COLEOPTERA. 
417 
Ev^sthetus, Grav. 
The antennae, also inserted before the eyes, but hardly longer than 
the head, and almost entirely moniliform ; the body but "slightly 
elongated, and the head as wide as the thorax *. 
Stenus, Lat. 
The antennae inserted near the internal margin of the eyes, and. 
terminated in a triarticulated club ; extremity of the mandibles 
forked ; large eyes. 
S. 2-guttatus ; Slaphylinus 2-guttatus, L. ; Panz. Faun, Insect. 
Germ., XI, 18. About two lines in length; all black, with a 
reddish dot on each elytron f. 
The third section — Denticrura, Lat. — differs from the second in 
the maxillary palpi, which are much shorter than the head, and 
always consist of four distinct joints ; the anterior tibiae, at least, are 
dentated or spinous along their exterior side. The last joint of the 
tarsi, which in most of them are bent under tbe tibiae, is as long as 
all the preceding ones together, or longer; the first, or two first, are 
usually so small or so concealed that the whole number does not 
appear to exceed two or three. 
The fore-part of the head, and even the thorax, is armed with 
horns in several males. The antennae are inserted before the eyes. 
Some, whose palpi have a fusiform termination, whose antennae 
are mostly granose and gradually enlarge towards the extremity, 
present but three distinct joints in the tarsi 'j;. 
OxYTELus, Grav. § 
The others have filiform palpi, and at least four very distinct joints 
in the tarsi. 
OsoRius, Leach, Dej. 
The body cylindrical ; all the tibiae widened and dentated ; the head 
as long as it is wide ; thorax almost cordiform, narrowed and trun- 
cated posteriorly ; the greater part of the antennee granose, insensibly 
enlarging towards the extremity, and shorter than the head and 
thorax ; mandibles much shorter than the head, crossing considerably, 
and terminating in a simple point ; mentum large and scutiforjn. 
But a small number of species are known, which are not yet 
described. From Guiana and Brazil. 
* Evcesthetus scaber, Grav. ; Germ., Faun. Insect. Europ. VII, 13 ; Gyll., Ib., p. 
461. A new species has been discovered by M. Blondel, Jun. in the vicinity ofter- 
sailles. 
t Add Staphylmus Juno, Payk. ; — Ptederus prohoscidevs, Oliv., Col. Ill, 44, 1, 5 ; 
—Staph, clavicornis, Panz., Faun. Insect. Germ. XXVII, 2. See Gravenhorst, 
Coleop. Microp. ; Lat., Gener. Crust, et Insect., genus Stenus, and Gyll., Ibid., p. 
+ With the exception of the Tachini, the anterior tarsi are no longer remarkably 
lilated. , ^ . , 
§ See Encyc. Method., article Oxytele ; the Monog. cit..of Gravenhorst, and 
die Insect. Succ., Gyll., I, pars II, p. 444. 
VOL. III. ® ^ 
