112 ORDER COLEOPTERA. 



carried down the pipe again. The corn weevil is named Sitophilus oryzm from having been 

 first discovered in rie.-. a vegetable which it seems to have accompanied to distant portions 

 of the globe. Infested grain may be detected by its loss of weight, which renders it easj 

 to separate and boil or mind a< feed upon the farm. Mills and bam- sometimes swarm with 

 these insects; and in this case multitudes may be collected and destroyed by sweeping 

 them from the posts, walls and floors. 



' Phyllobius taniatus may be taken as an example of a leaf-inhabiting rhyncophorous 

 insect. Schosnherh, the great authority upon these insects, removes it into a new genus of 

 which it is the only representative. It is found npon the haves of the Antma triloba, or 

 papaw, and is perfectly harmless.' 



Scolytidae. 



Tin: Scolytid.f. are small obscure insects, inhabiting wood : they have a short rostrum ; 

 the head is globular, and is concealed in the thorax; the body is oblong or cylindric : 

 their colors are dull. Among these destructive wood-eaters is the 



Genus HYLURGUS ( Lat.). 



Body cylindrical, obtuse before and behind : head concealed in the thorax ; antennae 

 terminated in a clubform mass, consisting of three or four joints : the tibiae are armed 

 with a tooth. 



Etlokgus terebrans (Oliv.). 

 Pubescent : head rounded, and sunk in the thorax ; antennae :-hort. 



Genus TOMICUS (Lat.). Bostrichus (Erichs.). 



Funiculus five-jointed ; club four-jointed, tunicate ; labium triangular. 



Of this genus, several species have been described by Mr. Say and Dr. Harris. They 

 are small brownish beetles, with the elytra toothed at their apices, appearing as if a piece 

 was bitten out. 



TOMICUS EXESUS. 



Color dark chestnut brown, and somewhat hairy : thorax ovate, rough before; elytra 

 strongly punctured in rows; apices excavated, the edges t<«. .t}i«<I on the outer side. 

 Length between one-fourth and one-fifth of an inch. 

 This small and obscure inject is found under the bark of the pitch pine tree, where it 

 excavates numerou* zigzag and parallel roads. It greatly injures forests in thi* way ; cut- 

 ting off the circulation of the sap, which ultimately cans - the bark to become loosened, 

 when the tree dies. 



