184 Genus Ixodes 



Neumann examined 43 Js and 127 ?s from various mammals in 

 different parts of N. America, and could find no other constant characters 

 distinguishing them from the type. Banks considers that the porose 

 areas of the ? are shorter and less triangular than in the type, but in 

 the specimen we have seen this is not noticeable. 



Neumann (1899, p. 130) re-described /. hexagonus, giving it a long 

 spine on coxa I. Later (1901, p. 283), he divides hexagonus into three 

 varieties : the type, longispinosus and inchoatus. Banks (1908, p. 32), 

 points out that inchoatus had already been named canisuga by Johnston 

 in 1849. We agree with this opinion, but consider the form sufficiently 

 different from hexagonus to deserve specific rank. There remains the 

 question of hexagonus var. longispinosus. Banks (1908, p. 29) has 

 compared Packard's type of J. cookei with Neumann's types of /. 

 hexagonus var. longispinosus, and finds them identical. Dr L. O. Howard 

 has very kindly sent us two alleged $ s of /. cookei from the collection 

 of Marx, identified by Banks. Unfortunately, the two specimens are 

 quite clearly of different species, but one of them is no doubt the form 

 intended. It agrees very closely with the typical European hexagonus, 

 except for the stronger spine of coxa I, and is certainly no more than 

 a variety of hexagonus. Banks is, we believe, correbt in recognizing its 

 identity with Neumann's var. longispinosus, but as Packard's /. cookei 

 has priority, it becomes /. hexagonus var. cookei. 



We therefore have : 



Ixodes hexagonus Leach. 



„ „ var. cookei Packard (Syn. var. longispinosus Neumann). 



„ canisuga Johnston (Syn. hexagonus var. inchoatus Nn.). 



N.B. We are convinced that the /. hexagonus in many collections 

 of ticks will prove, on further examination, to be /. canisuga. 



Neumann, 1901, p. 283, states that "var. longispinosus" was estab- 

 lished by him on the basis of 42 Js and 113 ? s, found on Lutra, Mustela 

 vison, sheep, Texas; Spermophilus; Felis domestica, Maine; fox, Colorado ; 

 weasel, porcupine and marmot (Smithsonian Institution and Bur. Animal 

 Industry, Washington, D.C.). 



Banks, 1908, p. 31, states that specimens from the pocket gopher, 

 Iowa, and Spermophilus, District of Columbia (Hassall coll.), labelled 

 /. hexagonus by Neumann, are referable to cookei. 



We have a % in our collection (N. 717) from Iowa, U.S.A. 

 (ex Marx coll., presented by the U.S. Department of Agriculture), and 

 have determined a % from a dog, Calabogie, Ontario, for Dr C. G. Hewitt, 

 Government Entomologist, Ottawa (R. M. Reid coll., V. 1908). 



