200 THE AMERICAN MUSEUM JOURNAL 



June and July and kindly invited the author to cooperate with 

 them in securing a collection for the American Museum and in 

 distributing the material to specialists for study and publication 

 in the "Museum Bulletin." The summer's work was successful 

 beyond expectation. Upwards of 2,000 specimens were secured, 

 largely with the assistance of Mrs. W. P. Cockerell and Mr. 

 Sievert A. Rohwer, who were indefatigable in carrying on the 



VIEW OF THE ANCIENT MIOCENE LAKE-BED AT FLORISSANT, COLORADO, LOOKING NORTH 



work of excavating and preserving the often very fragile plant 

 and insect remains. Professor Cockerell has undertaken to study 

 the plants, of which some 50 new species were found, and the 

 author will describe the ants, which comprise some 800 specimens. 

 Although these are the most abundant of all insects at Florissant 

 they have never been studied. Mr. A. L. Melander has promised 

 to describe the flies (Diptera), and Mr. C. T. Brues the smaller 

 Hymenopterous insects. It is hoped that Mr. C. Schaeffer of 



