12 Annals Entomological Society of America [Vol. XII, 



from that. We also lack the most characteristic elements of 

 those faunas, the Austro-Riparian and Carolinian, which are 

 such a feature of the eastern part of North America. Thus 

 we have but a few Scarabaeidce and few Chrysomelidce as com- 

 pared with the East; no representative of Lucanus, Copris, 

 Onthophagus, Anomala and but few of Phyllophaga {Lachnosterna) 

 from among the Lamellicorns ; but a weak representation of 

 Melanotus, an Elaterid genus rich in species in the eastern 

 states; and not a single species of Evarthrus, Pasimachus and 

 Dicaeliis from among the Carabidae. Hence we may say that 

 the fauna of western North America as a whole when judged 

 from the standpoint of its insects, is a most distinct one, yet 

 one which can be linked with the faunas of the rest of the 

 world. 



