INSECTA. 471 



Family XL VII. Cyclica. Joints of tarsi as in the preceding 

 amily. Antennae filiform, or somewhat thicker towards the 

 end only, shorter than body. Maxillae without horny tooth, with 

 ;xternal division palpiform, often biarticulate. Ligula thick, sub- 

 quadrate or oval, entire or little emarginate. 



Circulars. They are coleopterous insects of small or only moderate 

 size, which feed on plants, especially on leaves. The species here 

 belonging were collected by LINNAEUS under the genera Cassidcu, 

 Chrysomela and Nispa. 



Phalanx I. Chrysomela (Chrysomelidce LEACH). Antennse re- 

 [aote at the base, inserted before the eyes. 



Chrysomela L. (exclusive of many species), LATE. (Cuv. R. 

 lira.). Head not covered by thorax, exsert. 



A. Antennce short, moniliform, thicker towards the extremity. 



Sub-genera: Prasocuris LATE. (Helodes PAYK., FABR,), Phcedon 

 MEGERLE, Chrysomela L. (in part), Timarcha MEG. (apterous species), 

 Paropsis OLIV., Doryphora ILLIG., Trochalonota WESTW., Phyllo- 

 charis DALM., &c. 



Comp. HERRICH-SCH.EFFER, Auseinandersetzung der Gattung Chrysomela, 

 Deutschl. Ins. Heft 157. 



Sp. Chrysomela Phellandrii L., Helodes phellandrii PAYK., FABR., DUMERIL, 

 Cons., gen. s. I. Ins. PI. 19, fig: 4, PANZER, Deutschl. Ins. Heft 83, Tab. 9 ; 

 Chrysomela populi L., PANZER, Deutschl. Ins. Heft 100, Tab. 5, RATZE- 

 BURG, Forst-Ins. I. Tab. xx. fig. 4; Ouvrage posth. de P. LYONET, PI. 12, 

 figs. 36 42 ; this little beetle, 5'" long, is blue-black, with red-brown or 

 orange-coloured shield- covers, which have a black spot at the point; the 

 larvse eat the parenchyme of the leaves of poplars, so that the vascular net 

 is left like a skeleton leaf; see RATZEBURG, 1. 1. Tab. xxi. fig. 6; Chryso- 

 mela fastuosa L., PANZER, Deutschl. Ins. Heft 44, Tab. 12, &c. 



B. Antennce filiform, longer than half the body. 

 Sub-genera : Podontia DALM., Colaspis FABR. 



Note. DE LA PORTE, Mem. sur les divisions du genre Colaspis, Revue 

 entomol. par SILBERMANN, pp. 18 25, proposed several sub-genera. 



Does genus Megamerus MAC LEAY belong here ? Habitus of Prionus, 

 thorax oblongo-quadrate. Comp. BOISDUVAL in GUERIN, Magas. de Zool. 

 1835, Ins. PI. 124. 



Cryptocephalus GEOFFR. (in part), FABR. Head vertical, almost 

 ntirely intruded within the gibbous thorax. 



