﻿joint of the antenna? is longer than tlie 3rd ; an error into 

 which lie was probably led by his having examined Pentatoma 

 Oleracca, which he gave as the type of the genus Cjjdnus, but 

 which in reality belongs to the 3rd division (C.) o{ Pentatoma 

 (vide folio 20). Tlie relative proportions of the joints of the 

 anternia?]are most important characters here ; and it so happens 

 that the 2nd joint is never longer, but generally shorter than 

 the 3rd ; and it is not so in Pentatoma^ as will be seen by re- 

 ferring to plate 20, except in division A, which comes nearest 

 to Cijdnus in this respect ; and there it arises from the 3rd joint 

 being the longest of all, which is not the case in Ci/dnus : the 

 absence of the notch in the anterior tibiae, and all the legs 

 being spined, are other very essential characters. 



There are 7 or 8 British species of this genus: viz. 1. C. f)i- 

 color L. ; 2. viorio L ; 3. marginatus ? 4. biguttatiis L. ; 

 5. albo-marghiatus F. ; 6. diibius Scop. ; and a species in the 

 cabinet of Mr. Stephens, larger than C. morio, but closely 

 allied to it. The habits of these insects are like those of the 

 kindred genera : several of the species are common. They are 

 found upon plants in June, and frequently are to be seen in 

 gravel-pits, into which they have accidentally fallen. Of the 

 species figured I have seen but 2 specimens ; one in the British' 

 JVIuseum, from w hich the drawing was made, the t)thcr (which 

 is of a duller colour) is in Mr. Stephens's cabinet. 



Fabricius in his synonyms lo Cj/dtnis niorio, includes figure 

 1 1 of the 57th table of Schaeffer's Iconcs, which is a blue in- 

 sect with a pale margin, whereas, to agree with his description 

 it ought to be entirely black, with the exception of tlie rufous 

 tarsi. There can be little doubt but this figure represents the 

 C. duhius of Scopoli, and as such it is named by Panzer in his 

 Sj/stt'/natic Nomenclature of Scha^ft'cr's Icones, page 75. 



The plant figured is Arabis turrita (Tower Wall-cress), 

 communicated by Professor Henslow, from the walls of 

 Trinitv and St. John's Collcjxes, Cambridije. 



