96 



Platypus, Herbst. — Bostrichus, Fab. 



The antennae, shorter than the head, fold under the eyes and ter- . 

 minate in a very large club without distinct annuli. The body is li- 

 near, and the head cut vertically before ; the eyes are almost round 

 and entire. The thorax is emarginaterl on each side to receive a por- 

 tion of the anterior thighs ; the two anterior tibia; are divided on tlicir 

 posterior face by transverse ridges ; the tarsi are long and very slen- 

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

 are placed very far back *. 



The others have large and very apparent palpi of vmequal 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, Schosnh., Synon. Insect., I, 3, App. 

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

 the eyes are small and bvit 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 f. 

 Those in which the antennae consist of ten entirely perfoliate joints 

 form the subgenus 



Cerapterus, Swed. J 

 2. A second section will comprise those Xylophagi, whose antennae 

 consist of but ten joints, and in Avhich the palpi, at least those of the 

 maxillse, 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 perfo- 

 liate club in the first, or 



* Lat., Gener, Crust, et lusect. II, p. 277. M. Dalman bas figured a species — 

 fiaricornis ? , Fab. — enclosed in amber. 



t See Lat., Gener. Crust, et Insect., Ill, p. 1, and Schoenherr, Synon. Insect. I, 

 3, App. vi, 1. 



+ Lat., Gener. Crust, et Insect., Ill, p. 4. 



