melanderi 
description and distribution, 82 
key, 67 
melanica 
chromosomes, 39 
courtship, 6 
description and distribution, 95 
eggs, 19 
key, 67 
spermatheca, 36 
variability, 43 
melanissima 
description and distribution, 95 
key, 67 
INDEX. 
melanogaster, 4, 9, 10, 11, 14, 15, 27, 30, 31, 109, 
115, 116, 119-121 
chromosomes, 39 
courtship and mating, 5 
description and distribution, 89-91 
eggs, 19 
genetics, 12-13 
head, 92 
hybrids with simulans, 14, 117-118 
key, 68, 70 
larval mouthparts, 21 
male genitalia, 33, 34 
ovipositor, 32 
puparium, 23, 24 
sex-comb, 44 
spermatheca, 36 
variability, 41-43 
wing, 29 
mentum, 21 
mesonotum, 28 
mesopleura, 28 
mesothorax, 27-28 
metallica 
description and distribution, 73 
key, 68 
metanotum, 28 
metathorax, 27-28 
Metz, C. W., 3, 14, 19, 39, 40, 51, 61, 70, 71, 75, 
79, 83, 97 
metzii 
description and distribution, 78 
key, 68 
mexicana, 106 
Mexico, 114 
Michigan, 111 
Microperiscelis, 107 
Mik, J., 59, 91 
Milichiine, 41, 49 
miniature, 120 
Minnesota, 111 
minuta, 106 
Mississippi, 111 
Missouri, 111 
mites, 17 
Mohr, O. L., 2, 14 
Monocera, 107 
Montana, 109 
Morgan, T. H., 12, 13 
mouth-hook, 21 
Muiaria, 17 
Muller, H. J., 13 
mulleri, 100, 109, 112 
chromosomes, 39 

mulleri, description and distribution, 101 
key, 68, 69 
multipuncta, 103, 106 
Mumetopia, 49 
Musca, 26 
Muscide, 8, 48 
Muscoidea, 48 
mutants, 12, 119 
Mutchler, A. J., 2 
Mutilloptera, 120 
147 
Mycodrosophila, 16, 18, 30, 35, 41, 50, 108, 109, 
113, 114, 115, 116, 132 
description and distribution, 62 
Myodaria, 48 
Nachtsheim, H., 13 
nana 
description and distribution, 87 
key, 68 
Nearctic region, 108-112 
Nebraska, 109 
nebulosa, 54, 71 
chromosomes, 39 
courtship and mating, 6 
description and distribution, 88 
eggs, 19 
key, 68 
spermatheca, 36 
nebulosa (Cladocheata), 39, 54, 71 
nebulosa (Pseudiastata), 55, 109, 112 
neglecta, 106 
nematodes, 17 
Neoleucophenga, 59, 132 
Neotropical region, 108, 112-114 
Neuroctena, 40 
Nevada, 109 
New Hampshire, 109, 111 
New Jersey, 109, 111 
New Mexico, 111 
New York, 109, 111 
New Zealand, 108, 116 
Nicaragua, 114 
Nicotiana, 122 
nigricornis, 106 
nigriventris, 89 
nigropunctata, 99, 100 
nigrosparsa, 44 
Nitidulide, 18 
Nonidez, J. F., 38 
North Carolina, 111 
North Dakota, 109 
Northrop, J. H., 15 
notch, 121 
Noterophila, 132 
Notiphila, 51 
notopleurals, 28 
notopleural suture, 28 
Nova Scotia, 112 
nurse-cells, 38 
nutrition, 15 
obesa (Pseudophortica), 33, 58, 106 
obscura, 20, 109, 114, 120, 121 
chromosomes, 39 
courtship and mating, 7 
description and distribution, 93 
eggs, 19 
key, 68 
mutations, 14 
