198 Genus Ixodes 



squirrel aforementioned, vin. 1910. We have also received a % 

 (N. 678) from Tamias townsendi, Chilliwack, British Columbia 

 (ill. 1900, N. C. Rothschild coll.), a ? (N. 284) from Sciurus sp., La Honda, 

 California (n. 1895, V. L. Kellogg coll.), a ? (N. 715) from ? host, Glacier 

 Bay, Alaska, iv. 1909 (gift of the U.S. Department of Agriculture), and 

 finally a ? from " a mouse, Jeffrey, N.B., C H. McNutt, X. 1908" (sent to 

 us by C. G. Hewitt, Ottawa, Canada, for identification). Neumann (1899) 

 first described the species from 1 $ (mutilated, without complete 

 capitulum and legs) from Neotoma occidentalis, Shoshone Falls, Idaho 

 (coll. Bureau of Animal Industry, Washington, D.C.). Banks (1904) 

 records 2 ?s "from Siskiyou County, California, also received from 

 Massett, British Columbia." 



See further under Notes on Biology (p. 315). 



21. IXODES CALEDONICUS Nuttall, 1910. 



Figs. 191-193. 

 Lit. and Icon. : Nuttall, xn. 1910, pp. 408-411, Figs. 1-3 (reproduced). 



Male : unknown. 



Female (gorged) : Body 7 - 8 x 4 mm., oblong, with sides almost 

 parallel, posterior border broadly rounded, covered with a few short 

 white hairs. Scutum (1*8 x 1 mm.): glossy, sub-oval, longer than broad, 

 emargination slight, cervical grooves beginning as deep pits (giving the 

 effect of sharp scapulae), then deep and distinct for about two-thirds the 

 length, but slightly divergent and fading away toward the postero- 

 lateral borders; no lateral grooves; very fine, uniform punctations, 

 except for a few larger ones along the anterior and antero-lateral 

 borders ; a few very small, short hairs. Capitidum : base sub-rectangular, 

 broader than long, with slightly concave raised and trenchant dorsal 

 ridge continuous with the slight (trenchant) cornua ; porose areas not 

 depressed, large, ovoid, almost confluent. Palps short, far apart basally, 

 converging and rounded distally, with thick internal border and broadly 

 rounded tips, articulations between articles 2 and 3 obsolete; thumb-like 

 in profile ; ventral surface of basis capituli flattened, pentagonal, blunt 

 auriculae protruding laterally; palpal article 1 with ventral angle; hypo- 

 stome inclined ventrally, rounded in front, dentition 2|2, with 8-9 blunt 

 teeth per file, and a narrow unarmed median ridge. Venter: vulva slightly 

 posterior to a line connecting the posterior borders of coxae II ; genital 

 grooves rounded in front, diverging slightly, then sub-parallel, finally 

 diverging slightly to the posterior border ; anal grooves rounding the 



