So I can't figure out what's wrong with these rules I've written, and I've read the documentation several times; what have I missed?

@mob:slime, biome:21, biome:22, biome:23, biome:149, biome:151, weight:20
@mob:stray, biome:12, biome:13, biome:140, weight:15, light:0-0, lightType:sky
@mob:endermite, dim:TheEnd, weight:5, count:1-1