PROC. ENT. SOC. WASH., VOL. 24, NO. 5, MAY, 1922 117 



-21) WEBSTER, F. M. 



1908. The Value of Insect Parasitism to the American Farmer. In U. S. 



Dept. Agr. Yearbook 1907, p. 237-256, fig. 7-30. 

 (22) SMITH, J. B. 



1910. Insects of New Jersey. Ann. Rept. \. J. State Mas. 1909, 888 p., 



340 fig., 1 fold. map. Literature cited p. '>52. 

 23 PETTIT, R. H. 



1910. Insects of Field Crops. Mich. Sta. Agr. Col. Exp. Sta. Bui. 258, 

 84 p., 51 fig. Literature cited p. 28, 35-36. 



i 24 1 HOWARD, L. O., and FISK.E, W. F. 



1911. The Importation into the United States of the Parasites of the 

 Gypsy Moth and the Brown-Tail Moth. U. S. Dept. Agr. Bur. F.nt. 

 Bui. 91, 344 p. ~4 fig., 28 pi. (partly col., incl. 4 fold maps). Literature 

 cited p. 21. 



(25 i WEBSTER, F. M. 



1915. The Hessian Fly. I'. S. Dept. Agr. Farm. Bui. 640, 20 p., 1~ riu. 

 Literature cited p. 14-15. 



(26) VIERECK, H. L. 



1916. Hymenoptera of Connecticut. Conn. State Geol. Nat. Hist. Surv. 

 Bui. 22, v. 3, 824 p., 15 fig., 10 pi. Literature cited p. 536-537. 



(27) MYERS, P. R. 



1917. A New American Parasite of the Hessian Fly. Proc. U. S. Nar. 

 Mus. v. 53, p. 255-257, sep. no. 2204. 



(28) WALTON, W. R. 



1920. The Hessian Fly and How to Prevent Losses From it. U. S. Dept. 



\gr. Farm. Bui. 1083, 16 p., 13 fig. Literature cited p. 12. 

 i 2V i FOUTS, R. M. 



1920. Some New Parasites, with Remarks on the Genus Platygaster 

 (Hymenoptera). In Proc. Ent. Soc. Wash., v. 22, MM. 4, p. 61 ~2. 



CALOPTERYX MACULATA BEAUVOIS. 

 AN INTERESTING PHOTOGRAPH. 



Bv W. |. HOLLAND. 



Through the kindness of one of my correspondents, Mr. 

 Fred H. Beer of Pittsburgh, I have been put in possession of a 

 photograph, showing the male and female of Calopteryx niaculata 

 Beauvois /';/ copula. So far as I am now aware this is the first 

 time that a good photograph of this common species engaged 

 in the act of coition has been secured. References to the matter 

 are common enough in the literature of the subject and there 

 are a few drawings and cuts which are available, but no actual 

 photographs, unless I am greatly mistaken. In the Pro- 

 ceedings of the t'nited States National Museum, Volume 

 XLIX, pp. 259 el seq., Dr. Charles H. Kennedy in his paper, 

 entitled "Notes on the Life History and F.cology of the Dragon- 

 Mies (Odonata) of Washington and Oregon," unves some druu 



