimes infests the tips of 

 pear and apple branches, causing an injury that is often mistaken for the 

 bacterial disease known as pear-blight. 



Nearly four hundred species of scolytid beetles, representing many 

 genera, have been described from America north of Mexico. 



FAMILIES OF COLEOPTERA NOT DISCUSSED 



The order Coleoptera includes a great number of families the mem- 

 bers of which are rare or little known. The special student of the beetles 

 is referred to " An Introduction to Entomology " by J. H. Comstock and to 

 special treatises on the Coleoptera for an account of the families which we 

 have not been able to discuss in this Manual. 



Omophronidae 



Haliplidee 



Amphizoidas 



Rhysodidas 



Clavigeridas 



Pselaphidae 



Histeridas 



Sphasritidae 



Scaphidiidas 



Platypsyllidag 



Leptinidae 



Scydmaenidae 



Clambidas 



Brathinidas 



Corylophidas 



Trichopterygidae 



Sphasriidae 



Psephenidas 



Dryopidae 



Elmidae 



Ptinidae 



Anobiidas 



Bostrichidas 



Lyctidae 



Nosodendridas 



Byrrhidae 



Chelonariidas 



Cupesidae 



Dascillidas 



Eucinetidae 



Helodidas 



Nitidulidae 



Rhizophagidae 



Ostomidas 



Eucnemidae 



Cerophytidas 



Throscidae 



Phalacridas 



Mycetophagidae 



Cryptophagidas 



Erotylidas 



Rhipiceridae 



Derodontidas 



Cleridas 



Corynetidae 



Melyridas 



Lymexylidae 



Cebrionidae 



Plastoceridas 



Phengodidas 



Lycidae 



Micromalthidas 



Endomychidae 



Lathridiidae 



Monotomidas 



Heteroceridae 



Colydiidae 



Murmidiidae 



Mycetaeidas 



Cisidae 



Georyssidag 



Lagriidas 



Othniidas 



Sphindidas 



Eurystethidae 



Alleculidas 



Monommidae 



Melandryidae 



Pythidae 



CEdemeridae 



Cephaloidae 



Pedilidas 



Anthicidas 



Euglenidae 



Pyrochroidas 



Rhipiphoridas 



Mordellidas 



