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内蒙地区常见的人体皮下蝇蛆病原两种,一为纹皮下蝇 Hypoderma lineatum(De Villers);一为牛皮下蝇 Hypod-erma bovis(Linnaeus)De Geer。二者的二龄幼虫特征相似,人体寄生者较少见,过去描述不全,常影响蛆病病原鉴定。最近瞿氏对纹皮下蝇二龄幼虫作了描述;笔者亦将所获牛皮下蝇二龄幼虫标本描述为下,并与前者进行鉴别,为二种蛆病原诊断提供依据。一、Ⅰ龄幼虫:纹皮下蝇:初孵时虫体为0.55～1.7mm,发育后最大者为17mm。白色。口钩前端尖细。有向后弯曲的尖齿两个。头骨较短呈纺锤形,上端尖下端较钝。咽板骨较宽大。倒二体节有棘刺带,棘刺黑色形为倒置按钉。气门平坦。牛皮下蝇、初孵时虫体为0.6～0.7mm,长大也可达17mm,白色。口钩前端分为两叶状。头骨长纺垂形,两端
Hypoderma lineatum (De Villers), one of the common human subcutaneous myiasis in Inner Mongolia, is Hypoderma lineatum (De Villers) and Hypodor erma bovis (Linnaeus) De Geer. The characteristics of the second instar larvae are similar, human parasites are rare, the past description is incomplete, often affect the identification of myiasis pathogens. Recently, Qu has described the second-instar larvae of the subcutaneous flies; the authors also described the second-instar larvae of the flies as described below and identified them with the former to provide the basis for the diagnosis of the two maggot pathogens. First, the first instar larvae: Musk-footed flies: first hatched worms 0.55 ~ 1.7mm, the largest after development of 17mm. white. Hook hook tip sharp. There are two tines bent backwards. The skull was short spindle-shaped, blunt tip lower tip. Pharyngeal bone plate more generous. Section down the body with thorn spikes, spines black inverted inverted nail. Valve is flat. Under the leather flies, the first hatch when the parasites 0.6 ~ 0.7mm, up to 17mm, white. Hook hook front divided into two leaves. Long skull skull, both ends