58 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 39 



used in the species diagnosis of insects. The following reports 

 of Illinois insects are available at the present time. These reports 

 are published in the Bulletin series of the Natural History Survey 

 and can be obtained by sending an order together with the proper 

 remittance to the Illinois Natural History Survey, Urbana, 

 Illinois. 



The Plant Lice, or Aphiidae, of Illinois, by Frederick C. 

 Hottes and Theodore H. Frison. $1.25. 



The Dermaptera and Orthoptera of Illinois, by Morgan Heb- 

 ard. $1.00. 



The Stoneflies, or Plecoptera, of Illinois, by Theodore H. 

 Frison. $1.25. 



Studies of North American Plecoptera, With Special Refer- 

 ence to the Fauna of Illinois, by Theodore H. Frison. $1.00. 



The Plant Bugs, or Miridae, of Illinois, by Harry H. Knight. 

 $1.25. 



The Caddis Flies, or Trichoptera, of Illinois, by Herbert H. 

 Ross. $1.50. 



The Mosquitoes of Illinois (Diptera, Culicidae), by Herbert 

 H. Ross. 50 cents. 



The Leafhoppers, or Cicadellidae, of Illinois, by D. M. 

 DeLong. $1.25. 



The Pseudoscorpions of Illinois, by C. Clayton Hoff. 50 cents. 



USEFUL BOOKS 



There is a considerable number of books that can be of 

 great help to the beginner in naming his specimens. The fol- 

 lowing are perhaps the most easily used. Others are being pub- 

 lished from time to time. 



An Introduction to Entomology, by J. H. Comstock. The 

 Comstock Publishing Company, Ithaca, N. Y. 



The Butterfly Book, by W. J. Holland. Doubleday, Doran 

 & Company, Garden City, N. Y. 



The Moth Book, by W. J. Holland. Doubleday, Page & Com- 

 pany, Garden City, N. Y. Out of print but may be obtained from 

 secondhand book dealers. 



Field Book of Insects, by Frank E. Lutz. G. P. Putnam's 

 Sons, New York, N. Y. 



Destructive and Useful Insects, by C. L. Metcalf and W. P. 

 Flint. McGraw-Hill Book Company, 370 Seventh Avenue, New 

 York, N. Y. 



Field Book of Ponds and Streams, by Ann Haven Morgan. 

 G. P. Putnam's Sons, New York, N. Y. 



The Insect Guide, by Ralph B. Swain. Doubleday & Com- 

 pany, Inc., Garden City, N. Y. 



College Entomology, by E. O. Essig. The Macmillan Com- 

 pany, New York, N. Y. 



