162 Col copter a of the Eastern 



After a most attentive examination, no difference can be perceived 

 between our specimens, and those from the north of Europe. 



2. Bembidium impressum Fabr. — Occurs abundantly about Lake 

 Superior. Dr. Richardson's party also found it in many northern 

 situations. 



3. Bembidium paludosum Fabr. — This species inhabits the 

 banks of streams emptying into Lake Superior. It is to be care- 

 fully distinguished from B. inaequale Say, which it closely resem- 

 bles, and which I obtained near the Rocky mountains. 



{ 4. SilpTia Lapponica Fabr. — caudata Say. — This insect is found 

 in every part of the continent, from the Atlantic to the Pacific, north 

 of 42°. 



5. Corynctcs (Nccrobia) violaceus Fabr. — This necrophage ap- 

 peal's to increase in numbers, the farther it is removed from the 

 haunts of man : in the barren regions adjoining the Rocky Moun- 

 tains, where insects reign in almost undisputed mastery, unchecked 

 by scarce a single foe, it may be observed covering the ground un- 

 der any small piece of animal matter, which has been overlooked 

 by the wolves and ravens, or which has defied the power of their 

 teeth and beaks. 



G. Bost ric Int a typographies and others of the same genus. 

 . VI "ij 1. 1 ml in every place under the bark of pine trees. 



7. Coccinella Z-fasciata Fabr. — from Lake Superior. 



8. Hippodamia \Z-pwtctata Fabr. found every where. 



In these species, as in the preceding, observation fails to detect 

 the slightest difference between the American and European speci- 

 mens. 



Several other examples mighl be easily adduced, but to some 



of them it would be urged, that by some possibility* they might 



have been introduced. In the selections made, all Buch have been 



ided, and thos< Ikewise been excluded, which 



have nol b ■>> . ubmitted to a stricl comparison with well authenti- 



I Lndrt iduals from the old world. 



Many in tana bl likewise be obtained from other orders of 



a Cardui, and some Bpecies of Pierit from the 



