ILLUSTRATIONS, dia 
Page. 
PruatE XIV. The Rocky Mountain spotted-fever tick, Dermacentor venustus: 
Fig. 1.—‘‘Deposited-out” female with eggs. Fig. 2.—Unen- 
gorged larva. Fig. 3.—‘‘Deposited-out’’ female, frontal view. 
Fig. 4.—Engorged larva. Fig. 5.—Engorged female, dorsal 
view. Fig. 6.—Unengorged female, dorsal view. Fig. 7.— 
Male, dorsal view. Fig. 8—Male, ventral view. Fig. 9.— 
Unengorged female, ventral view ......-........00cseeceeeee 164 
XV. The American dog tick, Dermacentor variabilis: Fig. 1—Unen- 
gorged larva. Fig. 2.—Unengorged nymph (balsam mount). 
Fig. 3.—Engorged nymph about to molt tofemale. Fig. 4.— 
Engorged nymph about to molt to male. Fig. 5.—Male, dorsal 
view (Texas form). Fig. 6—Unengorged female, dorsal view. 
Fig. 7.—Male, dorsal view (Oregon form). Fig. 8.—Unengorged 
female, ventral view. Fig. 9.—Male, ventral view. Fig. 10.— 
Engorged female, dorsal view. Fig. 11.—Engorged female, 
ERUn rao W Meee met Ne une cet UIE e OM tunis ws we a 2 192 
TEXT FIGURES. 
Fia. 1. The fowl tick, Argas miniatus: Distribution in the United States and 
Mapa Oibue West ladies 220.5 ook... occih oe Joe d snes wesc ce eee 48 
2. The spinose ear tick, Ornithodoros megnini: Distribution............. 63 
3. The black-legged tick, Ixodes scapularis: Distribution in the United 
POULIN SIST RSL, SRR SO AAT SUA eRe Oder nr GaN RN ERI AK 78 
4. The rotund tick, I vodes kingi: Distribution in the United States . 84 
5. The rabbit tick, Hxmaphysalis leporis-palustris: Distribution in ihe 
United States ...... Bi aye Relies eielara Sibat. atdjaie SS slide eaetc oars bee 91 
6. The brown dog tick, Rhipicephalus sanguineus: Distribution in the 
Waste iMod eter eiclat capac a exiewisivicleininat nemawcdecssace ke 104 
7. The North American cattle tick, Margaropus annulatus: Distribution 
MIELE) WMC MNS LALERS oe we wean cian tection ee wae weneoes cus ohcces: 113 
8. The gopher-tortoise tick, Amblyomma tuberculatum: Distribution.... 125 
Oo) Phe sopher-tortoise tick: Vesica’biloba. .<.0.9.. 4.60.02. cece beds 127 
10. The Gulf Coast tick, Amblyomma maculatum: Distribution in the 
LUSTRE SSIS ES es 2) At SA pr are |< se eg 137 
11. The lone star tick, Amblyomma americanum: Distribution in the 
MOMs Upstate \raeee mises core otis Matis ccce saa ccle ce eects ce 143 
12. The Cayenne tick, Amblyomma cajennense: Distribution in North and 
Genre MAO M Cia, suelo fesse oes woe es cond tacce eke k GRA hae 153 
13. The rabbit Dermacentor, Dermacentor parumapertus ane Dis- 
REO OUE Rete eee hse ce ene me ee NS 2 Saroja earns 160 
14. The Rocky Mountain spotted-fever tick, Dermacentor venustus: Dis- 
feibunonM une Umibed, StAtOR:.< <<. scacasacteecuceteonsaccue css 167 
15. The Pacific Coast tick, Dermacentor occidentalis: Distribution in the 
(UES SS 1S ENS) pA) AE a ea ee a Moe See 183 
16. The American dog tick, Dermacentor variabilis: Distribution in the 
VORP CINISTES ESTOS eal gia ee a ER. CHE Ie be se 192 
17. The tropical horse tick, Dermacentor nitens: Distribution in North 
MsCRIU AGW OS MUCICH a Sas Genet Maso o ts ccs et coc eeec eocce. 199 
