ELSIANUS.—ELMIS. 133 
Hab. GuatemaLa, Rio Naranjo 450 feet (Champion). 
So far as I can judge from a single individual, this is a species extremely similar to 
E. robustus, but distinguished by some slight structural differences—the prosternal 
process being less broad, not quite flat, but with an obsolete raised margin, and the 
terminal portion of the mesosternal fossa so much narrower that it forms merely a 
narrow, rather deep, fovea. On the upper surface the only definite distinction to be 
seen is that the thorax is more rounded at the sides, and thus appears to be quite 
distinctly narrowed in front of the hind angles; other slight differences may be merely 
individual peculiarities. 
3. Elsianus graniger. 
Suboblongus, fere angustulus, nigro-fuscus, subopacus, antennis rufis, pedibus rufo-obscuris ; prothorace elon- 
gato, lateribus rotundatis, angulis posterioribus acutis ; elytris fortiter striatis; corpore superne confertim 
granulato. 
Long. 2, lat. vix ? lin. 
Hab. Costa Rica, Cache (Rogers). 
The single specimen before me of this insect, although very similar to L. robustus, is 
undoubtedly a very distinct species, possessing important structural characters of its own. 
It is less parallel in form. The thorax is quite as long as broad; it is much rounded 
at the sides, so that it is a good deal contracted behind; and the hind angles project 
distinctly backwards; the elevated line on the thorax is deep and definite at the base, 
but is altogether wanting in front; the surface is closely granulate ; and there appears 
to be a very small prominence in front of the scutellum. The elytra are narrower at 
the base than they are behind ; they are deeply striate; the strie bear coarse punc- 
tures; and the surface is rendered very rough by dense granulations. The maxillary 
palpi are much shorter than in £. robustus, the terminal joint being broader than long. 
The prosternal process is rather narrow; and the large, elongate, rather narrow meso- 
sternal fossa is remarkably deep and definite through its whole length. 
Although this insect approximates to Heterelmis by the structure of the maxillary 
palpi, yet, by the structure of the mesosternal fossa and prosternal process, it departs 
more widely from that genus than do the other two species of Hisianus. 
ELMIS. 
Elmis, Latreille, Hist. Nat. d. Fourm. p. 396°. 
Limnius, Er. Nat. Ins. Deutsch. iii. p. 522 *. 
This is a genus as to whose limits considerable diversity of opinion prevails. Erich- 
son? separated Limnius on account of a difference in the scutellum and base of the 
thorax and some other slight characters; and Duval separated Lareynia (included in 
Elmis by Erichson) on account of a difference in the maxillary palpi. On the other 
