16 



INTRODUCTION. H- 



ECTOZOA HOMINIS. 



rhthiriiis inrjuinalis, Leach. (Crab-louse.) 



FciUculus capitis, Nitzsch. (Ilead-louse.) 



Vcdiculus i-estimenti, Nitzsch. (Body-louse.) 



Fediculns tahesceniiiim, Burmeistcr. 



Sarcoptes scabiei, Latreille. (Itch-insect.) 



Bemodex folliculorum, Owen. 



Dermanyssus Boryi, Gervais. 



Ixodes americaniis, De Geer. (Tick.) 



Arr/as piersicus, Fischer. 



Fulex irritans, Lin. (Common flea.) 



Fulex penetrans, GmeVm. (Chiggo.) South America. 



Cimex Uctularitis, Lin. (Bed-bug.) 



Oestms hominis, Say. South America. 



ENTOPIIYTA HOMINIS. 



A!i/a of the moutli. 



Achorion Schoideinii, Remak. In porrigo favosa. 



Achorion Lehertii, Robin. In porrigo scutulata. 



Microsporium Audoidni, Gruby. In porrigo decalvans. 



Jlycoderm of Flica Folonica. 



Mycodcrm of Mentagra. 



Mi/coderm of Mugnet. 



Mijcodermata of ulcerated and mucous surfaces. 



Sarcina ventricidi, Goodsir. Stomach. 



Torula'?' Stomach. 



* I once saw a plant of this kind in great abundance mingled with the Sarcina vcntriculi in the liquid 

 ejected from the stomach of a man. 



