MADEIRAN COLEOPTERA, 4d 
figure and description of that insect,—which is stated by him to 
occur throughout Europe. 
206. Acritus homeocpathicus, n. sp. 
A, piceo-niger subnitidus undique subtilissime alutaceus et minute 
punctulatus, prothorace ad basin linea minus distincté e punctulis 
plurimis composité instructo, prosterno utrinque subrecto, meso- 
sterno antice in medio leviter rotundato sed immarginato, ad latera 
late et oblique truncato atque ibidem linea marginato, elytris sat 
distincte oblique striatis, antennis pedibusque fusco-ferrugineis 
subgracilibus. 
Long. corp. lin. 4. 
A. rather smaller, and a little more piceous, than the last species, 
also not quite so shining (its entire surface being minutely and 
densely alutaceous all over), and with its punctures a good deal 
smaller and rather more numerous. Prothorax with its row of 
basal impressions less distinct : prosternum nearly a parallelogram, 
and with its sides therefore much straighter than those of the 
A. minutus. Mesosternum rounded and unmargined in the centre 
(in front), and then obliquely truncated at either side (where its 
edges are margined),—causing a well-defined angle to be shaped- 
out at its junction with the metasternum. Hlytra somewhat lon- 
gitudinally-strigulose, and with the rudiments of a few oblique 
interrupted striz very evident. Limbs a trifle paler and slenderer 
than in the last species. 
A single example of this well-marked little Acritus was detected 
by myself in the Ribeiro de Sao Jorge, in the north of Madeira 
proper, during August 1855, Apart from its smaller bulk, alu- 
taceous surface, and much finer sculpture, it may be readily known 
from the A. minutus by the form of its prosternum,—which is very 
much straighter than in that insect (being in fact almost a parallelo- 
gram): its mesosternum, also, is rounded merely in the centre, in 
front (and even there but slightly), it being obliquely incurved, or 
truncated, at either side,—-causing the angle between it and the 
metasternum to be exceedingly well defined. The anterior rounded 
portion, likewise, which is of exactly the same breadth as the base of 
the prosternum, is wmarginate,—the truncated edges being alone 
thickened into an elevated line. In the structure of its mesosternum 
indeed it is almost identical with De Marseul’s figure of the A. nigri- 
corms ; nevertheless it recedes from that species not only in its more 
parallel prosternum, but in many other particulars,—as, for instance, 
its densely alutaceous surface, paler antenne, and by the rudiments 
of its oblique elytral strize being exceedingly apparent. It is of about 
the size of an ordinary homeopathic globule, a circumstance which 
has suggested its specific title, 
