40 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



BIBLIOGRAPHY 



1886 PROVANCHER, L'ABBE LEON. Additions et corrections au volume n 

 de la Faune Entomologique du Canada, traitant des Hymenopteres. 

 Quebec, 1886, p. 156. 



1887 CRESSON, E. T. Synopsis of the Hymenopters of America North 

 of Mexico. Trans. Amer. Ent. Soc., Philadelphia, 1887, supplemental 

 volume, p. 232. 



1888 PROVANCHER, L'ABBE LEON. Add. Faune Canad. Hym. 1888, p. 

 395. 



1893 URICH, F. W. Insect Life. U. S. Dept. Agr., Div. Ent., Washington, 



D. C. vi, p. 197. 

 1898 HOPKINS, A. D. U. S. Dept. of Agr., Div. Ent., Washington, D. C., 



Bui. No. 17, new series, p. 46. 

 1898 DALLE TORRE, C. G. DE. Catalogus Hymenopterorum hucusque 



descriptorum systematicus et synonymicus, Auctore Dr. C. G. de 



Dalle Torre, Professore Oenipotano. Braconidae. Leipzig, iv, p. 15. 

 1901 ASHMEAD, W. H. Ichneumon Flies. Proceedings U. S. National 



Museum, Washington, D. C., xxin,-p. 185. 

 1904 SZEPLIGETI, Gy V. Braconidse. Genera Insectorum publics par P. 



Wytsman, Bruxelles. Fasicule 22, p. 183. 



1910 GAHAN, A. B. Proceedings Entomological Society of Washington, 

 Washington, D. C., xn, p. 189. 



1911 Idem. Aphidiinae of North America. Maryland Agricultural Ex- 

 periment Station, College Park, Md., Bulletin No. 152, pp. 155, 157, 

 159 and 197. 



CHANGES IN THE MOSQUITO-FAUNA OF PANAMA. 



BY FREDERICK KNAB, Bureau of Entomology. 



That the changes in the physical features of the Panama Canal 

 Zone brought about in the course of constructing the interoceanic 

 canal would have a marked effect upon the life of the region has 

 been repeatedly pointed out. It is unfortunate that no thorough 

 study of the Panama fauna was made before radical changes in 

 the character of the country had been brought about, so that 

 their effect on its animal life might be determined. 



The aquatic forms are the ones that must be particularly affected 

 by the topographic changes in the Canal Zone. Streams have 

 been changed in their courses, swamps have been drained and 

 new bodies of water created. The mosquito life of the Canal 

 Zone, with its many species (considerably over 100 are known 

 from the region) and great diversity of breeding habits, must be 

 particularly affected by these changes. Many species of peculiar 

 habits, such as the many forms breeding in the water between 



