350 CLASS INSECTA. 



extremity, and the cases are synostosized. These insects also 

 make their domicile in herbals and collections.* 



The others have the body either oval, or ovoid, or almost 

 cylindrical ; the corslet of the breadth of the abdomen, at 

 least at its base ; the antennae sometimes uniforifl and serrated, 

 or pectinate, sometimes terminated by three articulations 

 much larger than the preceding. They are shorter than the 

 body. 



Ptilinus, Geoff. Oliv. Ptinus, Lin., 



Whose antennae, from the third articulation, are strongly 

 pectinate, or plumed in the males, and serrated in the fe- 

 males. 



These insects live in dry wood, and pierce it with small 

 holes. It is there also that they couple ; one of the sexes is 

 outside, and suspended in the air.-f- 



Xytelinus, Lat. Ptilinus, Fab., 



To which we unite Ochina of MM. Ziegler and Dejean, 

 have the antennas simply serrated in the two sexes. :|: 



DoRCATOMA, Herbst. Fab., 



In which the antennae finish abruptly by three larger arti- 

 culations, and of which the penultimate two are in the form 

 of the teeth of a saw. They are composed of nine articula- 



* Ptinus Scotias, Fab. Oliv. Col. ibid. 1. 2. Panz. Faun. Insect. Germ. V. 

 8 ; P. sulcatus. Fab. 



■\ Ptilinus pectinicornis. Fab. Oliv. Col. II. 17. bis. 1. 1 ; P. pectinatus. 

 Fab. ; ejusd. P. serratus ; Ptinus denticornis, Var. Panz. ibid. VI. 9. XXXV. 9. 



\ Ptili7ms pollens, Gevm.; I tinus serricornis, Fab In the Ochina kederce 

 the antennae are a little longer than those of the Xytelinae, a little less 

 serrated, with the second and third articulations almost of equal length. 

 I have not examined the other species of Ochina, mentioned by M. Dejean 

 in his catalogue (p. 40). 



