218 PROCEEDINGS OF THE NATIONAL MUSEUM vol.83 



for the large hooks of T. crassicollis)^ but I find the length of the 

 large hooks of T. taeniaef ortnh (syn., T. crassicoUis) to be 380/x to 

 430/i.; therefore the large hooks of T. laticolUs as estimated from 

 Leuckart's description may be considered to be approximately 380/* 

 to 430/A long. For the small hooks of T. laflcollh Leuckart gave the 

 length from the tip of the handle to the tip of the guard as 128/* 

 and the distance from the tip of the blade to the ti]3 of the guard 

 as only slightly more than the length of the handle (or more than 

 128/*). This provides a basis for determining Leuckart's estimate 

 of the length of the short hooks of T. laticolUs^ but they may also 

 be compared with the small hooks of T . taeniaef ormis^ which I find 

 to be 238/* to 2G0/* long, and these measurements may be taken to 

 represent approximately the length of the small hooks of T . lati- 

 colUs according to Leuckart's description. The length of the short 

 hooks of T. laticolUs^ as estimated from Leuckart's description, is 

 then somewhat more than that given by me, while the measurement 

 I give for the large hooks agrees with that given by Leuckart. One 

 other point of difference remains — the relative length of the blade 

 and handle in the large hooks as described and figured by Leuckart 

 and by me. From Leuckart's description and figures the distance 

 from the tip of the guard to the tip of the handles is found to be 

 239/* and the distance from the tip of the guard to the tip of the 

 blade to be slightly longer than 239/*. In the hooks described by 

 me, the length of the blade, measured as Leuckart measured it, is 

 found to be less than the length of the handle. This difference 

 leaves grounds for contending that the two species are not identical. 

 However, in spite of this difference and the slight difference in the - 

 length of the small hooks, I conclude that the specimens that I exam- |l 

 ined from lynxes in North America are T. laticolUs. 



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