COLEOPTERA. 513 



der, their first joint being much elongated. The two posterior legs 

 are placed very far back(l). 



The others have large and very apparent palp'i of unequal lengths. 

 Their body is depressed and narrowed before; their antennae some- 

 times 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, Lin. Fab. 



Those in which the antennae consist of but two joints, with the 

 last large and compressed, form the subgenus 



Paussus proper. 



A species P. bucephalus, Schoenh., Synon. Insect., I, 3, App. 

 VI, 2 in which the head resembles two simple eyes; where the 

 eyes are small and but slightly prominent, and where the an- 

 tennae, hardly longer than the head, are laid on its anterior face, 

 and terminated in an acuminated joint, constitutes the genus 

 Hylotorus of Dalman Anal. Entom., p. 102(2). 

 Those in which the antennae consist of ten entirely perfoliate joints 

 form the subgenus 



Cerapterus, Swed.(3) 



2. A second section will comprise those Xylophagi, whose an- 

 tennse consist of but ten joints, and in which the palpi, at 

 least those of the maxillae, do. not gradually taper to a point, 

 but are of equal thickness throughout, or dilated at the ex- 

 tremity. 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 



(1) Ibid., p. 277- M. Dalman has figured a species -Jlavicornis?, Fab. en- 

 closed in amber. 



(2) See Lat, Gener. Crust, et Insect., Ill, p. 1, and Schoenherr, Synon. Insect, 

 I, 3, App. vi, 1. 



(3) Lat., Gener. Crust, et Insect., Ill, p. 4. 



Vol. III. 3 P 



