14 | HETEROMERA. 
finely and sparingly punctured, the punctures more numerous and distinct towards the suture at the base ; 
legs and antenne reddish brown. 
Length 53 millim. 
Hab. Panama, La Caldera in Chiriqui (Champion). 
One example. Of the convex form of the EZ. foveicollis group, but with the thoracic 
fovere obsolete, and represented by short, oblique, shallow impressions; it is nearest 
allied to E. confusus. 
16. Emmenastus guatemalensis. 
Winged, oblong ovate, very convex, dark reddish brown or black, shining. Head coarsely and closely punc- 
tured; prothorax transverse, convex, widest at the base, the sides rounded and narrowed in front to the 
obtuse anterior angles, the hind angles rectangular, coarsely closely and regularly punctured, the 
punctures but little finer towards the middle and scarcely confluent at the sides, base bisinuate; elytra 
with regular rows of coarse punctures distinct to the apex, the interstices somewhat coarsely punctured ; 
antenne and legs dark reddish brown; mandibles toothed above ; intercoxal process slightly rounded 
in front. 
Length 5-6 millim. 
Hab. Guatemata, Zapote, San Gerdnimo, Capetillo, Duefas (Champion), Izabal 
(Sallé). 
Resembling somewhat in its convex form E. foveicollis and allies, but without the 
deep thoracic fovee. 
17. Emmenastus foveicollis. (Tab. I. fig. 11.) 
Winged, oblong ovate, very convex, dark reddish brown or black, shining. Head coarsely but not very closely 
punctured; prothorax very convex, transverse, strongly rounded at the sides, a little narrowed behind to 
the acute hind angles, narrowed in front to the rather obtuse anterior angles, base bisinuate and the margin 
raised and with a deep triangular fovea on each side about the middle, the fovee sharply and abruptly 
defined outwardly, more or less connected inwardly by a central transverse basal impression, closely 
coarsely and unequally punctured, the punctures somewhat confluent at the sides, scattered on the disc, the 
central part of the base between the fovex very sparingly punctured and almost smooth; elytra about the 
width of the thorax at the base, rounded somewhat at the sides, very convex, with rows of coarse punc- 
tures distinct to the apex, interstices finely and confusedly punctured; legs and antenne red; intercoxal 
process pointed in front; mandibles toothed above. 
Length 53-63 millim. 
Hab. GuaTEMALA, near the city, Aceytuno (Salvin), Panajachel, Duefias, San Gerénimo, 
Capetillo (Champion); Nicaragua, Granada (Sallé) ; Costa Rica, Irazu (Rogers). 
Of a different facies from the preceding species, from all of which it may be at once 
known by its convex form and deep thoracic fovee. The single example from Nicaragua 
differs a little from the numerous individuals from Guatemala in having the thorax a 
little smoother and longer, the elytra a little broader and a little more rounded at the 
sides, and the interstices more finely punctured. The specimen from Costa Rica is 
more typical, but with the rows of elytral punctures coarser. This species is rather 
