432 Rev. F. D. Morice’s Illustrations of 
protest) are (except a few at the apex) more elongate, not 
separated by such wide intervals, and much more con- 
spicuously and intricately denticulated. Also the saw as 
a whole widens less rapidly from the apex towards the 
base. This is particularly noticeable in aericeps, in which 
the inferior and superior margins of the saw might almost 
be said to run parallel to each other. The corrugations 
crossing the blade diagonally are armed with sharp teeth 
in all these species, but the character is not so conspicuous 
in these as in certain other cases. 
Anticus (Plate XXIII, 11) and dubius (Plate XXIII, 10) 
agree closely in the great development of tooth-like 
projections on the diagonal corrugations (a pair on 
each !), and also in the triangular not quadrate form 
of the so-called saw-teeth, and the large bold denticu- 
lation .of their cutting edges. These characters belong 
also to gessnert (Plate XXIV, 5), a species whose saws 
are almost exactly like those of dubius, though it would 
not have been reckoned as a Dosytheus by the old 
authors since its abdomen is not testaceous but black! 
From both dubius and gessneri the saw of anlicus is dis- 
tinguishable at a glance, by the more projecting “teeth” 
and the wider intervals which separate their cutting edges, 
also by the humpy undulating apex of its superior margin 
—in which respects it resembles a good deal the group of 
etruscus and bimaculatus. (There is an indication of the 
same character in the saws of pratensis, etc., but it is much 
less developed there !) 
The saw of ferrugatus, Lep. = thomson, Knw. (Plate 
XXIII, 12), is utterly unlike that of anticus, though in 
most external characters the two species resemble each 
other so closely that they are often confounded in 
collections. (Nearly all British specimens which have come 
to my notice under the name anticus really belong to 
ferrugatus; in fact, I have only once seen a real British 
anticus, which was captured by Mr. E. Atmore at King’s 
Lynn.) I cannot place the saw of ferrugatus anywhere 
but in a group by itself. Compared with anticus, ete., it 
is curiously narrow, the denticulations of its cutting edges 
are numerous and distinct but very small, and the armature 
of its lateral corrugations is almost obsolete. 
Triplicatus, madidus and schulthessi (Plate XXIV, 1, 
2, 3) have extremely similar saws. In all three the 
corrugations appear to be edentate. The cutting edges 
