42 o 



LIST OF ILLUSTRATIONS. 



PAGE 



Halacarus rhodostigma . . .210 



— notops . . . .211 

 DamEeus auritus, head of . .212 



— — leg of . . . 215 



— — claw of . . . 215 



— geniculatns, young . .215 

 ■ — — mature . . . 215 



Leiosoma ovata, young stage . 217 



Notaspis bipilis, mature . .217 



Oribata punctata, young . .218 



— • globula, mature . . .218 



— — mandible of . .218 

 Pelops acromios, young . .219 



— — mature . . . 219 



— — — leg of . . . 219 

 Notbriis spiniger, young . . 220 



— — claw of . . . 220 



— horridus, mature . . 220 



— — covered with its cloak 



of dirt . . . 220 



Hermannia crassipes, young . 221 



— — mature . . . 221 

 Eremseus tibialis, young . . 222 



— — mature . . . 222 

 Hoplophora contractilis . . 223 



— — shut up . . . 223 



— — leg of . . . 223 



— — larva 01 . . . 224 



— arctata .... 225 

 Ilypoderas brevis . . . . 229 



— — under side . . 229 

 — • lineatus, under side . . 230 



— columbse, under side . 230 



— — on vein of pigeon . . 230 

 Hypopus muscarum . . . 234 



— — lip of . . . . 234 



— filicum . . . . 235 



— arvicola , . . . 236 

 Rhizoglyphus echinopus, young . 238 



— — with young developing 



inside . . . 238 



Hypopus, inside of ditto . . 239 



— removed from ditto . . 239 



Hypopus, with Tyroglyphus mycopha- 



gus emerging from it 242 



— alicola . . . . 250 

 Trichodactylus osmise, leg of . 25 1 



— osmice . . . . 252 



— — 252 



— xylocopse . . . . 253 

 Homopus elephantis . . . 253 



— — mouth of . . . 253 

 Rhizoglyphus, tarsus of . . 256 

 Tyroglyphus, tarsus of . . . 256 

 Rhizoglyphus echinopus, young . 257 



— phylloxerse . . . . 258 



— rostroserratus . . .261 



— — side view . . . 261 



— — mouth of . . . 262 

 — ■ mycophagus . . , 263 



Tyroglyphus siro 



. 268 



— ■ — more magnified . 



. 268 



— longior . 



. 271 



Acarus horridus . 



• 273 



— weekesii . 



. 273 



Tyroglyphus siculus 



. 274 



— malus, under side . 



. 275 



— — side view 



• 275 



Glyciphagus spinipes, mouth of . 276 



— — hair of . . . 276 



— — claw of . . . 276 



— cursor .... 278 



— hippopodos . .. . 279 



— buski .... 280 



— spinipes . . . . 281 



— plumiger . . . 283 



— palmifer, male . . . 284 



— — female . . . 284 

 Cheyletus eruditus, male . . 286 



— mericourti, female . . 289 

 Heteropus ventricosus . . . 290 



— — impregnated female . 290 



— — leg of ditto . . . 290 

 Sarcoptes scabiei, anterior leg 



and sucker . .291 



— — mouth . . . . 291 



