vii 
Seab of Hog or the Scale-bearing Itch-mite (Sarcoptes 
BOUL EE: ELC N SUAS Pore ee) etree niet ced ict ap hdceamin doy odes carers 58 
Mange of the Horse ( Sarcoptes scabiet var. @QUt) ccc cee 59 
FREITIOC LSB panes mite rly Riera Lh tans decayed iss 60 
Head-seab of the Sheep (Sarcoptes scabiei var. 0vis).........0.0.. 60 
BSTC Gn ey ease ibeie iets bt cd eee cate Loesiteds nae. 60 
Mange of the Dog ( Sarcoptes scabiei var. CANIS)... cee oe 61 
The Small Itch-mite (Sarcoptes minor Fuerst) oo... 61 
FREDO GOR 9 str F032 ce oeeaseseacep tae tate -vag lide oso e 62 
The Chicken-seab (Sarcoptes mutans Rob. or KKnemidokop- 
pO ETE IE TOL TTS 9 SR On Ap! fe Ps 7 eo Bees 
BOLIC ACR reap EE Ms 30, tse | cou} thee ate Sob vk fed ow coat 64 
2. Skin-eating Itch-mites. ( Psovoptes ) .....:..cccceeesseeeseneseeeeee coees 64 
The Common Mange of the Horse ( Psoroptes communis 
TEN TAG  aIRI gall e heak CER ot Cri eye ON DORE SY ae 65 
The Mange of the Ox ( Psoroptes communis var. bovis ).............. 66 
EQ OUNO CLOG tives dt raachecitestvateas ors toad AMER EAA Cha onde” tise 66 
The Common Sheep-scab ( Psoroptes communis var. ovis).... 66 
SPECS ALT Sciahialh ea eratievain nt by let) Seem BRAS BORO E oe 71 
3. Sucking Itch-mites.( Symbiotes) ( Chorioptes ) 00... rer 
The Foot-mange of the Horse (Symbiotes communis var. 
CACM elie toed od | gti le Wee he) a, 5 eee CMM REESE De er ESTEE | Re SEE BE 76 
The Foot-scab of the Sheep (Symbiotes communis var. 
SHEL Ved Pet ae TAL Sac UR RtILOTs cee ILD NESE, pe scawwenancoseveabed 76 
The Ear Itch-mite of the Dog (Symbiotes auricularum var. 
eS atte vee ee ere Ae ATER AE UME. wahesesssaveseseconds 7 
pAguaCiih tig (Re LAER hae cose Ale oe ee ore ee 77 
ES Pe Cheol) COP a end tae era Tee shyla NAAN ath. feat AIUE be csscdincoosgnasdivanes 78 
C. Harvest-bugs. Jiggers. (Trombiditde) oo... eee 80 
The American Harvest-mite (Leptus americanus Ril. ).. ..... 82 
The Irritating Harvest-mite (Leptus irritans Ril.) 82 
The Harvest-bug of Europe ( Leptus autumnalis Shaw )......... 83 
DOP EE LCS CRO LU STULEN oe roa ns vena sci saces ken tohacice ong chateaues valenonseriocs 84 
The Chicken-mite or ‘‘Tick”’ (Dermanyssus galline Redi. )...... 85 
TROTIO ORS ueeicovn itive "ot syiheg ivecaiss dec tnrmaracnte netsh scesee «ire 86 
ViTECSTY GLP SC gtd Bite a0 cSt Any AREER A ae iS Pty Soc eT DP 7 
PLS LOC TOME EI wee ca hn danse koias cade ace coe nice isdaa@Mbenamannasess nc rh eay- 89 
The Cattle-tick,-( Boophilus, bovis Ril.) cn. ccccsetssseesteesdeseevseseeveseese 91 
PROM GO RE ENT ee lado. cast Picnic SCALIA aacvatce res cetncvoeses 92 
The Common Tick (Dermacentor americanus L. )......0..cccce 92 
Jo MASTS Rellg Taker Weerepe deg 7s 76/71 OM ea a in ee eee eer Se Pore on 94 
The Head-louse of Man ( Pediculis capitis DeGeer).............. 7 
The Body-louse of Man ( Pediculus vestimenti Leach ).............. 99 
The Crab-louse ( Phthirius inguinalis or pubis Leach ) ............ 100 
The Hog-louse ( Haematopinus wrius Nitzsch )...... eee ees 101 
The Horse-louse (Hematopinus asint Linn. )...... ee eee 102 
