No. 22.~\ HYMENOPTERA OF CONNECTICUT. 15 



determining material. Some of these specialists have prepared 

 portions of this paper, and are given credit in connection with 

 their work, as follows : 



Professor A. D. MacGillivray, Superfamily Tenthredinoidea ; 



Professor W. M. Wheeler, Superfamily Formicoidea. 



Mr. C. T. Brues, Superfamily Serphoidea or Proctotrypoidea, 



and Families Cosilidge and Bethylidae of the Superfamily 



Vespoidea ; 

 Mr. S. A. Rohwer, Superfamilies Sphecoidea and Vespoidea 

 (excepting groups in these superfamilies otherwise credited). 



In the succeeding pages, wherever a species is known to have 

 been originally described from Connecticut it is preceded by a *. 

 The species preceded by a are those whose known distribution 

 and habits indicate their probable presence in the state, though 

 not yet collected. 



BIBLIOGRAPHY. 



For a more detailed account of the Hymenoptera than can be 

 given here the reader is referred to the following publications, 

 which can be found at most book stores or in public libraries : 



Entomology with special reference to its Biological and Economic As- 

 pects. J. W. Folsom. vii + 485 pages, 5 plates, 300 figures. P. 

 Blakiston's Sons & Co., Philadelphia, 1906. Second edition, 1913. 



A Manual for the Study of Insects. J. H. and A. B. Comstock, vii + 701 

 pages, 6 plates, 797 figures. Comstock Publishing Co., Ithaca, 

 N. Y., 1905. 



The Insect Book. L. O. Howard, xxvii + 429 pages, 48 plates, 264 

 figures. Doubleday, Page & Co., New York. 1901. 



American Insects. V. L. Kellogg, vii + 764 pages, 13 plates, 812 

 figures. Henry Holt & Co., New York, 1905. 



The Elements of Insect Anatomy. J. H. Comstock and V. L. Kel- 

 logg. Revised edition. 134 pages, 11 figures. Comstock Publishing 

 Co., Ithaca, N. Y., 1899. 



Bees and Bee-Keeping. F. R. Cheshire. 2 volumes. Volume I, vii + 

 336 pages, 8 plates, 71 figures; volume II, 652 pages, 127 figures, 1 

 plate. L. Upcott Gill, London, 1886. 



Wasps, Social and Solitary. G. W. and E. G. Peckham. xiv + 311 

 pages, illustrated. Houghton, Mifflin & Co., Boston and New 

 York, 1905. 



Pinacographia. S. C. Snellen van Vollenhoven. Martinus Nijhoff, The 

 Hague, Holland, 1880. 



Schetsen. S. C. Snellen van Vollenhoven. Martinus Nijhoff, The 

 Hague, Holland, 1868. 



