COLEOPTERA. 63 
Here the thorax is thick, narrower than the abdomen, and almost 
orbicular or nearly cordiform. The antenne thicker at the extre- 
mity and the thighs clavate. 
Lystronicuus, Lat. * 
There the thorax is depressed, trapezoidal, and its posterior margin 
is as wide as the abdomen, or hardly narrower. The antenne are 
filiform or slightly enlarged towards the extremity. In 
CistEwa, Fab., 
Or Cistela properly so called, the head projects in the manner of a 
snout, and the labrum is hardly wider than it is long; most of the 
joints of the antennz either obconinal, triangular, or even serrated ; 
the last is always oblong. The body is ovoid or bordering on an 
oval. 
C. ceramboides ; Chrysomela ceramboides, L; Oliv., Col. 
III, 54, 1,4. This species, on accouut of its antennz, of which 
the three first joints are shorter than the following ones, and of the 
serrated form of the latter, might constitute a separate subgenus: 
It is five lines in length; black; elytra reddish and striated ; 
thorax almost semicircular. The larva inhabits the tan of old 
Oaks, where it undergoes its metamorphosis. 
C. sulphurea; Chrysomela sulphurea, L. ; Oliv.,Ib., I. 6. A 
more elongated form than that of the ceramboides; length four 
lines; lemon-yellow ; eyes black; elytra striate; antennee sim- 
ple. Very common on different flowers, those of the Yarrow 
particularly +. 
Mycertocuarss, Lat—Mycrroruma, Gyll., Dej.—CistELa, Fab. 
Where the head does not project in the manner of a snout; where 
the labrum is very short, transversal and linear, and where most of 
the joints of the antenne are short and nearly turbiniform ; the last 
is ovoid. The body, particluarly in the males, is narrow and elon- 
gated. The maxille and the labium are soft { 
In the others, the penultimate joint of the tarsi is bilobate, and the 
last of the maxillary palpi strongly dilated and securiform. The body 
is generally more oblong. They form the 
Auecuna, Fab.§ 
The third tribe, that of the SerropaupivEs ||, is remarkable, as inti- 
* Helops equestris, Fab., and some others from Brazil ;—Helops columbianus, 
Germ. ;—Notoxus helvolus, Dalm. 
+ See Lat., Gener. Crust. et Insect., II, p. 225; Oliv., Col., Ib.; Schenh., 
Synon. Insect. I, ii, p. 332, et seq. 
t See Gyllenh., Insect. Suec., I, ii, p. 451; Lat., Gener. Crust. et Insect., II, 
p- 189, Helops barbatus. The name of Mycetophila haying been employed by M. 
Meigen, I have thought it necessary to give a substitute in Mycetochares. 
§ The Allecule contracta, geniculata of Germar—lInsect. Spec. Noy., p. 163, 164 
—havye their anterior tarsi strongly dilated. 
|| The Securipalpes of my Fam. Nat. du Régne Animal. The term Serropalpides 
is preferable, inasmuch as it reminds us of the genus Serropalpus, which forms part 
of this tribe. 
