126 INBECTA. 



tion, presenting' the appearance of another joint. The antennae are 

 slender, and consist of highly elongated and almost cylindrical joints. 



Megascelis, Dej., Lat. 



The eyes are somewhat emarginatcd. 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 maxillae. 

 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 antennse 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 maxillae, 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 Cassidae excepted, are generally slenderer and shorter. Each 

 testis is formed by a single capsule. 



All the larvae 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 then selves 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 exuviae of the 

 larva folded into a pellet. These chrysalides are frequently of various 

 colours. Some of the larvae penetrate into the earth. 



These Insects are generally small, and are frequently ornamented 



* The Lema viitata, ctiprea, niiidula, Fab. 



