COLEOPTEHA. 419 



anteriorly, when viewed from above, appears as if truncated at that ex- 

 tremity and destitute of a head. The antenna of some are more or less 

 serrated or pectinated; those of others are long- and filiform. The last 

 joint of the palpi is always ovoid. 



CHRYSOMELA. 



The body is usually ovoid or nearly oval, and the head salient, projecting, 

 or simply inclined; where the antennae are simple, about half the length of 

 the body, and most frequently granose and insensibly enlarged towards 

 the extremity. 



C.populiy L. Length from five to six lines; oval, oblong, and blue; ely- 

 tra fulvous or red, and the inner angle of their extremity marked with a 

 black dot. On the Willow and Poplar; its larva lives on the same trees, 

 and frequently in society. 



In the third and last tribe of the Cyclica, that of the GALERUCITJE, 

 we find antennae always at least as long as the half of the body, of 

 equal thickness throughout, or insensibly thicker towards their ex- 

 tremity, inserted be|ween the eyes, at but little distance from the 

 mouth, and usually approximated at base, and near a small longitu- 

 dinal carina. The maxillary palpi, thickest about the middle, ter- 

 minate in two joints, in the form of a cone, but opposed or united 

 at base, the last short, and either truncated or obtuse or pointed. 

 The body is sometimes ovoid or oval, and sometimes almost he- 

 mispherical. In several, and particularly the smaller species, the 

 posterior thighs are very stout, which enables them to leap. 



This tribe is composed of the genus 



GALERUCA, 



Which is divided into two principal sections; those which are destitute of 

 the power of leaping or the Isopoda, and the Jumpers or the Anisopoda. 



G. calmariensis. Three lines in length; yellowish or greenish above; three 

 black spots on the thorax; another with a stripe of the same colour on each 

 elytron. This species, together with its larva, is found on the Elm; in cer- 

 tain seasons, when unusually abundant, it strips these trees of their foliage, 

 and does as much mischief as certain caterpillars. 



The jumping Galerucitse, or those whose posterior thighs are inflated 

 and which are distributed by Fabricius among the genera Chrysomtla, Gale- 

 ruca and Crioceris, are united in one, that ofMtica or Haltica, in the systems 

 of Geoffroy, Olivier and Illiger. These Insects are very small, but are orna- 

 mented with various or brilliant colours; they jump with great quickness 

 and to a very great height, and frequently destroy the leaves of those plants 

 on which they feed. Their larvae devour the parenchyma, and there un- 

 dergo their metamorphosis. Certain species, those particularly which are 



