Royal Physical Society. 89 



" Qblongus, nigro-piceus ; thorace nigro-piceo, ante medium vix 

 latiore, angulis posticis obtusiusculis ; elytris substriatis, piceis 

 seu castaneis. 



" Long. 21 lin. 



" Mas, trochanteribus posticis acuminatis seu latere inferiore 

 dente magis minusve curvato extante. 



"This is readily distinguished from the C. angustatus, Fab., 

 by the darker colour and the form of the thorax. The antennae 

 are nearly as long as the body*, reddish brown, always darker 

 towards the point. First joint strong, third distinctly longer 

 than the contiguous joints, the fourth somewhat shorter than the 

 third ; fifth, sixth and seventh equal in length, eighth nearly half 

 as long as the seventh, ninth somewhat shorter than the seventh, 

 tenth somewhat shorter than the ninth; the last joint almost 

 twice as long as the preceding, sharply acuminate. The head is 

 black-brown, extremely finely and closely punctate. The thorax 

 is formed like that of C. angustatus, Fab., but the sides both 

 before and behind are nearly equally strongly rounded, so that 

 the greatest breadth is not before the middle ; the margin is by 

 far less raised up, less broadly spread out, so that the line on 

 each side of the thorax is both shorter and less deeply marked; 

 the upper side is as a rule entirely pitchy black, extremely deeply and 

 finely {fine-shagreen) punctured ; the deep middle line is frequently 

 wanting. The elytra are moderately arched, lightly striated, pitchy 

 black, more rarely pitchy brown. The legs are ferruginous brown. 



u It is spread over the whole of middle and southern Europe, 

 and not rare. In France (according to Latreille) ; in Lombardy 

 (according to Villa) ; in Italy (according to Sturm) ; in Sardinia 

 (Gene, Berlin Mus.) ; in Sicily (Berlin Mus.)."t 



A consideration of the differences here given as characterizing 

 these three species will not, I think, warrant us in looking upon 

 them as more than varieties. 



The differences consist in the form and colour of the thorax, 

 the punctuation of the thorax and elytra, the form and colour of 

 the body, the colour of the antennse, the proportions of the 

 joints of the antennse, and the form of the posterior trochanters. 



Of these, the difference most readily recognizable is that in the 

 form and colour of the thorax ; the form of the thorax in the 

 typical specimens of C. castaneus, Sturm, being that shown in 

 fig. 1, while C. angustatus, Fab., is that shown in fig. 2, and 

 C. intermedius, Kr., somewhat between them, but nearest to 



* This is not correctly expressed. The antennse are longer than the half 

 of the body, but cannot be said to be " nearly as long as the body." They 

 are in no degree longer than the antennse of the other varieties. 



f Kraatz in loc. cit. 



