84 Causes of Disease. 



Goniodes colchicus, truncatus, chrysocephalus, Lipeurus varia- 

 bilis, Menop. productiim, biseriatum, pheasant. 



Goniodes minor, compar, Lip. bantlus, Colpoceph. longicaudum, 

 Men. lainm, biseriatum, pigeon. 



Docophorus ict erodes, adustus, Lipeurus jejunus, anseris, Trino- 

 ton conspiircatum, continuum, goose. 



Docophorus icterodes, squaUdus, Trinotum luridum, Menopon 

 obscurum, duck. 



Ornithobius bucephalus, swan. 



II. Spiders. (Arachnoida.) 



1 — Mites. Parasites Upon the Skin. 



Demodex sive Acarus folliculorum canis, cati, suis, caprce, ovis, 

 etc. (in the sebaceous glands and hair folHcles). 



Sarcoptes major s. scabiei communis, in and beneath the epi- 

 theHum, in horse, dog, sheep, goat, camel, monkey, man. 

 Sarcoptes minor, cat, rabbit. 

 Dermatocoptes communis, horse, cow and sheep ; also in goats. 



" cuniculi, in ear of rabbit. 



Dcrmatophagus communis, horse, sheep. 



" auricularum felis, cat. 



" " canis, dog. 



" " cuniculi, rabbit. 



Dermatoryctes mutans, fowds, foot itch. 

 Sarcoptes lavis, pigeons and fowds. 

 Epidermoptes bilobafus and bifurcatus, fowls. 

 HarpirhyncJius nidulans, pigeons, in the feather follicles. 

 Hypodcctes columbarum, pigeons, subcutaneous connective tis- 

 sue and body cavities. 



Laminosioptes cysticola, fowls, connective tissue. 

 Cystodites nudus, fowls, pheasants, air spaces, lungs, liver, 

 kidneys. 



Syringophilus bipectinatus, fowls, pigeons. 



'■ uncinatus, peacocks, quills of feathers. 



Analges minor, fowls, quills of feathers. 

 Dimorphus columbce, pigeon. 

 Leptiis autumnalis, dog, man. 



Dermanyssus avium, birds, man, dog. cat, horse, cow (ear). 

 Gamasus ptcropoides, rabbit, mole, field mouse, cow (ear). 

 Cheyletus parasitivorox, rabbit. 



