PYCNOMERUS.—ACROPIS. AT5 
elevation. Thorax slightly longer than broad, a little narrowed behind; front angles 
not in the least prominent, but rather obtuse ; the surface shining, coarsely punctate, 
the disc largely but vaguely longitudinally impressed, the impression divided more or 
less distinctly into two parts by a polished longitudinal elevation. Elytra narrow, 
depressed, with rather narrow striz and also narrow but flat interstices; the stric are 
punctured, the interstice between each two punctures being obscure. Penultimate 
ventral segment with a slight elevation in the middle behind ; terminal segment deeply 
impressed, 
We have received only a small series of this species, but they vary a good deal in 
the punctuation ; the unique example from the State of Panama is remarkably small, 
and also sparsely punctate, but I can separate it by no good character. Judging from 
the unique type, Penthelispa porosa, Pascoe, is very near P. breviceps; but the South- 
American insect is larger and broader, and has the two impressions on the head 
separated by a broad space. 
3. Pycnomerus germanus, sp. n. 
Nigricans, elytris pedibusque rufescentibus, minus depressus, nitidus; prothorace irregulariter punctato, medio 
vage bi-impresso ; elytris profunde striatis, striis fortiter punctatis. 
Long. 3} millim. 
Hab. Guatema.a, San Joaquin (Champion). 
Antenne very stout, the termination of the club very distinctly pubescent and 
setose. Head moderately long, impressed on each side. Thorax about as long as 
broad, a little narrowed behind, the front margin very feebly sinuate behind the eye ; 
the surface shining, covered with moderately coarse, not crowded punctures, vaguely bi- 
impressed on the disc. Elytra deeply striate, the strie impressed with deep, elongate 
punctures, each of which looks as if formed from a coalesced pair. 
We have received only one example of this species; although very similar to 
P. breviceps it is perfectly distinct, the form of the head being different. 
Subfam. ACROPINA. 
In the typical genus, this group is very remarkable on account of the prolongation 
of the sides of the head; in Ethelema this occurs, however, only to a slight extent; 
but the structure of the under surface of the head is different to what it is in the 
Synchitine, so that no doubt the group is a quite natural one. 
ACROPIS. 
Acropis, Burmeister, Gen. Ins. i. no. 25 (1840). 
This peculiar genus has hitherto been known only from the Southern Continent of 
the New World, where about seven species have been discovered. 
3 P*2 
