COLEOPTERA. 133 



distinguished from all the others of this family by the maxillary palpi, 

 the last joint of which is much larger and securiform *. 



In the two following subgenera the same joint, also well separated 

 from the preceding one, and quite as large or larger, is more or less 

 semi-ovoid. These insects are more abundantly disseminated through- 

 out the eastern continent, and Europe in particular. 



T mxKCH A, Mey., Dej. 



The Timarchse, which were formerly placed among the Chryso- 

 melse, comprise those which are apterous. Their body is gibbous, the 

 antennae are granose, inferiorly in particular, the elytra united, and 

 the tarsi visually much dilated, at least in the males. 



These Chrysomelinae are found on the ground in the woods, on 

 grass, and along the edges of roads. Tiieir g.iit is slow, and they 

 emit a yellowish or reddish humour from the articulations of their 

 legs. They are most common in the south of Europe and north of 

 Africa, 



Among those in which the thorax is narrowed posteriorly, and 

 approaches to the form of a crescent, and generally the largest 

 species, is placed, 



T. tcevigala ; Tenebrio Icevigatus, L. ; Oliv., Col., V, 91, i, 1 1 ,. 

 From four to eight lines in length ; black ; thorax and elytra 

 smooth, but finely punctured ; antennae and legs violet. 



Its larvee is greenish or violet, strongly inflated, and has a 

 fulvous extremity. It feeds on the yellow Gallium, and under- 

 goes its metamorphosis in the earth f . 



Chrysomela, proper. 



This subgenus will comprise such of Olivier's species as are fur- 

 nished with wings, and in which the maxillary palpi, according to our 

 previously established subdivisions, have the last joint as large as the 

 preceding ones, or larger, and in the form of a truncated, ovoid, or 

 reversed cone. Such are 



C . sanguinolenta, L. ; Oliv., lb., I, 8. About four lines in 

 length; black, or bluish-black; sides of the thorax thickened and 

 punctured ; elytra deeply punctured and widely emarginated ex- 

 teriorly with red. Found on the ground in fielda, and along the 

 borders of roads. 



C. cerealis, L.; Oliv., lb., VII, 104. Size of the preceding; 

 cupreous-red above, with longitudinal, blue streaks, three on the 

 thorax and seven on the elytra. Common in France. 



C.populi, L. ; Oliv., lb., VII, 110. Length from five to six 



* See Oliv., Col., V, 92; but we must take away the P. Jtavicans — Chrysomela 

 favicans, Fab. — which is a true Chrysomela. See also the Monograph of the same 

 genus, but under the name of Notoclea, published by M. Marsham ia the Transac- 

 tions of the Linnean Society. 



t Add the following species of Olivier, rugosa, scabra, latipes, coriaria, gcettingen- 

 sis. See also the Catalogue, &c., of Count Dejean : but as I only distinguish the 

 Timarchae from the Chrysomelae by the absence of wings, I am not sure that all the 

 species he mentions are in this case. 



