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American Midland Naturalist Monograph No. 1 



ward mildly suggesting reptilian scales. Short hairs, few in number, present 

 mainly on the posterior and lateral marginal areas. 



Discs. — Moderate in size, superficial or mildly depressed, not conspicuous. 

 On the venter present in lineal arrangement in the peranal, transverse post- 

 anal and median postanal grooves. 



Legs. — Long and slender with their surfaces made irregular by very numer- 

 ous granulations. Subapical dorsal protuberances and dorsal humps absent. 

 Leg hairs numerous and small except on ventral and distal portions of the 

 tarsi where they are larger. Length of female tarsus I, 1.02; metatarsus, 0.72. 

 Length of female tarsus IV, 1.17; metatarsus, 0.96. Length of male tarsus I, 

 0.66; metatarsus, 0.51. Length of male tarsus IV, 0.87; metatarsus, 0.72. 



IE I^Cfe^ 



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Fig. 34. Legs of nymphs, Ornithodoros turicata (Duges) on the left, O. parpen on 

 the right. Leg. numbers indicated by Roman numerals. A, Fourth nymphal stage. 

 B, Third nymphal stage. C, Second nymphal stage. D, First nymphal stage. 



