154 THE ORDER OF COLEOPTERA. 



The Cerambycini comprise many genera and species, but the three 

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

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

 and the garganicus, 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 Uhuria is derived 

 from the Latin ehur — ivory, in allusion to the ivory-like callosities on the 

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

 rigeminata, 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 fOleditschia triacanthos, Linn). 

 Elaphidion, (from elapMis — a stag, on account of its long horns or anten- 

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

 distributed in a number of sub-genera. The larvte 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 antennae pro- 

 longed into spines at the tip. 



The Oallidiini are also considerably numerous in species, most of 

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

 from a (xreek word meaning beautiful, many of the species being 

 prettily colored. The genus Rylotrupes, Serv., meaning a icood borer, 

 is distinguished form Callidium by having the antennse less than half 

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

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

 beetle about two-thirds of an inch in length, which has been imported 

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

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

 to gnaw through sheets of lead when these come in their way. 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, {Dularias, Thomson). Callidium proper, (includ- 

 ing Phymatodes) contains twenty K 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 ^lutos — 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. rohinim, Forster), and the ash-tree borer ((7. caprece. 

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

 species. 



