Vol. XXIV, pp. 197-208 June 23, 1911 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



SOME NEW NORTH AMERICAN IXODIDAE WITH 

 NOTES ON OTHER SPECIES. 



BY F. C. BISHOPP. 



[Published by permission of the Chief of the Bureau of Entomology.] 



In studying the collections of ticks that have accumulated in 

 the collection of the Dallas Laboratory several new species have 

 been discovered, and in order that the biological notes on these 

 forms to be published later may not contain descriptions of new 

 species these descriptions are presented here. 



I wish to express my sincere thanks to Mr. Nathan Banks for 

 the many helpful suggestions given and for his kindness in 

 placing at my disposal the collection of the Bureau of Ento- 

 mology and of the National Museum, and the collection of the 

 late Doctor Marx, as well as specimens from his private collec- 

 tion. My thanks are also due to Doctor L. 0. Howard and 

 Mr. W. D. Hunter for courtesies extended in the course of my 

 work and to Messrs. G. N. Wolcott and H. P. Wood, the 

 former for making the drawings used in illustrating this paper, 

 the latter for assistance in the rearing of specimens received at 

 the laboratory in the immature stages and in the care of all 

 collected material received by him. 



Ixodes cookei var. rugosus n. var. 



Female. — Capitulum (Fig. 1), length TfiOjU. (from tip of hypostome to a 

 line ilrawn between tips of postero-lateral angles of basis capitnli); basis 

 capituli dark reddish brown, borders almost black, rather wide (560 /O; 

 posterolateral angles not prominent, basal border incurved at center; 

 surface, especially around pnrose areas, roughened; porose areas large, 

 somewhat triangular, reaching very near to posterior margin of basjs 



37— Proc. Biol. Soc. Wash., Vol. XXIV, 1911. (197) 



