Musca sorbens: Also named hill fly, Gray in body.Similar to housefly in shape, but smaller.There are two vertical lines on the back.

• 市蝇：又名山蝇，形态与家蝇相似，但体较小，体色较灰，胸背有纵纹两条，雄蝇这两条纵纹前部分叉。