ILLUSTRATIONS. 



I'LATES. 



Page. 



Plate I. Fig. 1. — Argas miniattii< : leg I 16 



2. — Argas mmiatus: leg IV IH 



3. — Argas brevipes : leg I 16 



4. — Argas brevipes : leg IV 16 



5. — Ornithodoros coriaceus: leg I 16 



6. — Ornithodoros coriaceus : leg IV 16 



7. — Ornithodoros talaje : palpus 16 



8. — Ornithodoros talaje: leg IV 16 



9. — Ornithodoros megnini: palpus 16 



10. — Ornithodoros megnini: leg IV 16 



11. — Ornithodoros megnini: leg I 16 



12. — Ornitlwdoros megnini : tegument 16 



18. — Ornithodoros turicata : tegument 16 



14. — Ornithodoros turicata : palpus 16 



15. — Ornithodoros turicata : leg I 16 



16. — Ornithodoros turicata : leg IV 16 



17. — Ornithodoros talaje : leg I 16 



II. Fig. 1. — Ceratixodes signatus: female shield and coxte 22 



2. — Ceratixodes signatxis: tarsi I and IV -. 22 



3. — Ceratixodes signatus: capitulum of female 22 



4. — Ceratixodes putus: capitulum and palpus of female 22 



5. — Ceratixodes putus: tarsi I and IV 22 



6. — Ceratixodes putus: shield of female 22 



7. — Ceratixodes putus: palpus of male below 22 



8. — Ceratixodes putus: stigmal plate of female 22 



9. — Ixodes ricinus: capitulum and tarsus I of female 22 



10. — Ixodes ricinus: coxte of female 22 



11. — Ixodes scapidarisf: stigmal plate of nymph 22 



12. — Ixodes californicus: female shield and capitulum 22 



13. — Ixodes ricinus: female shield and stigmal plate 22 



14. — Ixodes scapularis: mandible, and coxse I and II 22 



15. — Ixodes scapularis: capitulum, tarsi I and IV, and shield, of 



female; stigmal plate of male 22 



III. Fig. 1. — Ixodes cookei: larva 28 



2. — Ixodes cookei: base of palpus of nymph from l)elo\v 28 



3. — Ixodes cookei: tip of palpus of nymph 28 



4. — Ixodes cookei: capitulum of female 28 



5. — Ixodes cookei: tarsus I 28 



6. — Ixodes cookei: coxa I 28 



7. — Ixodes cookei: stigmal plate of female 28 



8. — Ixodes cookei: shield of female 28 



9. — Ixodes brunneus: capitulum and shield of female 28 



10. — Ixodes mar xi: capitulum, coxse, and shield, of female 28 



