72 



sue the study farther, and his illustrations are drawn chiefly from 

 species found in this country. 



Papilionidae— The butterflies, day-fliers. 



Sphingidae— The hawk-moths or humming-bird-moths. Mostly 

 twilight flyers. J 



Aegeridae— The aegerians, whose larvae are mostly root "or stem-bor- 



GrS. 



Zygaenidae—A small family containing species which appear to be 

 • intermediate between butterflies and true moths. 



Bombycidae— The spinners. Some are beneficial,, others injurious. 



Noctuidae~The owlet moths. A very extensive family of mostly 

 dull colored moths including a large portion of the species whose cat- 

 erpillars do so much injury to the farmer, orchardist and gardener. 



Geonwtridae, (phalaenidae)— The geometers or measurers- whose 

 larvae, on account of the peculiar looping of the body when moving 

 nave received the name of measuring worms. 



Pyralidae- The snout-moths, so called from their long, slender and 

 somewhat flattened feelers, (palpi). 



Tartricidae— The leaf rollers; so called on account of the habit which 

 the larvae have of rolling up the leaves of the trees and plants on 

 which they feed. r 



Tineidae— The tineids, a very extensive family of minute moths, 

 which, in the larval state are found attacking vegetation at almost 

 every point and in various modes. 



Pterophoridae-The plume moths ; a small family, so called on ac- 

 count of the feather form of their wings. 



HEMIPTERA. 



This^order as before stated, is divided into two sub-orders, the dif- 

 ference in the wings being the chief characteristic that separates 

 them, but there are corresponding differences which run through 

 these divisions, though not so manifest as that presented by the 



Sub-order. Homo^tera.— The following are the families belong- 

 ing to this section or division of the order. 



Ckadidae— The cicadae, .seventeen year locust, harvest-flies &c • 

 these injure plants to a certain extent by piercing them with the 

 °lants de P 0Sltin g eggs therein ; also by sucking the juices of 



Fulgoridae and Cercopidae— Tree and leaf-hoppers which do more or 

 less injury to plants, especially woody plants, by piercing the bark, 

 stems, twigs,'leaves, <vc., and sucking the juices therefrom. 



Psyllidae and Aphidae— Plant lice; injurious. 



Coccidae— Bark-lice ; injurious. 



SUB-ORDER — HETEROPTERA. 



This division contains the following families : 



Notoiwctvdm and iVe^ae— Predaceous water-bugs, and hence benefi- 

 cial. 



