Families by number of species

	Family	Species
1.	Syrphidae	358
2.	Tachinidae	313
3.	Muscidae	308
4.	Anthomyiidae	294
5.	Agromyzidae	268
6.	Dolichopodidae	264
7.	Phoridae	220
8.	Empididae	177
9.	Hybotidae	140
10.	Chloropidae	140
11.	Ephydridae	117
12.	Sphaeroceridae	114
13.	Pipunculidae	107
14.	Scathophagidae	87
15.	Sciomyzidae	73
16.	Tephritidae	68
17.	Drosophilidae	66
18.	Sarcophagidae	65
19.	Fanniidae	59
20.	Heleomyzidae	58
21.	Calliphoridae	45
22.	Lonchaeidae	43
23.	Tabanidae	41
24.	Lauxaniidae	39
25.	Asilidae	36
26.	Sepsidae	32
27.	Platypezidae	29
28.	Stratiomyidae	28
29.	Chamaemyiidae	28
30.	Psilidae	26
31.	Conopidae	19
32.	Bombyliidae	19
33.	Piophilidae	18
34.	Ulidiidae	17
35.	Therevidae	17
36.	Rhagionidae	17
37.	Opomyzidae	16
38.	Anthomyzidae	15
39.	Pallopteridae	14
40.	Carnidae	13
41.	Milichiidae	12
42.	Clusiidae	12
43.	Hippoboscidae	10
44.	Diastatidae	10
45.	Oestridae	9
46.	Lonchopteridae	8
47.	Micropezidae	6
48.	Asteiidae	6
49.	Xylophagidae	5
50.	Rhinophoridae	5
51.	Odiniidae	5
52.	Acroceridae	5
53.	Periscelididae	4
54.	Dryomyzidae	4
55.	Chyromyidae	4
56.	Scenopinidae	3
57.	Heteromyzidae	3
58.	Camillidae	3
59.	Acartophthalmidae	3
60.	Strongylophthalmyidae	2
61.	Platystomatidae	2
62.	Phaeomyiidae	2
63.	Nycteribiidae	2
64.	Aulacigastridae	2
65.	Atelestidae	2
66.	Xylomyidae	1
67.	Tethinidae	1
68.	Tanypezidae	1
69.	Rhiniidae	1
70.	Pseudopomyzidae	1
71.	Opetidae	1
72.	Mythicomyiidae	1
73.	Megamerinidae	1
74.	Helcomyzidae	1
75.	Coelopidae	1
76.	Braulidae	1
77.	Athericidae	1
	sum =	3949