Bishopp — Some New North American Ixodidss. 199 



Legs moderately long and stout, reddish brown, somewhat punctate; 

 coxae I with a basal spine of medium length, shorter than in I. cookei ; 

 all coxae with minute apical teeth. 



Stigma] plates nearly round, 330m wide by 301 m long; about 135 gob- 

 lets, of medium size, closer together and more uniform in size than in 

 female; about seven rows between macula and marginal cells at widest 

 point; macula broadly oval, located ventro-anteriorly from center; adis- 

 tinct depression running around macula on antero-ventral side; marginal 

 cells circular, smaller than in female. 



Body with marginal strip on dorsum, somewhat lighter than scutum; 

 finely punctate and with many very short yellow hairs; venter dark 

 In-own somewhat mottled with light brown, punctate over its entire sur- 

 face ; the chitinized plates exceedingly closely covered with very large 

 punctures and with a few very short hairs; edges of post-genital plate 

 rugose; anal groove straight (transverse) in front of anus; length of this 

 portion of groove 215 /x, length of anal frame 932 y. ; sides of anal frame 

 slightly curved and strongly divergent behind anus. 



Type, Cat. No. 13,973, U. S. National Museum. 



Type host. — Dog. 



Type locality — Tiller, Oregon. 



Described from a female and male of a lot of two females and six 

 nymphs (one of which was engorged and molted to a male) collected 

 March 28, 1910, by Mr. S. S. Stevens. Dallas Ace. No. 1316. 



The collection of the Bureau of Entomology at Dallas, Texas, contains 

 the following lots of specimens, taken on dogs, which are referred to this 

 variety : 



Two 9, Beatrice, Cal., March 2, 1910 (J. Sawyer); 1 9 and 2 nymphs, 

 Hemlock, Oregon, March 28, 1910 (Chas. Desmond); 4 ?,1 nymph, 1 

 larva, March 27, 1910; 5 9, 4 nymphs, May 5, 1910; 1 ?, May 23, 1910; 

 1 $, July 1, li)10; 1 ?, 1 nymph, November 29, 1910; 10 nymphs, De- 

 cember i), 1910; all from Pysht, Washington, collected by Mr. Guy 

 Decker; 19,9 nymphs, Sightly, Washington, September 21, 1910 (B. A. 

 Bruce) ; the series of females shows but slight variations from the type. 

 In some, the punctures over the entire scutum are more or less confluent, 

 making the surface longitudinally rugose. In some, the capitulum and 

 palpi are more distinctly roughened than in the type. 



The females of this variety are separated from those of I. cookei proper 

 by the porose areas being as long as broad, more triangular in outline, 

 and somewhat closer together ; also by the roughened capitulum and 

 shield. The latter is rather less narrowed behind the middle than in 

 cookei. 



The male is easily distinguished from the males of cookei and other 

 species by the large punctures which closely cover almost the entire body 

 and scutum. As compared with I. cookei, the male is darker in color, 

 sides of body more nearly parallel, basal spines on coxae I shorter, and 

 stigmal plates slightly smaller. 



