XII LIST OF ILLUSTRATIONS. 



Pa?p. 



Venter of smarts 30 



Egg of Trombidiuyn 30 



Eye of Tromhidhim 31 



Claws of Tromhidium 31 



Leg I of Troiiihidlum 31 



Mandible of Tromhidium 31 



The larva ( LeptuH ) of a Tromhidium 32 



. Tromhidium locustarum, male 32 



Palpus of Tromhidium giganteum 



Paljius of Tro)nhidmm magnificum 



Cxculus americanus 



lAmnochares; venter 



Limnochares; eyes and dorsal plate 



Eylais sj) 



Eye-plate of Eylais 



Arrenurus sp., male 



Arrenus sp. , palpus 



Arrenus sp. , female from below 



Larva of an hydrachna attached to leg of an insect; nymph inside 



Limnesia sp. , jialpus and coxal plates 



Tyrellia circularis 



Venter of lehertia 



Piona sp., and palpus above 



Larva of Fiona 



Atax sp 



Coxal plates of Atax 



Claws of HaJacarus 



Halacarus sp. 



Scajitognathus sp. (after Trouessart) 



Argas miniatus, from below 



Orniihodoros megnini; nymphal form, and details (Marx) 



Boophilus annulatus, female 



Boopliilus annidatus, male 



Larva of Boophilus annulatus 



Stignial plate of Boophilus annulatus 



Claws of Boophilus annidatus 



Egg of Boophilus annulatus _.. 



Dermacentor variahilis, male from below , 



Dermacentor variabilis, shield of female 



Ixodes cruciarius, female, and stigmal plate 



Head of Ixodes 



Leg I of Ixodes 



Amblyomma amcricana, shield of female 



Amhlyomma americana, stigmal plate 



Venter of Gan^asns 



Side view of a Gamasus 



Pteroptus ainericanus 



Venter of Pteroptus 



Dermanyssus galUme 



Dermanyssus gallinie 



Liponyssus americanus 



Liponyssus; anal plate and mandible 



Pneumonyssus simicola, from below 



Larva of Pneumonyssus simicola - 



