N a ij] FOURTH BIENNIAL REPORT 1 3 



subdivision of the Orthoptera. The Orthoptera constitute a 

 larger and more important order, including, besides some less 

 familiar forms, the cockroaches, the locusts and grasshoppers, 

 the katydids, and the crickets. The mere mention of the names, 

 locust and grasshopper, is enough to suggest the importance of 

 the economic relations of the Orthoptera. Part I. of this bulletin 

 is illustrated by a series of plates, representing typical examples 

 of all the principal orders of insects. Part II. is illustrated by 

 a number of plates from photographs of entire insects represent- 

 ing different groups of Orthoptera, and by numerous figures in 

 the text from drawings of diagnostic parts of the anatomy of 

 various families and genera. 



BULLETINS ACCEPTED FOR PUBLICATION. 



The following Bulletins have been accepted for publication : — 



Guide to the Insects of Connecticut: prepared under the 

 direction of Wilton Everett Britton, State Entomologist, and 

 Entomologist of the Connecticut Agricultural Experiment Sta- 

 tion. Part III. Hymenoptera of Connecticut: by Henry Lorenz 

 Viereck, of the United States National Museum. 



The Triassic Fishes of Connecticut: by Charles Rochester 

 Eastman, Curator of Vertebrate Paleontology in the Museum of 

 Comparative Zoology, Harvard University. 



The Echinoderms of Connecticut: by Wesley Roswell Coe, 

 Professor of Biology in Yale University. 



Drainage and Glaciation in the Central Housatonic Basin: 

 by Ruth Sawyer Harvey. 



The Hymenoptera which are treated in the bulletin by Mr. 

 Viereck, form one of the largest and most important of the 

 orders of insects. The marvelous instincts and habits of bees, 

 wasps, and ants have always attracted the interest of thoughtful 

 observers. Many of the Hymenoptera are of very great eco- 

 nomic interest. The bees, by their transportation of pollen from 

 flower to flower, are indispensable for the fertilization and con- 

 sequent propagation of a great many plants. Many of the 

 smaller Hymenoptera, as the ichneumon flies, are parasitic upon 

 other insects, and thus serve to keep in check insects which would 

 otherwise be destructive pests to the agriculturalist. Some of the 

 Hymenoptera, on the other hand, as the saw-flies, are themselves 

 prominent among the destroyers of agricultural products. Mr. 



