October, '111 FELT: GALL MIDGE HOSTS 451 



HIBLIOGRAPHY 



1. 1893.— The Orange and Other Citrus Fruits.— W. C. Stubbs and H. A. Morgan, 

 Special Bulletin, La. Exp. Station, Baton Rouge, La. 



2. 1894.— Report of the Entomologist, 1893-94.— H. A. Morgan, Bui. 28, La. 

 Exp. Station, Baton Rouge, La. 



3. 1903.— The Coccidaj of the World.— Mrs. Maria E. Fernald, Press of Car- 

 penter & Moorehou.se, Amherst, Mass. 



4. 1903-1908. — Accessions catalogue, La. State Crop Pest Commission, Baton 

 Rouge, La. 



5. 1908. — A Brief Summary of the More Important Injurious Insects of Louisi- 

 ana.^Wilmon Newell & Arthur H. Rosenfeld. Journ. Ec. Ent., Vol. I, No. 2, p. 

 150-155. 



6. 1910. — Insects Notably Injurious in Louisiana during 1908 and 1909. — Arthur 

 H. Rosenfield, Journ. Ec. Ent., Vol. Ill, No. 2, p. 212-217. 



7. 1910. — Coccidse of Audubon Park, New Orleans, La. — T. C. Barber, Journ. 

 Ec. Ent., Vol. Ill, No. 5, p. 420-425. 



HOSTS AND GALLS OF AMERICAN GALL MIDGES 



By E. P. Felt, Albany, N. Y. 



The following list summarizes our knowledge concerning the food 

 habits of the American gall midges or Itonidse (including certain St. 

 Vincent and other South American forms studied by the writer) 

 and, in connection with the description of species, has proved of great 

 help in determining many representatives of our rich and varied fauna. 

 This list should also prove of service in indicating the more profitable 

 lines for future life history and ecological studies in this group. It 

 will be noted that our knowledge of the midges occurring upon certain 

 plants- is much more extensive than that in relation to others. A por- 

 tion of this discrepancy is evidently due to marked preferences on the 

 part of the insects, while in not a few cases it may be attributed to a 

 lack of study. This is particularly true of the root-inhabiting forms. 

 Potentially, there should be at least one, and frequently several species 

 living at the expense of most of our native plants, while European forms 

 may be introduced from time to time and become well established upon 

 their natural hosts in this country. 



This Hst gives the correct generic reference for the reared species 

 so far as possible. The old generic name of Cecidomyia, with its 

 varied interpretations by earlier writers, is used in this list as a designa- 

 tion for a biological group and applied to species we are imable to refer 

 to any of the more closely defined, modern genera. 



1 Abies balsamea (balsam) 



Subglobular basal swellings of leaves, length 3 mm.. .Cecidomyia balsamicola Lintn. 



