130 PARNIDA. 
utrinque linea elevata; elytris fortiter punctatis, versusque latera lineis duabus elevatis, interstitio secundo 
ad basin elevato. 
Long. 12, lat. 2 lin. 
Hab. Guatemata, Rio Naranjo, 450 feet (Champion). 
Antenne short, the two basal joints obscure red, the rest black; the four apical 
joints distinctly incrassate. Thorax longer than broad, a good deal narrower than the 
elytra; its greatest breadth about two thirds of the length from the front, behind this 
slightly narrowed to the base, and also slightly narrowed towards the front ; the surface 
closely granulate-punctate, with a channel along the middle which is very deep on the 
disk, but does not extend to the front margin; at the base on each side of this channel is 
a short longitudinal impression, while near the side there is a raised line extending the 
whole length, though indistinct at the front margin. LElytra with series of very large 
punctures, and with the second interstice at the base elevated; the fourth and sixth 
interstices provided each with a raised line not extending to the apex. Legs elongate ; 
metasternum granulate. 
Only a single specimen has been obtained of this species; it has the basal ventral 
segment very deeply impressed, and the apical segment not emarginate at the hind 
margin. 
HETERELMIS. 
Genus quoad faciem Elmidi Europeo persimile. Palpi maxillares articulo ultimo dilatato, haud longiore 
quam latiore, apice truncato. Prosterni processus apice truncato lato. Mesosterni fossula lata, haud 
profunda, lateribus omnino parallelis. 
The obscure insects forming this genus are excessively similar to the European Eimis ; 
but they do not agree with them in the structure of the maxillary palpi, nor in that of 
the mesosternum, and must be isolated from all the forms included in Elmis by 
Erichson and recently separated into several genera by Mulsant and Rey. The species 
of Heterelmis possess two fine elevated crenate lines on the wing-cases parallel to the 
outer margin, and also an elevated line on each side of the thorax; the lateral margin 
of the thorax is very sharply defined and rather obscurely crenate. The maxillary 
palpi are so distinct in their structure as to be of themselves sufficient to validate the 
genus: they are very short, so that they do not extend beyond the lobes of the maxille ; 
the basal joint, as usual, is minute and concealed; the second joint, slender at the base, 
is very short, but becomes abruptly broader so as to be transverse at the apex; the 
third joint is very short and strongly transverse ; the fourth broad, subquadrate, but 
distinctly longer outwardly than at its inner margin. 
1. Heterelmis obscurus. 
Niger, subopacus, antennis rufis, pedibus piceis; prothorace elytris angustiore, dorso in medio sulculo trans- 
verso impresso ; elytris seriatim punctatis. . 
Long. 1, lat. $ lin. 
Hab. GuatTEMALA, Guatemala city 5000 feet, San Joaquin in Vera Paz (Champion). 
