Trachys. | SERRICORNIA. 73 
Ckatham, Darenth Wood, Coombe Wood, Chattenden; Hastings; Portsmouth dis- 
trict ; Dorset ; Lords Wood, Southampton; Huntingdonshire; Wood Ditton, Cam- 
bridge ; Langworth Wood, Lincoln, 
T. pumila, [1]. (intermedia, Lap.). Allied to the preceding, but at 
once distinguished by its smaller size, and shorter, more ovate, and more 
convex form, as well as by its more shining appearance, more even 
surface, and the very strong and much more distinct and regular punc- 
tuation of the elytra; the shoulders of the latter are not so much marked 
and the sides are more rounded near base, and the pubescence is uneven, 
and often obsolete, and when present does not take the form of waved 
bands; the size is very variable. L. 1;-22 mm, 
By sweeping herbage ; occasionally at the roots of plants (Marrubium vulgare, &e.)? 
and in moss on chalky hill-sides ; extremely local; Mickleham, Surrey, where it has 
been found in numbers by Dr. Power, and subsequently has been taken by Mr. 
Champion; Soutlrwick, near Southsea (Moncreaff); I know of no other British 
locality for this insect; it used to be erroneously inserted in our catalogues as 7. 
nana, F'., which is a different species that has not hitherto occurred in Britain. 
T. troglodytes, Gyll., nec Lap. (pygmea, W. C., nec F.). Of 
much the same shape as the preceding, but easily distinguished by its 
colour; head and thorax of a dark shining ecoppery colour, the former 
deeply excavate and channelled, the latter even, except for slight 
depressions at sides, finely and sparingly punctured, and occasionally 
impunctate ; elytra without pubescence, of a dark blue colour, convex, 
rather strongly but not deeply punctured in rows, and in part trans- 
versely rugose ; under-side brownish-bronze; legs dark, more or less 
metallic. L. 23 mm. 
By sweeping herbage, flowers, &c.; occasionally in moss; very widely distributed, 
but always rare; Coombe Wood (Stephens); Chatham (J. J. Walker) ; Folkestone 
(Waterhouse) ; Guestling, near Hastings (Butler); New Forest; Glanvilles Wootton 
(Dale and Wollaston); Holm Bush, Brighton (Power) ; Weston ; Barmouth (Chap- 
pell) ; Cambridge (Stephens); St. Faith’s, Norwich (Power); Hornsea; Knowle, 
near Birmingham (Blatch) ; Scotland, very rare, Solway district (Sharp). 
THROSCIDA. 
This family has been by several authors classed with the Eucnemide, 
but appears to be distinct by reason of the formation of the anterior 
coxal cavities, which are formed by the pro- and mesosternum, whereas 
these parts in the Eucnemide and the Elateride are entirely prosternal ; 
this character is also found in the Scaphidiide, and has been before 
alluded to as being to a certain extent present in Hphistemus (Vol. III. 
p- 7); from the Elateride the family is distinguished by the faet that 
the thorax is more closely applied to the body, and that the species 
have not the power of leaping if placed on their back, The following 
are some of the chief characters:—Head sunk in thorax as far as eyes, 
