236 LIFE HISTORY OF NORTH AMERICAN TICKS. 
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Rhipicephalus sanguineus, longevity of stages, maximum..................-... 71 
mating habits. os: scces02 ee BeOS 22 2 eledies 28 31 
molting habitssoa canadian sete ae eek 75 
nymph, escripthve.c4: ssh el eee ad 103 
life history. cesses de eee: -aedewiove 107-108 
parasite of dogs... 2: susssiekee seed Ga ganas 43 
periods in life history, maximum and minimum..... 70 
texanus==Rhipwephalus sanguineus......-...-0-+..620s0202---5- 102 
Robin, host of Hamaphysalis leporis-palusiris. . 3... 2.-254ie sae seat e ee 90 
Roost, tick-tree,. constructions .22-.) oe -ci5<ese bieeeeiie ss pe ee 61 
Rotation (see also Starvation). 
system against Pacific Coast tick s.2- 2 Sees eee ee 190 
fiekes 7. 2 Alay. dese eseeyeneeteeh ta ee oe 44 
impractical against’Gayenne tick-2232 95.0. - Aiea Se 158 
Lone: Star tick.<.».. e:bsit Gece ben Leelee Be 151 
Sciurus hudsonicus richardsoni, host of Dermacentor venustus...........-.------- 166 
Tpodes bitigtcvsJh. Ge ow icesa. Glhdadkwascnn 82 
Screw-worm fly (see also Chrysomya macellaria). 
ovipositing in wounds caused by Dermacentor nitens......... 203, 204 
Seutum of ticks, definition: < ..222) 2 1.222 Beeps eee SREE ee ee ee 16 
Sheep, host of Amblyomma americanum... 22 esa Fo Se Se eet Seen 143 
tubereulatuinges Sess. ee ee le kt ee 136, 140 
Dermacentor occidentaliseoriss 3.02: cess d bowen: st Se ee 182 
VENUSTNSE: og Ol be 2, he cep i ek ee ose 166 
Trodes: scarp ilarts «<5 2202 sees, ea pon etal ic pli teloe weer cad 17,82 
Margeropus- annulatist so. ites orate Seo A aie be ee ees 112 
mistralissieke 26) eth rte en eee LT, 1s 
Ornithodoros megniniece: << 2535355 ae dee eebery 22 Bearers 62 
Rhipicephalus sanguneus ccs 5. ek pad eG te ee ee 103 
Skunk, host of Amblyomma americanum. 22 ccs <= soos cles daa oe 143 
Dermacentor variabtlis: Dove Sack Matreeb ate: che ate hess ee 191 
Teo des RAGE ono occa lee ey et ey Bi ee ae ene ee ote 82, 83 
Solenopsis geminata. enemy- ot ticks:..).3 ae wat ahs ses toot eck see 42 
Sparrow, host of Hemaphysalis leporis-palustris.......-.-..--+------------+---- 90 
Sparrows, probable enemies of Hemaphysalis leporis-palustris.....-.-.--------- 96 
Spermophile, ‘host of Jrodes hingt2 4. sp seeped eee eee 83 
Spirocheta anserinum, parasite of geese, transmission by Argas miniatus......- 46 
gallinarum, parasite of chickens, transmission by Argas miniatus.. . 46 
parasites of ticks. : sos g5s ce cles See ee a ae 44 
theileri, causing disease of cattle in South Africa, transmission by 
Margaro pus decolorgtuse sss teen ee he eee ee eee ee 11 
Spirochetosis of fowls, transmission by Argas miniatus...............------ 45-46, 60 
Te flerSs. mabe. La ik ee es 45-46 
Spraying against brown doe: tick: ijt... oer eta Se ee by 
ticks: -...... Seen eeeeete | tte i ed ee 8 eee ae 44 
Squirrel, fox, host of Dermacentor parumapertus marginatus............----- 159, 162 
VaMAb UW Se Daas eee ie ii Nel eo iat 191 
DOUG S, 3-1. cee mene eae gs Gate Ss 2 See Ru 175, 176 
ground (see also Citeilus columbianus). 
host. of Dermacentor venustus 5.568 2325-22... oe SS ATA, L727; EG 
host of Amblyomma americanum... .. >) esa eas ee ee 143 
: ‘Dermacentor: variabiliss: 759i) 2). mee eR) ee a ee, Se 195 
VOTVUSTUS 5% 3055 - oa tee bed ie Rey a oe aes ae 173, 175, 176 
