36 INSECTA. 
The second section of the Hemiptera, that of the Homor- 
TERA, Lat., is distinguished from the preceding one by the 
following characters: the rostrum arises from the lowest por- 
tion of the head, near the pectus, or even’ from the interval 
between the two anterior legs: the elytra—almost always tec- 
tiform—are of the same consistence throughout and semimem- 
branous, sometimes almost similar to the wings. The three 
segments of the trunk’ are united en masse, and the first is 
frequently shorter than the second. . 
All the Insects of this section feed exclusively on vegetable 
juices. The females are provided with a scaly ovipositor(1), 
usually composed of three dentated blades, and lodged in a 
groove with two valves. ‘They use it as a saw to produce 
openings in plants in which they deposit their eggs. The 
last Insects of this section experience a sort of complete meta- 
morphosis. 
I will divide it into three families. 
FAMILY I. 
CICADARI ZA. 
This family comprises those which have triarticulated tarsi, 
and usually very small, conical, or fusiform antenne, com- 
posed of from three to six joints, the extremely attenuated 
seta which terminates them included. ‘The females are pro- 
vided with a serrated ovipositor. MM. Randohr, Marcel 
de Serres, Leon Dufour, and Straus, have studied the anatomy 
antenne is larger than the others, and because those of the anterior tarsi are 
almost of the same length, and the hooks of the posterior ones are large. The 
body is shorter, and the elytra entirely crustaceous, arched, and truncated at the 
exterior angle of their base. A piece is observed there, analogous to that re- 
marked in the same place in the Getoniz. 
(1) Called oviscapte by M. Marcel de Serres. 
