HETERELMIS.—ELSIANUS. 131 
This species is readily distinguished from its congeners by the deep transverse furrow 
placed just on the middle of the length of the thorax, between its two elevated 
lines. The punctures forming the series on the elytra are not very distinct, and have 
but little appearance of being connected so as to form strie ; the pubescence is scanty ; 
the basal ventral segment is rather closely punctate in the middle; but the following 
segments are almost impunctate ; the transverse carina between meso- and metasternum 
is very strongly elevated. The legs are more elongate than in the allies of the species. 
2. Heterelmis obesus. (Tab. IV. fig. 10.) 
Latus, niger, opacus, antennis rufis, pedibus nigro-piceis, tarsis rufis ; prothorace elytris angustiore, dorso in 
medio vix transversim depresso ; elytris seriatim punctatis. 
a 9 Wi 
Long. 14, lat. =% lin. 
Hab. Guatemata, San Joaquin in Vera Paz (Champion). 
An insect of short broad form. The thorax is much narrowed towards the front, 
and is dull, closely but very indistinctly punctate; external to the raised lines there are 
fine granules, and across the middle there is an obsolete transverse impression. The 
punctures on the elytra are quite distinct at the base, but much more obsolete at the 
apex, and they give rise to a slight appearance of striation. The basal and following 
ventral segments are rather finely punctate along the middle. 
Although very closely allied to H. obscurus, this is apparently constantly distinct : 
the form is broader, the antenne longer, the legs shorter, the thorax with only indefinite 
impression across the middle; the extremity of the prosternal process is broader, and 
the middle of the metasternum and ventral segments more punctate. 
3. Heterelmis simplex. | 
Brevis, niger, subopacus, antennis pedibusque rufis; prothorace elytris angustiore, quali; elytris seriatim 
punctatis. 
Long. {, lat. 3 lin. 
Hab. Guatemaua, Cahabon (Champion). 
Thorax only very indistinctly and sparingly punctured and pubescent, a little shining. 
Elytra with series of fine punctures, and at the extreme base appearing a little striate. 
Middle of metasternum and ventral segments almost impunctate along the middle. 
Extremely closely allied to H. obscurus and obesus, but differing from the former by 
the absence of the prothoracic groove, by its more feeble legs and its shorter form ; 
while from HH. obesus the smaller size and the less punctate under surface readily 
separate it. Ihave seen only three individuals, one of which has the legs pitchy red. 
ELSIANUS. 
Corpus robustum, suboblongum. Palpi maxillares articulo ultimo dilatato. Prosterni processus apice rotun- 
dato. Mesosterni fossula fere ad metasternum prolongata. Scutellum latum, suborbiculatum. 
SS 2 
