180 AN INTRODUCTION TO E.\ 



ape, and 



vnown to grape grov. Thrip." These all belon 



the genus lirvt/ironi'itni. The < union one i> /:". TV//.V. It is 



a little more than 3 mm. (o.\2 inch) in length, crossed by two blood- 

 ind a third dusky one at tlu- apex. These lnse< 



winter in the j)erfect state-, hibernating under dead K 



.bbish; in the spring they deposit their eggs on the young 

 I tlie vine. The lame hatch during the month of June, and 

 :nble the adult insect except in size and in being destitui 

 wing. The insects feed together on the under side of the le.; 

 and are very quick in their movements. Like the preceding 

 this insect can be destroyed by trap-lanterns or by \\risl 



The Rose Leaf-hopper, Empoa rosa. "Swarms of these in 

 may be found, in vuriou- of growth, on the leaves of the r< 



bush, through the greater part of the summer, and even in winter 

 upon housed plants. Their numerous cast skins may be seen adher- 

 ing to the lower sides of the leaves. They pair and lay their < 

 about the middle of June, and they probably live through the winter 

 in the perfect state, concealed under fallen leaves and rubbish on the 

 surface of the ground." Although this is a very common pest, it 

 does not seem to have received much attention from entomologists 

 since the time of Harris, from whom the above account is quoted. 

 It should be combated in the same way as the leaf-hoppers already 

 described. 



Sub-family II. TETTIGOMN i 



The members of this sub-family are mostly small or medium- 

 insects, with long narrow bodies. Hut we find here some forms 

 which resemble certain genera belonging to the Cercopid;e. Thus 

 rcnthitnia includes plump, short-bodied insects, which remind u 

 Clastdptera; and the genus (iVpona includes a large number of spet. 



which resemble very closely certain species of Aplirophora. 

 It is, however, hardly necessary to remind the student that a glance 

 at the ; leaf-hoppers will enable one to dis- 



tinguish them from tl: ]>ids. which they SO closely resemble. 



The genus Diedroctyhala includes grass-green, or pale-green, 

 dle-shap ; <:s which represent better the typical form of 



this sub-family. The member^ of this genus may 1' .i/ed by 



the long, triangular hea<: n from above. One of the 



* Tettigonlnac, Tettigonia : tettix (rerrts), a cicada; gonia (yoovia), a corner. 



