COLEOPTERA. 549 



antennae which are wider; and by their thorax, which is dilated near 

 the middle of each side into an angle or tooth(l). 



Sometimes the mandibles are truncated; the palpi are terminated 

 by a strongly inflated truncated joint, with a little annular prolon- 

 gation, 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 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 max- 

 illae. These Insects, which are peculiar to South America, appear, 

 in some respects, to approach Colapsis, but their general form places 

 them among the Eupoda(2). 



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 antennae 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 appear- 

 ance of a palpus ; the interior division is broader and desti- 

 tute of the little squamous nail. The ligula is almost square 

 or oval, entire or widely emarginated. 



From the various anatomical researches of M. Leon Du- 

 four, it appears that the alimentary canal is at least thrice the 

 length of the body : that the esophagus is most usually in- 

 flated behind the crop, and that the chylific ventricle or sto- 

 mach is commonly smooth, at least throughout a great part of 

 its extent. The biliary apparatus resembles that of the Lon- 



(1) Crioceris subspinosa, Fab. 



(2) The Lema vittata, cuprea, nitidula, Fab. 



