SEVENTEENTH ANNUAL REPOET. 



471 



with valvate palpi. Anal groove semicircular, opening cephalad, uniting the sexual 

 grooves; ordinarily no median ano-marginal groove. Scutum often marked with 

 color designs. No anal plates in the male. Stigmata usually triangular, with rounded 

 angles. Nearly always 11 posterior marginal festoons, especially in the male. 

 Type species. — Amblyomma cajennense. 



Neumann has mentioned 86 species of Amhlyom/ma^ some of which 

 are doubtful, and many of which are found on the American continent 

 and adjacent islands. In his key to the genus he gives only three 

 species, namely, A. amerlcmmmj A. niaculatum^ and A. tuherculatum.^ 

 as occurring in the United States, and one species, A. multipunctum^ 

 for North America." Of these, the Lone Star Tick (^1. americanum) 

 is quite common on cattle. 



The following key to the species is translated from Neumann: 



Key to the Specie>s of the Genus Amblyomma. 

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



Mi. _es 1 



Females 47 



A.— Male. 



1. Postero-marginal festoons present 2 



Postero-marginal festoons absent (Africa) ' A. Jilppopotamense. 



2. Marginal groove present 3 



Marginal groove absent 28 



3. Marginal groove extending around the posterior border 4 



Marginal groove not extending around the jwsterior border 24 



4. Eyes flat 5 



Eyes hemispherical, in sockets (Africa, Gaudeloupe, Guatemala)... A. variegatum. 



5. Scutum dark, with or without copper or yellowish white spots. 6 



Scutum light, ivith or without dark designs 20 



6. Scutum without black spot occupying anterior third 7 



Scutum black in anterior third ( Port Natal) A. annulipes. 



7. Coxse I spinose 8 



Coxx I bilobed (Africa) ^1. rugosurn. 



8. Coxse I bicuspid 9 



Coxse I armed with one long spine ^1. inaculatum. 



9. Coxse I divided on posterior margin -. 10 



Coxx I divided nearly to anterior margin (Mexico, Paraguay) ..1. ovale. 



109, 110.— Canestrini, 1890, pp. 483, 486, 488.— Marx, 1892, pp. 233, 235.— 

 OsBORN, 1896, p. 261.— Neumann, 1897, p. 325.— Idem, 1899, pp. 107, 108, 109, 

 200-283.— Morgan, 1899, p. 138.— Ward, 1900a, pp. 204, 205.— Idem, 1900b, 

 p. 436. — Salmon & Stiles, 1901, pp. 470-477. [See also Railliet, 1893, p. 

 710, as syn. of Hyalomma. ] 



1844: Hxmalastor Koch, 1844, p. 223; type, longirostris. — Idem, 1847, p. 15. — FtiR- 

 stenberg, 1861, p. 208.— Murray, 1877, pp. 187, 198.— Marx, 1892, pp. 233, 

 235.— Trouessart, 1892, p. 47.— Morgan, 1899, p. 138.— Neumann, 1899, pp. 

 166-180. [See also Canestrini, 1890, pp. 482, 483, 486. ] [See also Neumann, 

 1901, MS., as syn. of Amblyomma.^ 



1863: Ixodes {Amblyomma) Koch in Gerstaecker, 1863, p. 344. ■ 



1863: Ixodes [Hsemalastor) Koch in Gerstaecker, 1863, p. 344. 



1898: " Amblyomnia" of Dalrymple, Morgan, and Dodson, 1898, p. 241 (misprint 

 for Amblyomma) . 



