CRUSTACEA INSECTA 269 



in or upon man. Many of the Amphipodous Gammari lead a 

 sort of free parasitic existence, and they are themselves very 

 liable to harbor larval parasites. As regards human parasitism 

 from this source the only records known to me are those quoted 

 below. 



BIBLIOGKAPHY (No. 39) . Banon, " Freshwater Shrimp, or 

 Gamarus pulex (said to have been passed per anum)/' ' Rep. of 

 Path. Soc. of Dublin/ in < Dub. Med. Press/ April 6, p. 351, 

 1864. Bartels, " Gamarus pulex in the Human Subject, with a 

 postscript by Troschel/' trans, by Dr E. P. Wright, from <Ver- 

 handl. des Naturhist. verein. der Preuss. Eheinl. und Westph./ 

 in ' Dubl. Med. Press/ 2nd ser., vol. ix, p. 407, 1864,. Wright, 

 E. P., ' Remarks on Dr Banon's Case' (see Bartels). 



SECTION IY. PART V. INSECTA (Coleoptera, Diptera, 

 Hemiptera, Aphaniptera) . 



Whilst very many flies, bugs, lice, and fleas persecute animals, 

 not a few of them also attack man. Several of the species are 

 genuine parasites, others are semi-parasitic, and others, again, are 

 altogether outside the border-land of parasitism in the ordinary 

 sense of the term. In fact, it becomes difficult to say where 

 the line of parasitism should be drawn. I cannot, however, 

 ignore all notice of the insect tormentors, whether strictly 

 parasitic or not. 



At least fifty different species have been regarded as playing 

 the role of parasitism in man. Amongst the Coleopterous 

 parasites none is more authentic than Slaps mortisaga. At 

 least half a dozen such cases have occurred. Mr Hope's 

 catalogue of insects producing parasitism in man gives three 

 examples of scolechiasis from this source. Sir J. R. Cormack 

 published a fourth case, and I have recorded a fifth. In this 

 instance I received the living larva from Dr Home, of Barnsley, 

 who procured it from an infant eleven weeks old. In my ' Intro- 

 ductory Treatise ' I have alluded to the case of the girl Riordan, 

 who not only passed per anum upwards of 1200 larvae, but also 

 several perfect insects. The case was first reported by Pickells, 

 Thomson, and Bellingham. One of the other authentic cases, 

 in which only a few larvse were present, was recorded by 

 Patterson, of Belfast, and the third case by Bateman. Mr Hope's 



