of Trachodes and Acalyptus. 205 



T. C. Heysham, Esq., picked up a specimen eight years ago, 

 of this remarkable and interesting insect, not far from Carlisle, 

 which he kindly forwarded to me for my examination ; since 

 which another has been captured by Mr. W. Walker from the 

 trunk of an oak in the New Forest, in May 1850; these I believe 

 are all the specimens known to have been found in England. 



Genus Acalyptus, Schonh. 



Char. Gen. "Antenna? moderate, rather slender; funiculus 

 seven-jointed; the two basal joints elongate, obconic, the first 

 longer and stouter than the second, the remainder very short, 

 truncate at their apices, coarctate, gradually increasing in 

 breadth ; club oval. Rostrum elongate, slender, linear, curved. 

 Eyes lateral, rounded and slightly convex. Thorax bisinuated at 

 the base, narrowed in front, a little rounded at the sides, and 

 truncate at the apex. Elytra quadrate-ovate, rather convex above, 

 regularly rounded at the apex ; pygidium exposed." 



Obs. This genus greatly resembles Tychius in its general habit, 

 from which it chiefly differs in the structure of the terminal joints 

 of the funiculus of the antenna?, in its linear slender rostrum, 

 subdepressed body, and its sericeous piliform scales. 



Acalyptus Carpini, Hbst, Gyll., Schonh. 



— sericeus var. y, Schonh. Supp. 



— rvfpennis var., SchSnh. 



Black, subdepressed, covered with shining silvery-white scales. 

 Head small, suborbiculate, depressed, black, very finely punc- 

 tured ; eyes rotundate, brown, a little prominent ; rostrum rather 

 longer than the head and thorax, linear, curved, black, subopake, 

 and very minutely punctured throughout. Antennas rather short, 

 slender, entirely pale testaceous ; sometimes with the club ob- 

 scure. Thorax scarcely broader than long, much narrowed in 

 front, very little rounded at the sides, slightly bisinuated at the 

 base, nearly flat above, black and closely punctulated ; densely 

 clothed with decumbent, piliform, shining, sericeous or silvery- 

 white scales. Scutellum small, round, sericeous. Elytra much 

 broader anteriorly than the base of the thorax, more than three 

 times the length, the shoulders elevated, with the sides straight, 

 each elytron regularly rounded at the apex, nearly plane above, 

 black, piceous or testaceous, subremotely punctate-striate, the 

 interstices flat, coriaceous ; densely covered with scales similar to 

 those of the thorax. Body black, punctulated beneath ; the py- 

 gidium exposed ; the breast densely, and the abdomen sparingly, 

 squamous. Legs moderate, sparingly pubescent ; femora robust 

 in the middle, rufo-ferruginous, or totally pale testaceous ; eden- 

 . tate. Length 1-1 3 line. 



