62 MADEIRAN COLEOPTERA. 
A. oblong-ovate, conyex, rufo-piceous, very sparingly pubescent, ex- 
ceedingly shining, punctured,—the punctures on the elytra, how- 
ever, being very much smaller and more distant than those on the 
rest of the surface. Prothorav large and convex, being widest 
about the middle and with the sides almost equally (though 
slightly) rounded ; very delicately margined along its lateral edges, 
but almost immarginate along its hinder one (which however is 
rather distinctly sinuated). #lytra convex (the line of separation 
between it and the prothorax being more depressed than in the 
A, alternans), more or less brightly reddish-castaneous towards 
their base, but not much diluted in colouring towards their apex. 
Limbs long and slender,—the antenne being brownish-black with 
their base rufo-ferruginous, and the legs rufo-testaceous, though 
with their femora and tibie a good deal infuscated. 
The present Atomaria (which when immature is altogether of a 
paler, or more rufescent, tint) is allied to the following one,—from 
which however it may be immediately recognized, not only by its 
more oblong, narrower and less globose body, and by its more qua- 
drate prothorax (which is less dilated behind, and more dilated in 
front, than in that species), but likewise by its more highly polished 
and distinctly punctured surface, on which there are no indications 
(beneath the microscope) of the minutely and densely subgranulose 
structure which forms so marked a feature in the A. alternans. Its 
paler portions, moreover, are less brightly castaneous than those of 
that insect, and its legs are more infuscated in hue. It is a truly 
indigenous species, belonging to the same type (and that, moreover, 
from the great length of their limbs, apterous bodies, and singularity 
of colouring, a somewhat peculiar one) as the A. alternans,—with 
which indeed, although very much rarer, it is found in company. It 
was detected by myself, beneath fallen leaves, in the north of Madeira 
proper (in the dense forest region of the Lombo de Vaca), during 
August 1855. 
170. Atomaria alternans. 
A, globoso-ovata valde convexa nigra subglabra subnitida minutis- 
sime et creberrime granulata necnon levissime punctata, protho- 
race postice lato, capite elytrisque ad basin leete rufo-castaneis, ad 
apicem fere concoloribus, antennis pedibusque longis gracilibus, 
illis nigris basi rufo-ferrugineis, his rufo-testaceis. 
Var. 3. omnino rufo- castanea, elytrorum fascia media transversa an- 
tennarumque apicibus solum nigtis. 
Long. corp. lin, 2-4. 
Ephistemus alternans, Woll., Ins. Mad. 177 (1854). 
Inhabits the moist sylvan districts of Madeira proper,—occurring 
beneath fallen leaves, and vegetable refuse, at rather high and inter- 
