Illinois Natural History Survey -6- Identification Notes 3 
Ixodes cookei Packard - on various mammals 
Ixodes dentatus Marx - on rabbits 
Ixodes muris Bishopp and Smith - mostly on mice 
Ixodes scapularis Say - on many mammals and birds 
Ixodes sculptus Neumann - mostly on ground squirrels 
Selected Bibliography 
Bequaert, Js Ce 
1946 The ticks, or Ixodoidea, of the Northeastern United States 
and Eastern Canada. Ent. Amere, 25:73-232 
Cooley, Re Ae 
1938 The genera Dermacentor and Otocentor (Ixodidae) in the 
United States, with studies in variation. Bul. Nat. Inst. 
Health, 171:1-89 
1946 The genera Boophilus, Rhipicephalus, and Haemaphysalis 
(Ixodidae) of the New World. Bul. Nat. Inst. Health 
187:1-54 
Cooley, Re Aw and G. M. Kohls 
1944 The genus Amblyomma (Ixodidae) in the United States. Journ. 
of Parasit. 30:77-111 
1944 The Argasidae of North America, Central America and Ouba. 
Am. Mid. Nat., Monograph No. 1:1-152 
1945 The genus Ixodes in North America. Bul. Nat. Inst. Health, 
184:1-246 
Yeatter, R. E. and D. H, Thompson 
1952 Tularemia, weather, and rabbit populations. Bul. Ill. 
Nat. Hist. Surv. 25(6) 351-382 
Explanation of Figures 
abbreviations: BC - base of capitulum; P - palpus 
Fig. 1 - Dorsal aspect of Dermacentor variabilis, female 
Fig. 2 - fore coxa of Dermacentor variabilis, female 
Fig. 3 - fore coxa of Amblyomma americanum, female 

Fig. 4 - capitulum of Boophilus annulatus, female 
Fig. 5 - capitulum of Haemaphysalus leporis-pglustris, female 
Fig. 6 - capitulum of Bhipicephglus sanguineus, nymph 
Fig. 7 - capitulum of Dermacentor varjabilis, nymph 
