NATURAL SCIENCES OF PHILADELPHIA. 



349 



Oorenopiis sulcipennis. 

 Hypophlceus parallelus. 

 Sitophagus planus. 

 Notoxus, two species. 

 Pentaria trifasciata. 

 Meloe sublsevis. 

 Megetra cancellata. 

 Epicauta maculata 

 sericans. 

 ferruginea. 

 Lytta biguttata. 

 puberula. 

 Tetraonyx fulva. 

 Nemognatha immaculata. 

 Tanymecus lautus. 

 Prionus californicuS, 



Criocephalus sp. 

 Sphenotheca suturalis. 

 Tylosis sellatus. 

 Elaphidion procerum. 



tenue. 

 Clytus sagittatus. 

 J^thecerus Wilsoni Chevr. 



Arhopalus Wils. Horn. 



Clytus cinctus Chevr. 

 ^Edilis spectabilis. 

 Tetraopes basalis. 

 Oncideres sp. 

 Chrysomela dislocata. 

 Chrysomelide not determined. 

 Hippodamia convergens. 



Revision of the DASYTINI of the United Scates. 

 BY JOHN L. LECONTE, M. D. 



Having recently had occasion to examine all th e species of D a s y t i n i in 

 my collection, I have detected among specimens received since the publica- 

 tion of my previous memoir, in 1852, several undescribed species. In order 

 to fix more definitely the characters, not only of the new species, but of those 

 previously described, I have prepared a sketch of the genera and analytical 

 tables of the species before me. 



Much of the Pacific district yet remains unvisited by collectors, and a large 

 increase in the number of representatives of this tribe may be expected from 

 future eypiorations. 



In all the genera found in our territory, as far as known to me, the terminal 

 spurs of the anterior tibiae are very small. They may be tabulated as follows ; 



A. First joint of tarsi not shorter than the second; 



(claws of tarsi equal in length, second and 

 third joints of tarsi not dilated, and last joint 

 of palpi not securiform in any of our genera): 



Anterior tibiae with an external row of spines Pristoscelis. 



Anterior tibiae without spines : 



Membranous appendages equal, nearly as long 



as the claws ; in great part connate.. Listrus. 



Appendages connate ; one long, the other shorter Dolichosoma. 



One appendage long, connate, the other denti- 

 form All onyx. 



Both appendages short, connate, usually denti- 

 form Dasy tes. 



Membranous appendages long, equal, free to the 



base Eschatocrepis. 



B. First joint of tarsi shorter than the second Melyris. 



On comparing this table with those of European genera, as given by 

 DuVal* and Kiesenwetter,f it will be seen that the characters here ascribed 

 to Listrus correspond with those of Lob onyx, and those of Escha- 

 tocrepis with those of Haplocnemis. The differences will be men- 

 tioned under the respective genera. 



* Genera des Coleopt. d'Europe. iii , 190. 

 f Insecten Deutscblands, iv., 624. 



1866.] 



