46 ANNULOSA JAVANICA. 
Tibie ad apicem latiores, extis denticulate. Tursi articulis quinque primis subpulvil- 
latis vel apice setigeris, articulo quarto minimo. 
Oss. Megauchenia is a difficult genus, but appears to have a strong affinity to Languria and to 
Cerylon, indeed principally differs from M. Latreille’s description of this last, according to what f 
have been able to observe, in having the clava of the antenne of three distinct joints with the 
labrum emarginate, and, in being pentamerous, in which last respect it agrees with Languria. 1 
suspect, however, that the Xylophagi of Latreille (which at present form a most artificial assem- 
blage) are in general pentamerous, and that it is merely owing to the minuteness of the fourth 
Joint, and to the small size of the insects themselves, that they have been placed by the entomolo- 
gists of the French school between the Linnean genera Curculio and Cerambyx—groupes be- 
tween which the transition is immediate and perfect. ‘* Natura opifex rerum, non facit saltus.” 
It is in this stirps, as has been before said, that we find the maxille recede the farthest from 
their typical form; it is in this stirps therefore that of the whole tribe we find the most herbi- 
vorous insects, This is eutious, certainly, but corresponds with an observation to be made on 
the herbivorous tribes of Coleoptera, namely, that where in an herbivorous groupe such as the 
Petalocera, we meet with a family such as the Trogide endued with an appetite for animal matter, 
we find its maxillee approaching in structure to those of the Adephuga,or at least to be furnished 
with two processes. 
90.  Sermpannrs. M. atropiceus, capite thoraceque subsetigero punctato-striatis : strits ulternatim setigeris. 
5 
Long. corp. 5° 
Caput clypeo anticé marginato, antennis piceis clava tomentosa. Thorax marginatus lateribus rugosulis- 
Elytra punctorum seriebus striata setisque brevibus spiniformibus instructa. Corpus subtus Pedesque 
picei. Tarsz sub-pulvillati. 
Genus SYLVANUS. Lat. permesTes Lin. Fab. 
This genus is said to have some relation to Trogosita, but on the nature and value of 
such relation, I am not at present able to offer any decided opinion. It may, however, be 
observed, that M. Latreille has described Silvanus as having two processes to the maxilla, and 
Trogosita as possessing only one. Such a remark may lead us to suspect a relation between Sil- 
vanus and the Cucujide, which is not improbable ; but however this may be, I repeat that a great 
portion of doubt must still hang over this arrangement of Latreille’s Xylophagi, inasmuch as 
we know not how many of them truly belong to the stirps of Necrophaga. No greater service can 
indeed be rendered to this part of entomology than by accurately dissecting these minute insects, 
of which so many genera and species are to be found in England; I question, however, whether 
it may be advisable to attempt at present a natural arrangement of them, because so few of the 
exotic species are known, and such wide chasms appear between several of the known genera. 
91. Denricutatus. S. fuscus, thorace crenato punctulato : lineis duabus impressis, elytris punctato-striatis, an- 
tennarum clava quadriarticulata. 
Long. corp. 3 . 
Insectum S. sendentato majus. Caput clypeo punctulato utrinque ante oculos unidentato antennis fuscis. 
Thorax 
