COLEOPTERA. 569 



and all the joints of the tarsi are entire ; the first, much shorter 

 than the following ones, is scarcely visible at the first glance, 

 and the last is most commonly terminated by a simple hook. 



They are found on the ground under the debris of vegeta- 

 ble matters ; some inhabit certain ant-hills. 



Those which have eleven joints in the antennae form the 

 genus 



Pselaphus, KevbsLStaphylinus, lAn.Anthicus, Fab. 



In some few the tarsi are furnished with hooks. 



Chennium, Lat. 



Where the ten first joints of the antennae are almost equal and 

 lenticular, and the eleventh or last is larger and nearly globular. 

 The palpi do not project(l). 



Dionix, Dej. 



Where the third joint of the antennae and the four following ones 

 are very small, transversal and granose; the eighth and three follow- 

 ing ones are thicker than those which precede them, cylindrical, and 

 as long as the first seven taken together; the two penultimates are 

 conical and equal; the last is ovoid, elongated, pointed, and the 

 thickest of all. The maxillary palpi are very salient but shorter 

 than the head and thorax united and consist of four cylindrical 

 joints. The labials are short, directed forwards, and consist of 

 three joints with a point at the end(2). 



The others have but a single hook at the extremity of the tarsi. 



Here, the maxillary palpi, flexed or geniculated, are at least as 

 long as the head and thorax; their second and fourth joint are much 

 elongated, narrowed at base, and terminated in a club. 



Sometimes the antennae, evidently longer than the head and thorax, 

 terminate in a club formed by the three last joints, which are mani- 

 festly larger than the preceding ones, the last being almost ovoid or 

 ovoido-conical. 



Pselaphus proper. Pselaphus, Herbst.(3) 



(1) Lat., Gener. Crust, et Insect. Ill, p. 77; a single species bituberculatum 

 extremely well figured in the atlas of the Diet, des Sc. Nat. 



(2) In this family, two of the palpi at least, are thus terminated. For this ge- 

 nus, see MM. Lepeletier and Serville, Encyc. Method., Entom.,X, p. 221. 



(3) The Pselaphii Herbstii, Hiesii, longicollis, dresdensis, &c. of Reichenbach 

 or his first family of this genus; the thorax is elongated. 



Vol. III. 3 W 



