84 PROCEEDINGS OF THE ACADEMY OF 



NOTES ON THE PECIES OF BTJPRESTIDJE FOUND IN THE 

 UNITED STATES. 



BY G. R. CROTCH, M.A., CANTAB. 



Since the revision of this family, by Dr. Leconte, appeared in 

 1859, considerable changes have become necessary, both by the 

 accretion of new material, and by the more exact determination 

 of Gory's species. Dr. Leconte took -n-itli him on his recent visit 

 to Europe types of all his species ; these were carefully compared 

 by himself and others, so that we now have a probably accurate 

 idea of the species that Gory intended to represent. This synon3'my 

 has been embodied in the present paper, together with the results 

 of a detailed examination of all the species by myself; which has 

 resulted in the suppression of a certain number as races or even 

 mere varieties. In this I shall probably not be followed by some, 

 and if structural characters that I have overlooked can be pointed 

 out, I shall gladl}'^ reverse my decision. The species of Dicerca 

 and Agrilus, two of the most troublesome genera, have been 

 tabulated out ; but it has proved- impracticable to construct a 

 similar table for Chrysohothris or Acmceodera. A certain number 

 of new species have been described from the cabinets of Drs. 

 Leconte and Horn, but the subject is far from being exhausted. 



Chalcophora. C. lacustris^ Lee, seems to me to be no doubt 

 a variety of C. virginiensia^ from which C. angulicollis can only 

 be separated as a race. Similarly the two species formed from G. 

 liberla do not appear to me to be entitled to specific rank, having 

 in consideration the great changes liable to occur in sculpture in 

 this family. 



C. langeri is certainly only G. campestris. 



PsiLOPTERA. P. Wehbii has been identified with P. Driim- 

 mondi, Gory; and I cannot see that P. Woodhousii differs in 

 any tangible manner from it. 



DiCERCA. 

 1. D. prolongata, Lee. 1. c. p. 194. 



Tliis agrees well with the description of Sle7iii7-a tenehrica, 

 Kirby. 



It differs from B. divaricata by the darker color, and the 



