460 
IXSECTA. 
some authors have placed certain species in genera of a similar form 
hut otherwise very different, such as Spheridium and Tritcma. 
N. ceneus. Fab.; N. viridescens, rufipes, var., Id.; Oliv., Col., 
II, ii, 12; 111,20, a, b; V, 33, a, b. Small; form, an oblong 
ovoid; of a brilliant bronze-green and midti-punctured; antennae 
blackish, terminated by a very large obtuse club ; thorax trans- 
versal, slightly emarginated anteriorly, and bordered laterally ; 
legs sometimes blackish brown, and sometimes fulvous*. 
Here the second and third joints of the antennae are almost equal in 
size, and the club is elongated in the form of a reversed cone, or is 
pyriform. 
Cercus, Lat.- — Catheretes, lllig . — DermesteSjLw. Fab . — 
Spheridium, Fab. Gyll. — Nitidula, Oliv. 
The body depressed, and elytra truncated; two first joints of the 
antennae much larger in the males of some species than in the fe- 
males, and perhaps this subgenus should consist of such only, refer- 
ring the others to Nitidula f. 
There the tibiae are long, narrow, and almost linear ; the elytra 
cover the abdomen and are not truncated. 
The body is oval, thorax trapezoidal, and the antennal club ob- 
long; its Uw first joints are nearly equal, and the third is hardly 
longer than the fourth. Such are the 
Byturus, Lat. Schoenh. — Dermestes, Geoff. Fab. Oliv. — Ips, 
Oliv. I 
Those that compose our sixth tribe, that of the Engidites, analog- 
ous to the Nitidulariee in the emargination of the extremity of their 
mandibles, are distinguished from them by their not projecting, or 
but very little and simply on the sides, bejmnd the labrum. 3'heir 
body is oval or elliptical, and the anterior extremity of the head 
slightly extended into an obtuse or truncated point. The tarsi con- 
sist of five II distinct joints, entire, and at most, slightly jiilose under- 
neath ; the penultimate is somewhat shorter than the preceding one. 
The antennae terminate in a perfoliaceous triarticulated club ; the 
elytra completely cover the abdomen, and the palpi are someAvhat 
thicker at the extremity. Some very small species inhabit the inte- 
rior of houses, and are frequently found on windows. 
We Avill unite them all in a single genus, that of 
Dac'ne. 
Dacne, Lat. — Engis, Fab. Dej. — Erotylus, Oliv. 
Their antennae terminate abruptly in a very large orbicular or 
* See Fabricius, Olivier, Gyllenhal, SclicenbeiT, &c. 
-f- See Gyllenh., Insect. Suec. I, p. 245. 
J See Schoenh., Synon. Insect. I, ii, p. 95. 
II Certain Cytophagi, or at least their males, according to some authors are 
heteromerous. 
