212 SERRICORNIA. [ Rhopalodontus. 
RHOPALODONTUS, Melli¢. 
This genus contains five European species, which are distinguished 
from Cis by the shape of the anterior tibie, and by having the tibiz 
dilated and denticulate at apex; some authors have assigned R. fronti- 
cornis to the genus Hnnearthron, believing the antenne to be 9-jointed ; 
the three joints preceding the club are very small, and a mistake might 
be made if a low magnifying power were used, or under certain lights ; 
I have, however, carefully examined several specimens, and they are 
plainly 10-jointed, the first two joints being large and inflated, the next 
two elongate but much more slender, the following three minute and 
transverse, but very distinct, and the last three forming a well-marked 
club. 
I. Size larger; punctuation of elytra very coarse. . . R. PERFORATUS, Gyll. 
II. Size smaller ; punctuation of upper surface fine . . R. FRONTICORNIS, Panz. 
R. perforatus, Gyll. (punctiger, Waltl.). Oblong, short, broad 
and robust, cylindrical, parallel-sided, of a lighter or darker pitchy 
brown colour, rather scantily clothed with long pubescence; antennz 
testaceous; thorax broader than long, convex, rather dull, finely 
margined, with the sides and hinder angles rounded, -upper surface 
finely and closely, but rather distinctly punctured ; elytra as broad and 
twice as long as thorax, and of a lighter colour, short and cylindrical, 
with very coarse and strong punctuation, the punctures being large and 
round, and arranged in more or less distinct rows, and with a sutural 
stria at apex ; under-side finely and thickly punctured ; legs yellow. 
L. 17-2 mm. 
In fungi; very rare; Scotland, Highlands, Tay district ; it was first discovered in 
Britain by James Foxcroft, who reared it from boleti gathered by him from old birch 
trees in the Black Forest, near Rannoch, Perthshire, and it was afterwards taken by 
Turner in the same locality. 
The short broad form, very coarsely punctured elytra, and long 
pubescence will at once distinguish this species from all our other 
Cissidee. 
R. fronticornis, Panz. A small and rather narrow species, oblong, 
convex, not very shiny, black or pitehy black, sometimes lighter ; clothed 
with fine and even pubescence ; antenne testaceous with club darker ; 
thorax about as long as broad, or very slightly transverse, very finely 
punctured, with the sides finely margined, and the angles obtuse or 
rounded ; elytra less closely punctured than thorax, as a rule lighter 
at apex; legs testaceous. L. 1-13 mm. 
Male with two erect small horns on clypeus, and with the anterior 
margin of thorax emarginate at apex, and produced into a minute 
tubercle or horn on each side of the emargination. 
In fungi; on old willows; very local, and, asa rule, rare; Weybridge, Claygate, 
and Cowley (Power). 
