ANOBIDiE. 189 



chidce, to which Mr. W. S. Mac Leay acknowledges it exhibits an affinity worthy 

 of further investigation, 5 it exhibits likewise characters that connect it with the 

 Lamellicorns, and Phrenapates is similarly circumstanced. There are several such 

 characters that appear occasionally in all these tribes, thus lamellated antennae are 

 found in Phloiotribus and Sinodendrum, as well as in the Lamellicorns ; the spurious 

 joint between the claws of the tarsi is found in Bostrickus, as well as in Phrenapates 

 and the tribe just named ; all the tibiae are armed with spiny teeth in Sinodendrum, 

 Phrenapates, and some Bostrichi ; the head also is armed with a horn not only in 

 the two first, but in some species, of the last of these genera. 



Giving due weight to all these circumstances, I think it may be fairly deduced 

 from them, that the Passalidce by Phrenapates and Sinodendrum lead off to the 

 Bostrichidce, which are generally acknowledged to lead in their turn to the Rhyncho- 

 phorous beetles. Having cleared, as I hope, this point, I shall now proceed to the 

 description of the insects of the two latter tribes, taken in the Expedition. 



iv. Xylotrypa. Kirb. 



Family ANOBIDiE. 



Latreille has placed his Ptiniores, including the present family, at a great distance 

 from the other Lignivorous beetles, to which I agree with Mr. Stephens in think- 

 ing they properly belong; but I regard them as forming two families at least, 

 Ptinidce and AnobidcE. I hesitate, however, as to their place, for they seem to 

 occasion a disruption of affinities, if placed between the Bostrichidce and Scoh/tidce; 

 I am therefore disposed to consider them as out of the direct line, and forming a 

 branch from the former of these families. As there are only two species in the 

 collection belonging to this family, I shall describe them in this place. 



5 Hor. Ent. 33. 



