154 
THE ORDER OF COLEOPTERA. 
Y>'- 
Tbe Cerambycini comprise many genera and species, but the three 
principal genera east of the Rocky Mountains are Chion , Newman, and 
Eburia and Elwphidion, Serville. Chion contains only the einctus, Drury, 
and the garganicu 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 Eburia 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- 
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 ( Oleditschia triacantlios , Linn). 
Elaphidion, (from elaphus—a stag , on account of its long horns or anten- 
nae) contains thirty-live plain brownish-gray species, which have been 
distributed in a number of sub-genera. The larvae are the well known 
twig-pruuers of the oak, the maple and other trees. The genus is dis- 
tinguished by having several of the basal joints ol the antennae pro- 
longed into spines at the tip. 
The Callidiini are also considerably numerous in species, most of 
which may be included in the genus Callidium , Fab., a name derived 
from a Greek word meaning beautiful, many of the species being 
prettily colored. The genus Eylotrupes, Serv., meaning a icood borer , 
is distinguished form Callidium by having the antennae less than halt 
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 larvae 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 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 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. Mulsaut to have been originated by Laichtiniug, in a work upon 
Tyrolese insects. It is derived from the Greek lclutos — sonorous , ol 
noisy — having reference to the squeaking noise made by these insects 
when captured. The sugar-maple borer ( Clytus speciosus, Say), the 
locust borer, ( C. raibiniw , Forster), and the ash- tree borer ( C. caprece, 
Say,) belong to this group, which contains many of our most beautitul 
species. 
