352 CLASS INSECTA. 



Anobium perfinax,oi Fabiiciixs; Striatum, Olivier, Panz. 

 ibid. LXyi. 5, very much resembles the preceding, but it is 

 smaller, and has no yellow spots at the posterior angles of 

 the corslet. It is very common in houses. M. Dufour has 

 observed that some appendages form around its pylorus a 

 sort of ruff. 



A. patiiceum. Fab. A. minutum^ ejusd. Oliv. ibid. II. 9, 

 is very small, fawn-coloured, with the corslet smooth, and the 

 cases striate. It reddens farinaceous substances, and ravages 

 collections of insects when suffered to multiply there. It 

 establishes itself also in cork. {See Schoenh. Synon. Insect. 

 I. 2, p. 101.) Some species of Fabricius are referable to the 

 genus Cis. 



The third and last section of the Serricornes, forming 

 also a final tribe, that of Xylotrogi, and being distinguished, 

 as we have already said, from the preceding two, by having 

 the head entirely disengaged, is composed of the genus 



Lymexylon, Fab. 



We divide it thus : 



Some have the maxillary palpi much larger than the labial, 

 pendant, in the form of a comb or tuft in the males, and ter- 

 minated by a large ovoid articulation in the females. The 

 antennae are short, a little widened towards their middle, and 

 slender towards the end. The tarsi are filiform, with all the 

 articulations entire. The posterior four are long and very 

 slender. Those whose elytra are very short, in the form of 

 a small scale, compose the genus 



Atractocerus, Palis, de Beauv. Necydalis, Lin. Ly- 

 t/iea!ylun, Fab. 



The antennae are compressed, and almost fusiform. The 

 corslet is square, and the abdomen depressed. 



A. nerydaloides, Palis, de Beauv. Magaz. Encyc. Necy- 



