418 
INSECTA. 
Zyrophorus, Dalm. — Leptochirus, Germ. — Iren^us, Leach , — 
OxYTELUs, Oliv. — PiESTus, Gruv. 
The body depressed; anterior legs only, wider than the rest, den- 
tated exteriorly ; head transverse ; thorax square ; antennae equal 
throughout, at least as long as the head and thorax, and composed 
mostly of oval or cylindrical joints rounded at both ends ; mandibles 
as long as the head, and dentated at the extremity * * * § . 
Prognatha, Laf. Blond. — Siagonum, Kirby. 
The Pi'ognathae scarcely differ from the Zyrophori except in their 
filiform antennae, composed of elongated joints f. 
CoPROPHiLus, Lat. — Omalium, Grav. Oliv. Gyll. 
The body still flattened, but all the tibiae dentated or spinous ex- 
teriorly ; antennae much longer than the head, granose, insensibly 
enlarging towards the end ; mandibles almost lunate, arcuated exte- 
riorly, not sensibly dentated, and their extremity but slightly pro- 
longed J. 
In the fourth section, that of the Depressa, Ave find a free head, 
an entire labrum, and short maxillary palpi of four distinct joints ; 
but the tibiae are simple, or Avitbout teeth or spines exteriorly, and 
the tarsi evidently consist of five joints. 
Here the palpi are filiform. 
Omalium, Grav. 
The thorax as Avide as the elytra, Avider than the head, and almost 
forming a transverse square ; the angles, or at least those before, 
rounded, and frequently Avith a raised lateral margin ; the antennae 
enlarging tOAvards their extremity §. 
Lesteva, Lat. — Anthophagus, Grav. 
Thorax cordiform, narroAved, and truncated posteriorly, almost 
isometrical, as Avide as the head, and narroAver than the elytra ; the 
antennae usually filiform, Avith elongated joints 1|. 
There the palpi are subulate. 
Micropeplus, Lat. 
Antennae terminating in a solid club, and lodged in fossulae of the 
thorax 
* See Dalman, Anal. Entom. p. 23 ; liis Z. fronticornis, IV, f. 1, appears to be 
the Oxytelus bicornis, Oliv., Encyc. Method. The one he calls penicillatus, Ib. f. 2, 
appears to be closely allied to the Piestus sulcatus, Gravenhorst. The Leptochirus 
scoriaceus, Germ., Insect. Spec. Nov. I, 1, is a very distinct species. 
t Siagonum quadricorne, Kirby and Spence, Introd. to Entom. I, 1,5; Blondel, 
Ann. des Sc. Nat. Avril 1817, XA'II, 14 — 17. 
X Omalium rugosum, Gravenhorst, and other species with short elytra. 
§ See Gravenhorst, Encyc. Method., art. Omalie, and Gyll., Ib., p. 19S. 
II See Latr., Gener. Crust, et Insect., I, 296, 297 ; Gravenhorst and Gyllenhal 
genus Anthophagus, 
^ See Lat. Gener. Crust, et Insect., IV, 377 ; Omalium porcatum, Gyll., Insect. 
Suec., I, pars II, p. 211 ; Micropeplus porcatus, Charp., Horee Entom., VIII, 9; — 
0, staphylinoides, Gyll., Ib. p. 213. 
