Order 5. 



COLEOPTERA. 



553 



F>s. 85 



-Chrysomt-la populi . lag. 



0, l.lllttfU. 



Larva ; 2, Pupa ; 



Cfiri/somela sanguinolenta [a common British species], four lines long:, black or blue-black, with the sides of the 

 thorax thickened, and the elytra with a broad margin of red. It is found on the earth in titlds, at the sides of 



oot-paths. 



Chi-ysjmela popidi, Linn., is blue, with red elytra, havinfr a small 

 black mark at the tip. U is found in the wiUovv and poplar, on 

 which its larva lives, often in society. [It is vevy abundant in 

 England], and forms, with some others, the genus Lina of 

 iMetferle. 



We finish this tribe with those Chrysomelinae which have the 

 maxillary palpi slender at the tips, and terminated in a point. 



Phtedun, Me-^. (and Culophus, .Meg.), have the body ovoid or 

 orbicular. 



ProsocHiis. Latr. (Ilelodes. Fabr.), has the body narrow, more elongated, and the terminal joints of the antennae 

 form a sdaiijlit mass. [P. phellaiidiii, a common llritish species. Several other subgenera have been .separaed b) 

 r-i-ciit anilmrs, and of which the British species are described by Mr. Stephens, in his y//M».cii^i«H» o/il/(7i»A 

 Eittomology.\ 



Tlie third and last tribe of the Cyclica, Galerucita>, has the antenna always at least as long as half 

 the body, of equal thickness throughout, or gradually thickened to the tips, inserted between the eyes 

 at a little distance from the mouth, and generally close together at the base, and near to a small longi- 

 tudinal elevated line; the maxillary palpi, thickened in the middle, are terminaied by two joints in 

 form of a cone, but united together at the base, the last being short, and either truncated, obtuse, or 

 pointed ; the body is either ovoid or oval, and sometimes nearly hemispherical. Many, especially 

 amongst the smaller species, have the hind thighs thickened, which gives them the power of leaping. 



This tribe is composed of the genus 



Galeruca, — 

 Which we divide into two principal tribes— those which do not leap, Isopoda [having equal-sized feet], and those 

 which leap, Anisopoda, [or having unequal-sized feet]. 



Adorium, Fabr. (Oides, Weber), is composed of exotic species having the penultimate joint of the maxillary palpi 

 dilated, and the last much shorter, and truncate. 



Luperus, Geoff., has the last two joints of the maxillary palpi scafcely differing in size, and the antennae com- 

 posed of cylindrical joints as long as the body. [Small British species.] 



The others, which have the palpi terminated in the same manner, and the antennae, shorter, and composed of 

 reversed-conical joints, are the 



Galeruca proper [composed of numerous species, including] Chrysomela Tanaceti, Linn., which is oval-oblong, 

 black, but slightly shining, and with the elytra strongly punctured. It lives on the tansy. 



The Saltatorial Galerucitae, or those which have the posterior thighs thickened, arranged by Fabricius in his 

 genera Chrysomela, Galeruca, and Crioceris,aLre reunited into a single genus (Ha//(Ca), in the systems of Geoffroy, 

 Olivier, and Illiger. These beetles are very small, but adorned with varied and brilliant colours, and leap with 

 great agility and to a great height when disturbed. They often devastate the leaves of such vegetables as serve 

 them for food, their larva: devouring the parenchyme, and undergoing their transformations within the leaf. 

 Some species, especially those which have been called in France puces des jardiiis, Garden-tleas [and in tngland 

 Turnip-fleas], do much damage in the two states [of larva and imago], to pot-herbs, [and especially to turnips just 

 sprung up.] South America is the country which, above all others, abounds with the greatest number of these 

 insects. Illiger has published, in his £H<o»io/o(7(c«^ J/u^az/we, an e.\ce. lent mono.:rapli on these insects, which 

 he has distributed into nine families, some of which appear to us to form distinct subgenera. 



Octogonutes, Drapiez, differs from all the rest in having the ma.xillary palpi with the third joint swollen, and 

 the last very short and truncate ; the labial are terminated in a point, as in the following subgenera, but in these 

 the maxillary palpi are similarly terminated, or subulated at the tip. The last joint of the hind tarsi of Octogonotes 

 is suddenly swollen and rounded above, with the claws very small. 



CEdionyckus, Latr., differs from all the following by possessing the last-mentioned character, and includes the 

 first two families of Illiger. The only European species is A. marginclla, Olivier, found in Spain and Portugal. 



In the following subgenera, the last joint of the hind tarsi is gradually thickened, and terminated by two 

 ordinary-sized claws. 



Psylliodes, Latr., has the first joint of the hind tarsi very long, inserted above the posterior extremity of the 

 tibia, which is produced into a conical appendage, compressed, toothed at its edges, and terminated by a small 

 tooth. It corresponds with llliger's ninth family .4i<i7ar««s. H. chrysocep/iala, S:c. — H. d^ntipes, aridella, &c., 

 having the posterior tibiae dilated in the middle into a tooth, form another subgenus. 



Dibolia, Latr. (previously Altitarsus, Latr.), has the head for the most part received into the thorax, and the 

 posterior tibiae terminated by a furcate spine, (llliger's eighth family, A. echii, Oliv., &c.) 



Altica. ! nu., has the head exposed, the posterior tibise truncate at the tips, without any prolongation or fork, 

 and the tarsi terminal and short. Type, Chrysomela oleracea, Linn, [and numei-ous other British species, arranged 

 by Stephens iiitu several new subiienera, forming Uliger's third, fourth, fit'th, and sixth families.] 



Longitarsm, Latr., has all the characters of Haltica proper, but the posterior tarsi are at least as long as the 

 posterior tibiae. (Uliger's seventh family.) 



