Low氏1858年在日本描述腐蝇属一新种,命名为Muscina angustifrons.Kano氏1956年对本种成蝇及幼虫再次描述,但他对三令幼虫的形态描述的不够详尽。葛氏曾将狹额腐蝇与厩腐蝇的三令幼虫作了比较。我们认为,该幼虫不但与厩腐蝇幼虫相类似,而且与肯腐蝇幼虫的形态更难区别。鉴于此,把狹额腐蝇三令幼虫形态作了详尽的描述,并把以上三种幼虫作一下形态比较。 Low 1858 described a new species of rot in Japan, named Muscina angustifrons. Kano re-described this species of adult fly and larvae in 1956, but he described the morphological description of the trilingual larvae incompletely. Mr. Ge has compared narrow-tailed fly worms with trigeminal larvae of fly worms. We believe that the larvae are not only similar to the larvae of the worm, but also more difficult to distinguish from the larvae of the pupa. In view of this, a detailed description of the morphology of the larvae of the narrow-tailed fly rot was made and a comparison of the three larvae was made.