460 INSECTA, 



some authors have placed certain species in genera of a similar form 



but otherwise very different, such as Spheridium and Tritoraa. 



A', 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 multi-punctured; antermoe 

 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,Her6^/. Illig. — Dermestes,Li«. 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 sid)genus 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 two first joints arc nearly equal, and the third is hardly 

 longer than the fourth. Such are the 



Byturus, Lat. Schaiih. — Dermestes, Geof. Fab. Oliv. — Ips, 

 Oliv. X 



Those that compose our sixtli tribe, that of the Engidites, analog- 

 ous to the Nitidulariae in the emargination of the extremity of their 

 mandibles, are distinguished from them by their not projecting, or 

 but very little and simj^ly on the sides, beyond the labrum. Their 

 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 pilose 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 somewhat 

 thicker at the extremity. Some very small species inhabit the inte- 

 rior of liouses, and are frequently found on windows. 



We will unite them all in a single genus, that of 



Dacne. 



Dacne, Lat. — Engis, Fab. Dej. — Erotylus, Oliv. 

 Their antennae terminate abruptly in a very large orbicular or 



* See Fabricius, Olivier, Gyllenlial, Schcenherr, &c. 

 t See Gyllenh., Insect. Suec. I, p. 245. 

 X See Schoenh., Synon. Insect. I, ii, p. 95. 



II Certain Cytophagi, or at least their males, according to some authors are 

 heteromerous. 



