142 INSECTA. 
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 vegetable mat- 
ters; some inhabit certain ant-hills. 
Those which have eleven joints in the antennee form the genus 
Psevarnus, Herbst.—Starayiinus, Lin.—Anruicus, Fab. 
In some few the tarsi are furnished with hooks. 
CaeEnnium, Lat. 
Where the ten first joints of the antenne are almost equal and 
lenticular, and the eleventh or last is larger and nearly globular. 
The palpi do not project *. 
Diontx, Dej. 
Where the third joint of the antenne 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 fF. 
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 elon- 
gated, narrowed at base, and terminated in a club. 
Sometimes the antennee, evidently longer than the head and tho- 
rax, terminate in a club formed by the three last joints, which are 
manifestly larger than the preceding ones, the last being almost ovoid 
or ovoido-conical. 
Psevapuus, proper.—Psr.apnus, Herbst t. 
Sometimes the ninth and tenth joints of the antenne, the length of 
which, at most, is equal to that of the head and thorax, are hardly 
larger than the preceding ones; the eleventh or last is alone much 
thicker, nearly spherical, and with an acicular point at the end. 
Biruynus, Leach. 
Where the second joint of the antenne is much thicker than the 
first, and dilated on the inner side in the manner of a tooth §. 
* Lat., Gener. Crust. et Insect. III, p. 77; a nie specics—bDituberculatum— 
extremely well figured in the atlas of the Dict. des Se. Nat. 
+ In this family, two of the palpi at least are tag terminated. For this genus, 
see MM. Lepeletier and Serville, Encyc. Méthod., Entom., X, p. 221. 
t The Pselaphii Herbstii, Hiesii, longicollis, dresdensis, &e. of Reichenbach or his 
first family of this genus; the thorax is elongated. 
§ Ps. securiger, Ejusd. See Leach, Zool. Miscell., III, page 80, 82, 83. 
