136 INSECTA. 



tremity. The last joint of the posterior tarsi of the Octogonotes is 

 abruptly inflated and rounded above, or ampuUaceous, with the two 

 terminal hooks inferior and small. 



CEdionychis, Lat., 



Is distinguished by this last character from the following subgenera. 

 To this subgenus we refer the two first families of Illiger's Mono- 

 graph. 



But a single species is found in Europe — the A. marginella, 



Oliv., Col., VI, 93, his, ii, 34 — and even that is confined to Spain 



and Portugal*. 



In the remaining subgenera the last joint of the tarsi is elongated 

 and gradually thickened, with the two hooks, of the ordinary size, 

 situated as usual at its extremity, and in a longitudinal direction. 



PSYLLIODES, Lat. 



Where the first joint of the posterior tarsi is very long and inserted 

 above the posterior extremity of the tibiae; this extremity is pro- 

 longed in the manner of a conical, compressed, and hollow appen- 

 dage, somewhat dentated along its edges, and terminated by a small 

 tooth f. 



DiBOLiA, Lat. — olim Altitarsus. 



Where the greater part of the head is sunk in the thorax, and the 

 posterior tibiae are| terminated by a forked spine J. In Altica proper, 

 or 



Altica, Lat.^ 



The head is salient, and the posterior tibiae are truncated at their ex- 

 tremity, 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. oleracea; Chrysomela oleracea, L.; Oliv., Col, VI, 93, bis, 

 iv, 66, About two lines in length :^^ al, elongated; green or 

 bluish; a transverse impression on tiie thorax; elytra finely 

 punctured. On vegetables. It is the largest of the European 

 species. 



A. nitidula; Chrysomela iiitidula, L.; Oliv,, lb., V, 80. 

 Green; head and thorax golden; legs fulvous. On the Willow §. 



* Add the A. hicolor, thoracica, cincta, alhicoUis, lunafa, and some other species of 

 Olivier. 



t The ninth family, or the Altitarsi, Illig., comprising the following species of 

 Gyllenhall: chrysocephala, napi, hyosciami, dulcamara, affinis. 



Those which he calls dentipes, aridella, and some others in which the posterior 

 tibiae are dilated near the middle of their posterior side, in the form of a tooth, with 

 a canal beneath, longitudinal and ciliated along the edges, might constitute a separate 

 subgenus. 



X The eighth family, the A. Echii, Oliv,, and the A. occultans, Gyll. 



§ The 3, 4, 5, 6, families of the same. 



