SEVEI^TEENTH ANNUAL EEPORT. 



475 



80o Scutum pentagonal, punctaiions equal (Spain) A. duh'datum. 



Scutum cordiform, punctations larger in anterior angles 81 



81. Scutum large (4 to 5 mm.); lateral copper-colored spots A. tubercalatum. 



Scutum median {2.6 mm. or less) 82 



82. Hypostome with six rows of denticles 83 



Ilypostome tvith eight roivs of denticles; a tubercle on coxpe III and IV (Viti-Levou 



Islands) A. acuta ngidatum. 



83. Coxx III and IVvnth one tubercle each (Central and South America) . A. scutcdum. 

 Coxae HI and IV with two tubercles mc/i( South America) A. Gdldii. 



84. Scutum cordiform {5.5 mm. broad); tarsi gradually narrowed (Zanzibar) . A. aureum. 

 Scutum triangular, S to 4 "inm. broad 85 



85. Eyes toward anterior third of scidum (Cochin China, Java, Borneo) 



A. testudinarium. 



Eyes toward anterior fourth of scutum (Africa) A. devium. 



86. Scutum oval, ^yunctations numerous on entire surface (Trinidad) A. giganteum. 



Scutum lozenge shaped, punctations rare in the middle {Nymjjh) (Trinidad) .A. avlcola. 



87. Scutum triangidar, deep broion (Africa, Guadeloupe, Guatemala).. A. variegatum. 

 Scutum cordiform, yelloivish vjhite (Cape of Good Hope) A. sylvcdicum. 



The Lone Star Tick {Amblyomma americanum) 

 (Figures 236-255.) 



Specific diagnosis. — Amblyomma: Male. — Body oval, much enlarged caudad, brown 

 red, lighter on the marginal ridge; 3 to 3.5 mm. long (capitulum included) , 2.5 mm., 

 broad. Scutum somewhat convex; cervical grooves not very deep, prolonged back- 

 ward by a superficial depression; marginal grooves narrow, commencing a little 



Synonymy and Bibliography. 



1758: Acarus ' americanus Linn.5:us, 1758, p. 615; 1760, p. 615 [Acarus ovalis planus ^ 

 macula dorsali aZ&a Kalm, 1754, p. 20, from Pennsylvania and New Jersey]. — 

 Fabricius, 1794, p. 428.— Jordens, 1801, pp. 195-198, Tab. vii, figs. 10-13. 

 [Not Acarus americanus, A. nigua, from Brazil, of Treviranus, 1831, pp. 

 185-191, Taf. XV, xvi.] [Renamed Acarus nigua by De Geer, 1778, p. 154.} 

 [See also Latreille, 1804, p. 52, as syn, of Ixodes nigua. — Idem, 1829, p. 

 288.— Gervais & VAN Beneden, 1859, p. 461.— Siebold, 1850, p. 659 (pars). — 

 Moquin-Tandon, 1861, p. 303.] [See also Fabricius, 1805, p. 356, as syn. 

 of Ixodes americanus. 1 [See also Neumann, 1897, p. 365, as syn. of Derma- 

 centor americanus.^ [See also Dunglison, 1900, p. 7, as syn. of ^^Pulex 

 penetrans. ' ' ] 



1778: Acarus nigua De Geer, 1778, pp. 153-160, pi. xxxvii, figs. 7-13. Acajms ameri- 

 canus Linnseus, renamed. [Not '^Acarus nigua' ^ of Treviranus, 1831.] 

 [See also Latreille, 1829, p. 288.] [See also Moquin-Tandon, 1861, p. 303, 

 and Murray, 1877, p. 194, as syn. of Ixodes arnericana.} [See also Railliet, 

 1893, pp. 7-14; Neumann, 1897, p. 365, as syn. of Bermacentor americanus. '^^ 



1804: Ixodes nigua (De Geer) Latreille, 1804, pp. 52, 53. — Gervais & van Beneden, 

 1859, p. 461.— Moquin-Tandon, 1861, p. 303.— Blanchard, 1890, p. 328. 



1804: Ehynchojrrion omericanum (Linnseus) Hermann (1804, p. — ). [See Fabricius^ 

 1805, p. 356, as syn. of Ixodes americanus. — Gervais, 1844, p. 247.] 



1805: Ixodes americanus (Linnseus) Fabricius, 1805, pp. 355,356. — Illiger, 1807, pp. 



368-370.— Gervais, 1844, pp. 247, 248.— KtiCHENMEisTER, 1855, p. 422, in 

 part.— Milner, 1858, p. 13.— Fitch, 1871, pp. 363-366.— Lintner, 1874, p. 

 631.— CoNiL, 1877, pp. 26, 27.— Braun, 1883, p. 212.— Neumann, 1888, p. 

 95.— Idem, 1892a, p. 100.— Idem, 1892b, p. 103.— The Lancet, 1892, 1, p. 756.— 

 Veterinary Journ., 1892, XXXIV, pp. 336-337.— Mosler & Peiper, 1894, p. 

 11359—01 31 



