ILLUSTRATIONS. 



Page. 



Plate III. Fiy. 1 1 .—Ixodes^ hexagonm: coxa- of female 28 



12. — Ixodes diiersifosKtix: capitulum of female - - - 28 



13.— Ixodes hexagonns: capitulum and shield of female 28 



14,— Ixodes dirersifossus: shield, tarsus I, stigmal plate, coxte 



I and II, and tooth heneath rostrum— all of female . . . 28 

 IV. Fig. 1. — Ixodes pratti: shield of female, capitulum of female, tooth 



on rostrum, stigmal plate of female, and coxa 1 32 



2.— Ixodes angustus: cox*, stigmal plate, capitulum, and 



shield, of female •^2 



3.— Ixodes pratti: stigmal plate of nymph 32 



4, — Ixodes pratti: stigmal plate of male, and tarsus 1 32 



5. — Ixodes pratti: hypostome 32 



Q,— Ixodes dentatus: teeth below on rostrum, coxa?, capitu- 

 lum, and shield, of female 32 



7,— Ixodes scidptus: shield and capitulum of female 32 



S.—Hwmapliysalls leporls-palustris: capitulum of male 32 



9. — Ixodes sculptus: coxte of female 32 



10.— Hsemaphysalis leporis-palustrls: tarsus I, capitulum and 



shield, stigmal plate, and coxa I, of female 32 



11.— Hscmapkysalls chordeiUs: shield and capitulum, cox;p I and 



IV, tarsus IV, and stigmal plate, of female 32 



V. Fig. l.—Rhiplcephalus texanus: shield, capitulum, and mandible, 



of female; capitulum and stigmal plate of male 3-4 



2. —Rhiplcephalus texanus: palpus from beneath 34 



3.—Ehiplcephalus texanus: stigmal plate of female, anal plates 



of male, and coxa 1 34 



4. — Rhipicephalus texanus: tarsi I and IV 34 



^.—Margaropus annulatus: stigmal plate of nymph, and coxa 



I of male 34 



Q,—3Iargaropus annulatus: shield, capitulum, and coxa I, of 



female 34 



7.—Margaropus annulatus: tarsus IV of male, stigmal plate of 



female, and shield and capitulum of nymph 34 



VI. Fig. l.—Amhlyommaamericanum: male, and stigmal plate of female. 42 

 2. — Amblyomma americanum: stigmal plate of nymph, and 



tarsus IV - - • ^2 



3.—Ainhhjomma americanum: hypostome, shield, and capitu- 

 lum, of nymph ; stigmal plate of male, and coxa 1 42 



4.—Ambliioinmu americanum: capitulum of female 42 



5,~Amhlyomma maculatum: tarsus IV, and coxae I and I V. . 42 

 Q.—Amhlyomma cajennense: tarsus IV, and mandible of male. 42 

 T ,—Amhlyomma maculatum: tarsus I, and stigmal plate of male . 42 

 ^.—Amblyomma tuherculatum: capitulum of female, stigmal 



plate of male and of female ^^- 



<d,—Amblyomyna macxdatum : stigmal plate of female 42 



IQ.—Amhhjomma maculatum: capitulum of female 42 



VII. Fig. 1.— Amblyomma cajennense: capitulum of female, and stigmal 



j)late of male - ^-^ 



2.— Amblyomma cajennense: stigmal plate and tarsus I of 



female; coxae I and IV of male 42 



2,.—I)ermacentorvariahills: capitulum and stigmal plateof female 



4, — Dermacentor variabilis: capitulum of male 42 



5. — Dermacentor alblptctus: shield of female 42 



G.—Drriiiacentor variabUls: leg I of larva 42 



