172 INSECTA. 
them included. The females are provided with aserrated ovipositor. 
MM. Randohr, Marcel de Serres, Leon Dufour, and Straus, have 
studied the anatomy of several Insects belonging to this family. The 
latter naturalist -has not yet published the result of his investigations. 
The researches of M. Dufour are the most extensive and complete, at 
least so far as respects the digestive system and the organs of gene- 
ration. A proof of this is readily obtained by referring-to his Memoir 
entitled Recherches Anatomiques sur les Cigales, inserted in the fifth 
volume of the Annales des Sciences Naturelles. We will not follow 
this profound observer into the multitude of interesting details re- 
specting their organization which he presents to us, and which he 
accompanies with excellent figures, but restrict ourselves to the de- 
scription of an anatomical character which appears to be exclusiyely 
peculiar to these Insects. 
In all of them, according to him, the chylific ventricle or stomach 
is remarkably long; it commences by a curved or straight, oblong 
dilatation, and always terminates in an intestiniform canal, which is 
flexed on itself in order to arrive at the origin of this same ventricle, 
into which it opens by the side of the insertion of the hepatic vessels, 
not far from the commencement of the intestine; they all have four 
biliary vessels. In the Cicadze this ventricle has the figure of an ear, 
of which the right side is dilated into a large lateral and frequently 
plaited pouch; its upper extremity is tied to the esophagus by a supe- 
rior ligament, and the other leads to this narrow, very long, tubular, 
reflected prolongation which has the form of an intestine, and which, 
after these circumvoluticns, re-ascends to join that pouch near the in- 
sertion of the hepatic vessels. This singular disposition of the chylific 
ventricle, which, after several convolutions, empties into itself, in 
continuing a complete circle traversed by the alimentary liquid, is 
doubtless a difficult matter to explain physiologically, but it is not the 
less a well determined and constant fact, and one which forms the 
most characteristic trait in the anatomy of the Cicada and other 
Cicadariz. Inthe Ledra auriia of Fabricius, or Procigale Grand- 
diable of Geoffroy, the inflated portion of the chylific ventricle is 
placed directly after the crop, and there is but a single cluster of 
salivary sacs on each side, a character also observed in the Cercopis 
spumaria, while in the Cicadee there are four, two on each side. In 
the Membracis cornutus the duodenal ear-like sac is replaced by a 
large pouch, but also attached to the esophagus by a suspensory fila- 
ment,a character exclusively peculiar to these Insects, 
Some—Cantatrices—have antenne composed of six joints, and 
