entomologists’ directory. 23 
Masterman, Elmer E., New London, Ohio. General Entomology. Coll. 
Mattes, Joseph, 229 East 126th St., New York, N. Y. Lepid. Coll. Exch. 
Matthes, Francois E., U. S. Geolog. Survey, Washington, D. C. Colcop- 
tera ; also Hybernation of Insects. Collection. 
Mattoon, Laura I., 103 Mulberry St., Springfield, Mass. Hemiptera. 
Maxwell, A. W., D.D.S., Collinwood, Ohio. Coleop., Lepid. toll. Exch. 
Maynard, C. J., 447 Crafts St., West Newton, Mass. I.cpidoptera. Col- 
lection (West Indian). 
McArdle, R. H., Homer, Mich. General Entomology . Collection. 
McCarthy, Gerald, M. Sc., Raleigh, N. C. Economic Entomology ; 
Anatomy and Embryology of Insects. Collection. Exchange. 
McCartney, Eugene, Boothwyn, Del. Co., Pa. Cotcoptera. Coll. Exch. 
McCook, Henry C., D. D., Sc. D., The Manse, 3700 Chestnut St., Phila- 
delphia, Pa. Ants and Spiders. 
McDade, James E., 2536 Kensington Ave., Chicago, 111 . Co/coplera, 
Odona/a. Collection. Exchange. 
McDonald, Rev. Dr., D.Sc., Grafton, North Dakota. Coleoptera, Lepi- 
doptcra. Collection. Exchange. 
McElfresh, Fred. M., Asst. Ent., Oregon Agric. College, Corvallis, Oregon. 
Hemiptera ( Tingitidcs) ; Economic Entomology . Coll. Exch. 
McKay, Joseph, 259 Eighth St., Troy, N. Y. Diplera. Collection. 
McLouth, C. D., 230 Sanford St., Muskegon, Mich. General Entomo- 
logy. Collection. Exchange. 
McNiel, Jerome, Fayetteville, Ark. Orthop . , Mynapoda . Coll. Exch. 
Mechlin, Oscar A., 3020 Cambridge Place, Washington, D. C. Lcpidop- 
tera. Collection. Exchange. 
Medsger, G. E., Leetonia, Ohio. General Entomology. 
Medsger, O. P., Jacobs Creek, Westmoreland Co., Pa. Coleoptera , Lcpi- 
doptera. Collection. 
Meek, Adam, Watertown, N. Y. General Entomology. Coll. Exch. 
Meeker, John W., M. D., 59 Butler St., Brooklyn, N. Y. Coleoptera , 
Lepidoptera. Collection. 
Meitzen, Julius, 525 Linwood St., Brooklyn, N. Y. Coleop. Coll. Exch. 
Melander, A. Leonard, 208 E. Ohio St., Chicago, 111 ., or University of 
Texas, Austin, Texas. Diplera. Collection. Exchange. 
Melzer, James P., Milford, N. H. Lepidoptera. Collection. Exchange. 
Mengel, Levi W., 737 Penn St., Reading, Pa. Lepidoptera ( Rhopalocera ), 
Can offer fine Indian and Central Amer. for Western and North- 
western species. Collection. Exchange. 
Mercer, W. F., 125 E. State St., Ithaca, N. Y. Lepidoptera (develop- 
ment of wings). Collection. Exchange. 
Mercure, J. T., C. S. V., Deaf and Dumb Inst., Ville St. Louis, Montreal, 
Canada. Lepidoptera. Collection. Exchange.*' 
Merrick, Harry D., New Brighton, Pa. Lepidoptera. Coll. Exch. 
Mertz, Mathias, 66 Leonard St., New York, N. Y. Lepid. Coll. Exch. 
Metcalf, Mrs. R. H., Hinsdale, N. II. Coleoptera , Lepidoptera. Coll. 
