126 INSECTA. 
tion, présenting the appearance of another joint. ‘The antenne are 
slender, and consist of highly elongated and almost cylindrical joints. 
Meeasceus, Dej., Lat. 
The eyes are somewhat emarginated. The mandibles are thick. 
The exterior maxillary lobe is narrow, cylindrical, and curved in- 
wards. The labial palpi are almost as large as those of the maxille. 
These insects, which are peculiar to South America, appear, in some 
respects, to approach Colapsis, but their general form places them 
among the Eupoda *. 
FAMILY VI. 
CYCLICA. 
In our sixth family of the Tetramera, where the three first joints 
of the tarsi are still spongy, or furnished with pellets beneath, with 
the penultimate divided into two lobes, and where the antenne are 
filiform or somewhat thicker towards the end, we observe a body 
usually rounded, and in those few where it is oblong, with the base 
of the thorax of the width of the elytra and maxille, whose exterior 
division, by its narrow, almost cylindrical form and darker colour, has 
the appearance of a palpus; the interior division is broader and des- 
titute of the little squamous nail. The ligula is almost square or 
oval, entire or widely emarginated. 
From the various anatomical researches of M. Leon Dufour, it 
appears that the alimentary canal is at least thrice the length of the 
body; that the esophagus is most usually inflated behind the crop, 
and that the chylific ventricle or stomach is commonly smooth, at least 
throughout a great part of its extent. The biliary apparatus resem- 
bles that of the Longicornes in the number, and double insertion of 
the vessels which compose it; they amount to six, two of which, those’ 
of the Cassidz excepted, are generally slenderer and shorter. Each 
testis is formed by a single capsule. 
All the larvze known to us are furnished with six feet, have a soft, 
coloured body, and feed, as well as the perfect Insect, on the leaves of 
vegetables, to which they usually attach themselves by means of a 
viscid or adhesive humour. There also many of them become nymphs, 
at the posterior extremity of which is found the last exuvie of the 
larva folded into a pellet. These chrysalides are frequently of various 
colours. Some of the larvee penetrate into the earth. 
These Insects are generally small, and are frequently ornamented 
* The Lema vittata, cuprea, nitidula, Fab. 
