ILLUSTRATIONS. 



Fig. 211. 

 212. 

 213. 

 214. 

 215. 

 21G. 



217. 

 218. 

 219. 

 220. 

 221. 

 222. 

 223. 



224. 

 225. 



220. 

 227. 

 228. 



229. 

 230. 

 231. 



232. 

 233. 

 234. 

 235. 

 236. 

 237. 

 238. 

 239. 

 240. 



241. 

 242. 

 243. 



244. 

 ! 245. 



' 246. 



247. 



248. 



249. 



250. 



Page. 



Labidostomma cornuta 103 



Labidostomma cornuta: Venter 103 



Pediculoidcs S]}.: Beak and claw... 104 



Pediculoidcs ventricosus: Female ... 104 



Pediculoidcs ventricosus: Male 104 



Pediculoidcs ventricosus: Gravid 



female 105 



Siteroptes carnea and claw 105 



Tarsonemus pallidus 106 



Tarsonemus latu-s: Female 106 



Tarsonemus latus: Male 107 



Tarsonemus sp 107 



Podapolipus sp.: Male and female. . 107 

 Pigmeophorus amcricanus and de- 

 tails 107 



Pigmeophorus amcricanus 108 



Scutacarus americanus, from below, 



and claw 108 



Imparipes sp 108 



Tyroglyphus sp 109 



Hypopus of a Tyroglyphus, from 



below 110 



Histiostoma amcricana 110 



Beak of Histiostoma amcricana Ill 



Leg I, and tip of mandible of His- 

 tiostoma amcricana Ill 



Glyciphagus obesus Ill 



Labidophorus sciurinus: Male 112 



Carpoglyphus passularum: Male. . . 112 



Aleurobius farinac: Details 114 



Tyroglyphus lintneri: Female 114 



Rhizoglyphus rhizophagus 115 



Rhizoglyphus hyacinthi, side view. . 115 



Monieziella s-p.: Female 116 



Monieziella sp.: Mandible and 



venter 117 



Monieziella sp., from San Jose scale. 117 



Histiogaster xylophaga 117 



Trichotarsus xylocopae: Nymph and 



claw 118 



Canestrinia sp. : Female, from below 118 



Hcmisarcoptcs malus: Female 119 



Details of an analgesid 120 



Caroncle of Pterolichus 120 



Leg oi Analgcs 120 



Pterolichus sp. (near delibatus), on 



condor 121 



Hypoderas columbac, a stage of Fal- 



culifer 121 



Fig. 251. 

 252. 

 253. 

 254. 

 255. 

 256. 

 257. 

 258. 

 259. 

 260. 

 261. 



262. 

 263. 

 264. 

 265. 

 266. 

 267. 

 268. 

 269. 



270. 

 271. 

 272. 

 273. 



274. 

 275. 

 276. 

 277. 

 278. 

 279. 



280. 

 281. 

 282. 

 283. 

 284. 

 285. 

 286. 

 287. 

 288. 

 289. 

 290. 

 291, 

 292. 

 293. 

 294, 



Page. 



A lloptes microphaethon and caroncle 123 



Analgcs passerinus: Female 123 



A nalgcs passerinus: Male 124 



Mcgninia tyrrclli 124 



Megninia albidus 124 



Pteronyssus tyrrclli 124 



Allanalgcs gracilepinnatus 125 



Pterodcctes armatus 125 



Rivoltasia bispinosa 126 



Schizocarpus mingaudi: Female 126 



Schizocarpus mingaudi: Male and fe- 

 male 127 



Myocoptes clinging to a hair 127 



Listrophorus validus 128 



Sarcoptes scabei: Male 128 



Sarcoptes scabei: Female 128 



Leg of a Sarcoptes 129 



Sarcoptes in her bmrow, and eggs . . 129 

 Psoroptes communis var. ovis: Male. 130 

 Psoroptes communis var. ovis: Fe- 

 male and caroncle 130 



Chorioptes set if er us 131 



Notoedres muris 131 



Otodectes cynotis: Female 132 



Otodectes cynotis: Tip of male abdo- 

 men, and hind legs 132 



Cnemidocoptes mutans: Female 132 



Cytoleichus nudus 133 



Laminosioptes cysticola 133 



Eriophyes sp., side view 134 



Egg of an Eriophyes in gall 134 



Eriophyes gossypii: Anterior part of 



body 135 



A dimple gall 135 



A capsule gall 135 



A pouch gall 135 



A nail gall 136 



A blister gall 136 



Nail galls of an Eriophyes 136 



Rib galls of an Eriophyes 137 



Section of an erinium on leaf 137 



Round galls of an Eriophyes 138 



Eriophyes vitis 138 



Phyllocoptes sp., side view 139 



Demodex folliculorum 139 



Poroccphalus sp 140 



A tardigrade 140 



Nymphon, a pycnogonid 141 



