EPAGRIUS. 129 
This is the genus which Lacordaire referred to 1, and—speaking of one of its species 
—said that it must be separated from Epicwrus on account of the posterior corbels 
being open. The posterior corbels I consider, however, to be feebly cavernous, and I 
think this difference alone would not be sufficient to substantiate the generic separation 
proposed. I find, however, that the scrobes also are considerably broader in Hpagrius 
than they are in Hpicwrus, and the two characters taken together separate the genera 
fairly well. There is, however, considerable variety in the genus as to each of the 
characters—LHpagrius albosquamosus, for instance, having the cavernous corbels as 
distinctly developed as they are in some Epiceri,—so that the location of some of the 
species in the genus is not quite satisfactory. 
As regards the synonymy it should be remarked that Lacordaire considered 
Graphorhinus to cousist of G. operculatus and G. vadosus, Say; the latter species was, 
however, unknown to him and he drew his characters from the former. Horn has 
since pointed out that these characters do not agree with those of the latter species— 
viz. G. vadosus, Say ; and as this is the type of Graphorhinus, Say, another name must 
be found for the Graphorhinus as known to Lacordaire. Hpagrius having been founded 
by Schonherr on a species—as I believe—of the present genus, the name appears to be 
available, although it was treated by Lacordaire as merely a synonym of Graphorhinus. 
Unfortunately I have not been able to see an example of EH. nubilosus, on which 
Schonherr founded ELpagrius, so that my application of the name may possibly prove 
to be erroneous. | 
For the purposes of determining the species the genus may be considered to consist 
of seven groups, Viz. :— 
1. Obese, comparatively large insects with a more or less definite sulcus along the middle of the 
thorax. Species 1-5. 
2. Smaller insects without groove, but with some punctures placed in front of one another on 
the middle of the thorax. Species 6-8. 
3. Insects of moderate or large size, with a broad impression or deplanation on the middle of the 
thorax. Species 9-15. 
4, An insect of rather large size, without depression or channel on the thorax, but with the 
scutellum distinctly visible at the base of the elytral suture. Species 16. Pais 
5. Quite small insects, squamose, but with the front of the rostrum exhibiting a large, angular, 
glabrous space. Species 17, 18. 
6. Individuals of medium size, with the rostrum broader towards the tip; very coarsely 
sculptured ; scape much clothed. Species 19. 
7. Size very large. Species 20, 21. 
Group 1. 
1. Epagrius operculatus. (Tab. V. fig. 18.) 
Graphorhinus operculatus, Say, Cure. N. Am. p. 9; Complete Writings, i. p. 268. 
Epicerus operculatus, Boh. in Schénh. Gen. Cure. vi. 2, p. 286°. 
BIOL. CENTR.-AMER., Coleopt., Vol. LV. Pt. 3, October 1891. SS 
