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POPULAR SCIENCE MONTHLY 



in thirty years. Having visited both places, I can testify to the greater pro- 

 lificness of the Florissant beds. As a rule the CEningen specimens are better 

 preserved, but in the same amount of shale we still find at Florissant a much 

 larger number of satisfactory specimens than at CEningen, and the quarries are 

 fifty times as extensive and far more easily worked. 



The total number of species of insects so far described from Floris- 

 sant is about seven hundred, but several hundreds have been found, 

 belonging to groups not yet worked up. The list, as it stands, contains 

 only a single ant, but, as a matter of fact, ants are much more abun- 

 dant than any other insects, at least in individuals. Those obtained 

 by Scudder, and also the materials secured by the recent expeditions, 

 are all in the hands of Dr. W. M. Wheeler, of the American Museum 

 of Natural History. His account of them will be of extraordinary 

 interest, based as it will be on the examination of thousands of speci- 

 mens by a naturalist fully competent to make them contribute, not 



Fossil Incense Cedar (Heyderia coloradensis) with small piece of redwood 



(Sequoia haydeni). (Enlarged.) 



