154 THE ORDER OF COLEOPTERA. 



The Cerambycini comprise many genera and species, but the three 

 principal genera east of the Eocky Mountains are Chion, Newman, and 

 Ehuria and UlapMdion, Serville. Chion contains only the cinctus, Drury, 

 and the garganieus, Fab., which are now regarded as one species. It is 

 nearly an inch long, of a grayish-brown color, with an irregular oblique 

 yellow band across each elytron, and a sharp spine at the side of the 

 thorax. Its larva inhabits the hickory. The name Ehuria is derived 

 from the Latin ebur — ivory ^ in allusion to the ivory-like callosities on the 

 elytra. We have ten species, the most common of which is the E. quad- 

 rige7ninata, of Say, an elegant fawn-colored beetle more than three-quar- 

 ters of an inch in length, with two double ivory-like spots on each ely- 

 tron. Its larva lives in the honey -locust ( OleditscMa triacanthos, Linn). 

 ElapMdion, (from elaphus — a stag, on account of its long horns or anten- 

 nae) contains thirty-five plain brownish-gray species, which have been 

 distributed in a number of sub-genera. The larvae are the well known 

 twig-pruners of the oak, the maple and other trees. The genus is dis- 

 tinguished by having several of the basal joints of the antenme pro- 

 longed into spines at the tip. 



The Callidiini are also considerably numerous in species, most of 

 which may be included in the genus CaUidium, Fab., a name derived 

 from a Greek word meaning beautiful, many of the species being 

 prettily colored. The genus Hylotrupes, Serv., meaning a wood borer, 

 is distinguished form Callidium by having the antenupe less than half 

 as long as the body, and by having the thorax densely clothed with 

 short whitish hairs. Its type is the H. hajulus, Linn., a dull blackish 

 beetle about two-thirds of an inch in length, which has been imi^orted 

 into this country from Europe. Its larvte are sometimes seriously in- 

 jurious to fir, spruce and hemlock lumber, and they have been known 

 to gnaw through sheets of lead when these come in their waj'. Two 

 beautiful species, one red and the other purple, and both with ivory- 

 like stripes on the elytra, have been set apart in the genus Physocne- 

 mum, of Haldeman, {Bnlarias, Thomson). Callidium proper, (iuclud- 

 ing Phfmatodes) contains twenty N. A. species. 



The Clytini constitute a very numerous group which has been divi- 

 ded into many genera, but most of which might be included in the 

 genus Clytus. This name, usually attributed to Fabricius, is said by 

 M. Mulsant to have been originated by Laichtining, in a work upon 

 Tyrolese insects. It is derived from the Greek Idutos — sonorous, or 

 noisy — having reference to the squeaking noise made by these insects 

 when captured. The sugar-maple borer (Clytus speciosus. Say), the 

 locust borer, (C. robinicv, Forster), and the ash-tree borer ((7. caprecc, 

 Say,) belong to this group, which contains many of our most beautiful 

 species. 



