144 THE CANADIAN ENTOMOLOGIST. 



" Prothorax scarcely longer than wide — villosuni. 



" Prothorax distinctly longer than wide —paraiieium." 



From the insects before me from the hickory, it is easy to pick out 

 some with the thorax fully one-fourth wider than long, and others with it 

 one-fourth longer than wide, but they are brought together so insensibly 

 by intermediates, that where the proper separation into species should 

 begin it is impossible to decide. The same may be said of the differences 

 in elongation, narrowness and pubescence ; and I can find no basis for 

 retaining parallelum as even a racial or varietal name. 



I trust the foregoing may stimulate such as have opportunity to inves- 

 tigate the habits of this interesting beetle more thoroughly. I mention 

 some of the points that require clearing up. First, the length of time 

 occupied in the metamorphosis of such as breed in the branches of living 

 trees One year is certainly an error, as it is opposed to the known his- 

 tory of any other Cerambycide having a similar habit. Second, whether 

 the falling of the limb is not accidental, the majority containing larvae not 

 being weakened enough to break. Third, whether the end of the limb 

 remaining on the tree does not contain the insect equally with that which 

 falls — points that might be determined by cutting down a tree in autumn 

 from which limbs had been pruned. Fourth, to make a collection for 

 comparison from each species of tree infested. 



Besides the accounts of Professor Peck, Fitch and Harris, the follow- 

 ing bibliography may be noticed : 



Haldeman — Trans. Am. Phil. Soc, vol. lo, p. 34. 



Larva feeds on the living [?] wood of oak, hickory and chestnut ; also 

 dead Abies. 



Riley — American Ent, vol. 2, p. 60; ib. vol. 3, p. 239. 



Larva bores in plum and apple twigs, and in dry grape cane, Missouri 

 Rep., 3, p. 6. Bores into and prunes the limbs of the apple. Ib. 4, p. 

 54. Bred abundantly from injured grape stems. 



Rath von — U. S. Agricultural Rep., 1861, p. 615. 



Merely a synopsis of Fitch's account, 



Packard, jr. — Bui., No. 7, p. 30. U. S. Enlumoiugical Commission. 



Scissored from Fitch in full. 



Clarkson — Can. Ent, vol. 17, p. 188, and vol. 19, p. 31. 



Discovers that the insect completes its metamorphosis in the fall and 



