ILLUSTRATIONS. 



[Roman numerals, in capitals, refer to number of bulletin. 

 ACAEINA. 



Argas americanus, V, pi. iii, fig. 3. 

 Bdellasp., XIV, 104. 

 Boophilus bovis, V, pi. iv, pi. v. 

 Bryobia pratensis, IV, 51. 



larva, IV, 52. 

 Cheyletus sp., XIV, 104. 

 Chorioptes syinbiotes, V, 265. 

 Demodex folliculorum, V, 274. 

 Dermacentor americanus, V, 260. 

 Dermanyssus gallinre, V, 254. 

 Iphis ovalis, XIV, 104. 

 Ixodes ricinus, V, 262. 

 Leptus americana, V, 252. 



irritans, V, 252. 

 Linguatula rhinaria, V, 275. 



serrata stage, V, 275. 

 Myobia musculi, V, 264. 

 Myocoptes musculinus, V, 265. 

 Oppia pilosa, XIV, 102. 

 Oribatellasp., XIV, 102. 

 Oripoda elongata, XIV, 102. 

 Ornithoclorus americanus, V, pi. iii, fig. 2. 

 Pediculoides ventricosus, X, 17; XIV, 103. 

 Psoroptes communis, V, 267. 

 Rhiphistoma leporis, V, 261. 

 Rhynchoprium spinosum, V, pi. iii, fig. 1. 

 Sarcoptes mutans, V, 273. 



side view, V, 273. 

 scabiei, V, 269. 



legs, V, 270. 



mouth parts, V, 270. 



burrow, V, 271. 

 Tetranychus bimaculatus, adult, XXVII, 36. 

 palpus, XXVII, 36. 

 claws, XXVII, 36. 

 Trombidium locustarum, eggs and larva, XXX, 22. 

 larva and adult, XXX, 23. 

 Tyroglyphus longior, IV, 100. 

 siro, IV, 101. 

 sp., XIV, 103. 



