COLliOPTEIlA. 391 



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 certain 

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

 does as much mischief as certain caterpillars. 



The jumping Galerucitae, or those whose posterior thighs are inflated, and 

 which are distributed by Fabricius among the genera Chrysomela, Galeruca, 

 and Crioceris, are united in one, that of Altica 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 undergo their 

 metamorphosis. Certain species, those particularly which are commonly termed 

 garden Jlcas, are very injurious in both states to our kitchen gardens. Of all 

 countries, South America furnishes the greatest number. 



ALTICA, Latreille. 



In the true Alticte, the head is salient, and the posterior tibiae are truncated 

 at their extremity and without any particular prolongation or forked spine ; 

 the tarsus originates from this extremity, and its length is not equal to half 

 that of the tibia. 



A. olemcea. About two lines in length; oval, elongated; green or bluish; 

 a transverse impression on the thorax ; elytra finely punctured. On vegetables. 

 It is the largest of the European species. 



FAMILY VII. 

 VIPALPI. 



THE insects of our seventh and last family of the Tetramera are distin- 

 guished from all those of the same section, having, like them, the under part 

 of the three first joints of the tarsi furnished with brushes and the penultimate 

 bifid, by their antennae, which are terminated in a very distinct and perfoliated. 

 club, as well as by then- maxillae, armed on the inner side by a nail or corneous 

 tooth. In some few, the joints of the tarsi are entire, but they are removed 

 from the other Tetramera with analogous tarsi by their body, which is almost 

 globular and contracts into a ball. 



Their body is most commonly of a rounded form, and frequently even very 

 convex and hemispherical ; the antennae are shorter than the body, the man- 



