382 IN SECT A. 



The others have large and very apparent palpi of unequal lengths. Their 

 body is depressed and narrowed before; their antenna; sometimes consist of 

 two joints, the last of which is very large, flattened, and almost triangular, or 

 nearly ovoid, and sometimes of ten, and are entirely perfoliate. 



The labium is large ; the elytra are truncated, and tarsi short, with all the 

 joints entire. These insects are all foreign to Europe, and compose the genus 



PAUSSUS, Linnaeus, 



Where the antennae consist of but two joints, with the last large and com- 

 pressed. 



2. A second section will comprise those Xylophagi whose antenna* consist of 

 but ten joints, and in which the palpi, at least those of the maxilla 1 , do not 

 gradually taper to a point, but are of equal thickness throughout, or dilated at 

 the extremity. The joints of their tarsi are always entire. 



We will divide them into principal genera, according to the mode in which 

 the antennae terminate. The three last joints form a perfoliate club in the 

 first, or 



BOSTRICHUS. 



In Bostrichus proper, the body is more or less cylindrical, the head rounded, 

 almost globular, and capable of being received into the thorax as far as the 

 eyes ; the thorax is more or less convex before, and forms a sort of hood ; the 

 two first joints of the tarsi, as well as the last, are elongated. 



B. capucinus. Five lines in length, with a red abdomen and elytra of the 

 same colour. Very common in old wood in timber yards. 



The second genus of this division, or 



MONOTAMA, 



Is distinguished from the first by the solid and globuliform club the tenth 

 joint of the antenna. 



The body is elongated, depressed, and frequently forms a parallelepiped ; 

 the anterior part of the head is narrowed, and projects somewhat in the manner 

 of a triangular and obtuse snout. The palpi are very small, and, as well as 

 the mandibles, not salient. 



3. The Xylophagi of the third division have eleven very distinct joints in 

 the antennae; their palpi are filiform, or thicker at the extremity in some, 

 and smaller in others ; all the joints of the tarsi are entire. 



Those in which the club of the antennse consists of but two joints form the 

 genus 



LYCTUS. 



In Lyctus proper the margin of the head covers the whole or greater part 

 of the first joint of the antennae. The mandibles are not salient. 



In the other Xylophagi with antennae composed of eleven joints, the three 

 or four last form the club, or the last is alone larger than the preceding ones. 

 They are subdivided thus : 



