100 SERRICORNIA. [Athous. 
Female broader, less parallel and more convex, with the thorax 
broader and rounded and narrewed in front, and the antenne much 
shorter; the elytra are considerably broader in proportion, and are 
slightly widened before apex; this sex much resembles at first sight a 
light example of A. vittatus, but may at once be known by the sculpture 
of the thorax, which is much coarser and duller, and the very short 
second joint of the antenne. 
By sweeping herbage; local; rather common and generally distributed from the 
Midland districts southwards, but much rarer further north; the male is usually 
common where it occurs, but the female is always very scarce ; Northumberland dis- 
trict, one female only taken at Gibside by Mr. J. K. Taylor ; Scotland, very rare, 
Forth district, ‘‘ Dalmeny Park, near Edinburgh,” Murray’s Cat. 
A. difformis, Lac. (2 cavus, Germ.). Larger, more darkly 
coloured, and more shining than the preceding species, with which it is 
rather closely connected as far as structure is concerned ; the second 
joint of the antenne, also, is longer in proportion, and the thorax is less 
thickly punctured, with the central furrow less evident ; colour lighter 
or darker reddish-brown, with the head and thorax often darker, the 
sides and posterior angles being usually lighter than the disc, pubes- 
cence fine, greyish ; head rather coarsely punctured; thorax thickly 
but not rugosely punctured; elytra with fine strie, interstices finely 
punctured and more or less rugose transversely, especially in the male. 
L. 9-10 mm. 
Male with the head deeply impressed, the antenne a little longer than 
in female, and the thorax narrower, rectangular and parallel-sided ; the 
elytra are narrower and more parallel, with the striz finer and the inter- 
stices more rugose transversely. 
Female with the head not depressed, the antenne a little shorter, 
with the first joit longer, and the thorax more finely punctured, with 
the sides less parallel, somewhat rounded and narrowed in front, and 
the anterior angles much less pronounced; the strie of the elytra are 
rather stronger, but the interstices are more finely and less rugosely 
punctured ; this sex much resembles A. vittatus, but may be known by 
having the thorax more finely punctured, and the sides straight and not 
sinuate before the posterior angles. 
Grassy places by sweeping, &c., especially at night ; for a long time it was con- 
sidered one of our rarest British beetles, but has recently been taken in numbers by 
Mr. Butler and others in the south of England; the female, however, appears to be 
always very much scarcer ; Eastry, Kent (Gorham); Ramsgate, in alders (Stephens) ; 
Shepherd’s Well and Sandwich (Waterhouse) ; St. Peter’s, Kent (T. Wood) ; Deal (C. 
G. Hall); Hastings district, in numbers (Butler, Collett, &c.) ; one specimen is said 
to have occurred at Newton, Devon. 
A. hemorrhoidalis, F. (rujicaudis, Steph.). Elongate, sub- 
parallel, clothed with rather thick greyish pubescence, pitchy brown or 
brown, with the head and thorax black, sometimes brown, but usually 
darker than elytra, which are sometimes lighter brown; head thickly 
