420 



BTIBEAU OF ANIMAL INDUSTRY. 



it will be necessary to look upon any form corresponding to Boophilus 

 as potentially infectious. 



The following key will serve to determine the various forms which 

 come into consideration in connection with this genus: 



Key to the Species of the Genus Boophilus. 

 [For forms reported in the United States, follow Eoman type.] 



1. Fiery red spot anteriorly in middle field of female; male without a tail; number 



of rovjs of denticles unknoivn. Uncertain West Indian species 



Hsemaphysalis rosea, p. 445 

 No such spot reported for female; male with or without tail; 6 to 10 rows 



of denticles on hypostome 2 



2. Hypostome with 6 rows of denticles 3 



Hypostome with 8 rows of denticles , 4 



Hypostome with 10 rows of denticles; male with distinct horny tail. Type . 



locality (Japan) Rhipicephalus caudatus, p. 437 



3. Male with distinct horny tail. The Blue Tick, South Africa B. decoloratus, p. 433 



Male unknown. A doubtful South American form. T^pe Zoca?%, Buenos Aires, p. 445 



4. Mate with distinct horny tail (Australia, India, Venezuela, Cuba, and Porto 



Rico) B. australis, p. 427 



Male without horny tail 5 



5. North American form (porose areas of female not united in median 



line) Boophilus annulatus, p= 420 



North A frican form Ixodes Dugesii misdet. , p. 439 



Caucasus form {porose areas of female united, in median line of capitu- 



lum) Rhipicephalus calcaratus, p. 441 



The North American Texas Fever Tick {Boophilus annulatus).'^ 



(Figures 42-54, 59, 60, 62-64, 68, 151, 153a-b, 154a.) 



Specific diagnosis. — Boophilus: Male. — Body oval, narrowed on front, broadest 

 (1.3 mm.) at stigmal plane, 2.15 to 2.35 mm. long. Scutum reddish brown, covering 

 entire dorsal surface, prolonged in front by two pairs of projections — one pair of 

 more prominent dorso-lateral projections, dorsal of anterior projection of coxje I, and 

 one pair somewhat less prominent and more median, ventro-median of first pair and 

 nearer the neck. Two cervical furrows shallow, extending more or less distinctly to 

 the posterior border; may be somewhat interrupted in the middle; a median furrow 



^ Synonymy and Bibliography. 



1821: Ixodes annulatus ^ay, 1821, pp. 75,76; type host, Cervus virginianus=Cariacus 

 americanus. East Florida. — Gervais, 1847, p. 351. [Given as syn. of Bo- 

 ophilus bovis by Curtice, 1891a, p. 318; 1891b, p. 685; Dolly, 1894, p. 1000.— 

 OsBORN, 1896, p. 257.] [See also Neumann, 1897, p. 407, as syn. of Rhipi- 

 cephalus annulatus. — Stiles & H ass all, 1901, p. 3, as syn. of Boophilus 

 annulatus. ] 



1869: Ixodes bovis Riley, 1869, p. 168, and Riley MS. in Packard, 1869, p. 68; type 

 host. Bos taurus; Missouri. — Veerill, 1870, p. 117, fig. 41. — Packard, 1873, 

 pp. 740, 741.— Lintner, 1874, p. 631.— Murray, 1877, pp. 182, 188, 193, 

 194.— CoBBOLD, 1879, pp. 267, 350, 389.— Johnson, 1884, p. 78.— Beardslee, 

 1884, pp. 84, 85.— Cook, 1888, p. 405.— Neumann, 1888, p. 95.— Idem, 1892a, 

 p. 100.— Idem, 1892b, p. 103.— Riley & Howard, 1889, p. 20.— The Lancet, 

 1892, I, p. 756.— Vet. Journ., 1892, p. 337.— Holland, 1898, p. 96.— Hunt, 

 1898, p. 211. [Given as synonym of Boophilus bovis by Curtice, 1892, p. 



