284 MANDIBULATA. COLEOPTERA. 



all subequal, occasionally the posterior are greatly incrassated : tarsi tetra- 

 merous'j the three basal joints spongy below, the penultimate bilobed. 



The larvae of tlie insects of this subsection, so far as known, have 

 six legs and a soft body, and feed like the perfect insect upon the 

 leaves of vegetables, to which they are affixed by a gelatinous sub- 

 stance : the insects are generally of small size, of brilliant colours 

 and glabrous, and may be readily divided into the following 

 families : 



Antenna: basi approximatse, exsertse : . .50. GalerucidjE. 



ad basin thorace occultatae : 52. CassidiadjE. 

 reraotae: .... 51. ChrysomeliDjE. 



Family L.~GALERUCID^. 



Antennce inserted near the mouth between the eyes, mostly approximating at the 

 base, filiform or a little thickened at the apex, the joints somewhat obconic or 

 subcylindric. Palpi with the apical joint mostly conic and acute at the apex: 

 maxillw with the lobes subequal, the outer sublinear, the inner subquadrate: 

 body ovate, or quadrate- ovate : legs all subequal, or the posterior ^mora con- 

 siderably incrassated and formed for leaping. 



The typical Galerucidse are generally of plain and simple colours, 

 but amongst the conterminous species are some of resplendent 

 lively metallic hues : the former affect damp and marshy situa- 

 tions, while the latter are found chiefly amongst herbage in fields 

 and gardens, to which they are sometimes very destructive. The 

 British species appear to be easily divisible into the following 

 genera : 



Pedes omnes subeequales, postici non saltatorii. 



Antennce art". 2-do 3-tioque aequalibus 4-to brevioribus. 



iainwi antice emarginatum : . . 392. Adimonia. 



integrum, sublobatum ; . 395. Calomicrus. 

 art". 2-do 3-tio diniidio aut ultra breviore. 

 corpore breviores. 



articulis subobconicis, brevibus : . , 393. Gai.eruca. 



elongatis, subcylindricis : . . 391. Auchenia. 



corporis longitudine, articulis elongatis : . 394. Luperus. 



* In many of the tetramerous insects a minute fifth joint, placed within the 

 lobes of the third, may be detected, by means of a high power, especially in 

 Timarcha and others of the Chrysomelidffi. 



