Coiitri1)iitions to the Descriptive and Systematic 

 Coleopterology of IVorth America. 



PART II. 

 By Thos. L>Casey, Lieut, of Eng'rs, U. S. A. 



This, the concluding part of tlie present work, contains descrip- 

 tions of new species and genera, and systematic revisions of several 

 genera as represented in the United States ; among the latter are 

 Euplectus and Apocellus. 



The descriptions are very minute and full of detail, perhaps some 

 may consider them unnecessarily so, and in several places characters 

 may be given which not only belong to the species described, but to 

 tlie entire genus or group in question ; I have done this in many cases 

 inadvertently, and hope that the descriptions will not thereby be 

 rendered more confusing. It has been my aim not only to describe 

 the species, but to make a separate study of each, not only in order 

 to verify previous observations, but to lind if possible other characters 

 which may serve as bases of classification. If the descriptions be 

 read carefully it will be seen that occasionally characters are given 

 which may prove useful in a systematic treatment of the genus, but 

 which I have not had an opportunity to verify througliout, because of 

 the very limited material at my dis[)0sal ; nothing is definitely stated 

 in such cases respecting the value of the character for the [)urposes 

 above indicated. 



In I'elation to minuteness of detail, it may be permitted me to quote 

 an objection advanced by several entomologists, among whom, un- 

 fortunately, all those who have had to identify species from descrip- 

 tions know only too well the late Dr. LeConte must be numbered ; it 

 depends indirectly upon the methods of observation employed, the 

 optical means adopted by the author being tlie binocular microscope, 

 with mechanical universal-jointed stage-clip for holding the pin and 

 insect together, while the latter is under examination ; it is, in sub- 

 Cont. Part II. 1 December, 1884. 



