70 



COLEOPTERA. 



As Dr. LeBaron's Fourth Report gives the names and characters of 

 the families of this order, I will only mention the family names and 

 the kind of insects belonging thereto. 



Cicindela and Carabidas — Predaceous ground-beetles ; very beneficial. 



Dytiscidae and Gyrinidas — Predaceous water-beetles ; beneficial. 



Hydrophilidas — Water scavenger-beetles ; beneficial. 



Silpkidae, Histeridae and a number of other small families. Land 

 scavenger-beetles , mostly beneficial. Nitidulidse and Dermestidas 

 which belong in this group, contain a few injurious species. 



Staphylinidse — Minute, short-winged scavenger-beetles ; beneficial. 



Lucanidae — The stag-beetles; mostly innoxious; a few injurious. 



Coprida'e. Aphodiidag. Geotrupidas and Trogidae — Dung-beetles ; 

 mostly beneficial ; a few injurious. 



Dyiiastidas, Melolonthidae, Rutelidae and Cetoniidae,- — Leaf-chafers; 

 more or less injurious, both in the perfect and larval state. 



Buprestidae — Saw-horned wood-beetles. Injurious; the larva? being 

 chiefly wood or stem borers. 



Elateridas — Wire-worm beetles. Larvae injurious to roots of grass 

 and other plants. 



Ptinidas Lymexylonidas Cupesidae — Small wood-beetles. The larvae 

 * and some of the perfect insects injure trees and other plants b}' bor- 

 ing into theiri. 



Lampyridas and Cleridas — Carnivorous species ; mostly beneficial. 



Bruchidze and Curculionidae — Snout-beetles; injurious to all parts of 

 plants, especially the fruits. 



Scolytidae — Short-horned wood-borers; larvae injurious. 



Cerambycidae — Long-horned wood-borers ; larvae injurious. 



Chrysomelidae — Plant-beetles; larvae, and in some cases the perfect 

 insects injurious, eating the foliage of plants, etc. 



Coccinellidae — "Lady-bugs;" beneficial. 



ORTHOPTERA. 



This order contains but few families, which are easily recognized. 



Blattidae — The cockroaches ; injurious. 



Mantidae — Soothsayers or "Devil's horses ;" beneficial. 



Phasmidae — Spectres or walking-sticks ; innoxious. 



Acrididae — The true locusts, but usually called grasshoppers in this 

 country ; very injurious. 



Locimtidae — The true grasshoppers, but generally known as katy 

 dids and wingless crickets; injurious. 



Gryllidae — The true crickets ; more or less injurious. 



NEUROPTERA. 



There are but few species belonging to this order which are injuri- 

 ous, and so far as the Illinois species are concerned, we may place the 

 entire order on the side of beneficial insects, the exceptions being so 

 few. 



