II FURTHER STUDIES AMONG THE AMERICAN 



LONGICORNIA. 



This paper is merely a continuation of that which appeared in the 

 preceding number of this series of memoirs and comprises the por- 

 tions of the family Cerambycidse not there included, so far as the 

 more or less limited material forming part of the author's collection 

 will permit. The revelation of lack of careful observation on the 

 part of many authors who have written upon the Cerambycidae, 

 especially in regard to the structural characters pertaining to sex, 

 is even more patent throughout almost all the groups here studied 

 than might be inferred from the results arrived at in the first paper. 

 These conclusions, being so out of joint with current conceptions, 

 will give rise inevitably to much divergence of view wherever 

 interest of any kind is awakened, and this, in the present stage of 

 opinion, will generally take the form of opposition; but the only 

 request on the part of the writer, and one that he greatly desires 

 fulfilled, is that those who are disposed to criticize adversely shall 

 first make themselves thoroughly familiar with the subject by careful 

 and discriminating investigation. He has no excuse to make for 

 the large number of taxonomic units and subunits proposed, the 

 absolute value of which he is unable to fix in many cases, otherwise 

 than that they seem actually to exist in nature and should therefore 

 be recorded. However, to pretend that errors and probably many 

 of them are not mingled with statements of the truth, would be 

 equivalent to advocating a superhuman quality for the work. 



Family CERAMBYCID^. 

 Subfamily CERAMBYCIN^;. 



Tribe LEPTURINI. 



No very satisfactory way to classify the genera of this tribe has 

 been discovered, the tarsal characters used by LeConte and Horn 

 not being sufficiently radical and subject to exceptions. The genera 



T. L. Casey, Mem. Col. IV, Oct. 1913. 



193 



