232 CATALOGUE OF THE INSECTS OF 



the intervening spacOj a pair of tubercles on each side. In the 

 triangular depression above the excavation, there is an additional 

 pair of tubercles, above and within the decurved teeth. 



This is evidently the Bostrichus hiclens, of Gyllenhal, as appears 

 from his description (Ins. Suec, iii., 357, iv., 623J; but it is 

 distinct from a closely allied insect, found by the Rev. J. F. 

 Dawson, in the twigs of Clematis vitalba, in the Isle of "Wight, 

 which Chevrolat regards as the true 2\ bidens. 



The latter differs in the greater breadth of the retuse impression, 

 in the straight short teeth at the apex, and in the thorax in front 

 not being scabrous. If not already named, it may be designated 

 T. Clematidis. 



Stirps 2. EUCERATA, Wesiw. 



Family 1. CERAMBYCID^, Leach. 



Sub-family 1. CERAMBYCIDES, West. 



312. Callidium, Fah. 

 1. 0. Alni, Linn. 



Steph. Illust., Maud., iv., 249. — Mulsant, Col. de France, 

 Long., 45. 

 "Gibside."— (?. Wailes, Esq. 



313. Clytus, Fah. 



1. 0. Arietis, Linn. 



Stej^h. Illust, Mand., iv., 243. — Mulsant, Col. de France, 

 Long., 81. 

 Common, in the Newcastle district. " Twizell." — P. J. Selby, 

 Esq. 



2. 0. arcuattjs, Li7in. 



Ste2^h. Illust., Mand., iv., 243. — Platynotus arcuatus, 

 Mulsant, Col. de France, Long., 73. 

 A specimen of this insect was caught by a boy, in a wood, 

 between Bill Quay and Hebburn Quay, and brought to Mr. John 

 Thornhill, schoolmaster, Bill Quay. 



