476 



BUEEAU OF AKIMAL IWDUSTSY. 



in back of the eyes near the margin at its origin, very widely separated from the 

 posterior margin where the ridge which it hmits h three to four times as broad and 

 divided into eleven festoons deeply separated and twice as long as broad ; frequently 

 two linear oblique spots, metallic silver, or gold, to green, postero-median of the 

 eyes; tv/o other small symmetrical spots, metallic silver, or gold, to green (after 

 remaining in alcohol) , tangential to postero-marginal shields in front of the marginal 

 groove; other similar spots on the festoons. Eyes large, flat, yellowish to white. 

 Punctations numerous, very fine. Ventral surface yellow ocher provided with fine, 



short, sparse hairs; dorso-submedian porose plates 

 slightly posterior of coxae IV; dark ramifications of 

 the intestine sometimes visible. Genital pore at 

 height of intercoxal space of coxee II and III. Anus 

 slightly in front of posterior quarter of the body. 

 Stigmata large, whitish, elongate, comma-shaped, 

 curved outward; stigmal pore anterior, small. Capit- 

 ulum relatively long (0.9 to 0.96 mm.); base short, 

 broad, postero-lateral angles rounded, not very promi- 

 nent. Mandibles with digit 135 ju long; internal 

 apophysis broad, transverse; external apophysis with 

 two teeth, one terminal very sm.all, the other very 

 strong. Hypostome subspatulate with three rows of 

 teeth on each half, the median rows contiguous. 

 Palpi long, thin, the second article at least tvvdce as 

 long as the third. Legs medium; coxse I bicuspid, 

 lateral spine much longer; coxae II and III provided 

 with a very short and broad spine on their posterior 

 border; coxie IV v^^ith a strong and long spine. Tarsi I nearly four times as long 

 as broad, rather brusquely narrov.^ed near the tip; tarsi II to IV three times as long 

 as broad with two consecutive spurs; puivillum half as long as the hooks. 



Female. — Young: Body slightly more elongate oval than the male, 4.5 mm. long 

 (including capitulum), 3 mm. broad. Scutum triangular in its posterior two-thirds, 

 with posterior angle large and slightly curved, as broad as long (2 mm.); reddish 

 brown with a w^iite or metallic greenish yellow spot (after being in alcohol) in the 

 posterior angle; cervical grooves deep in front, very broad and superficial in their 



Fig. 238; — Ventral yiew of eapitu 

 him of Amhlijomma americanum. 

 Original. 



321.— Wood & Fitz, 1897, p. 346. [See also Neumann, 1897, p. 366, as syn. 

 of Dermacentor americanvs.'] 

 1844: Amblyomma americanum (Linnaeus) Koch, 1844, p. 229. — Idem, 1847, pp. 90,91, 

 pi. XVII, figs. 62, 63.— Neumann, 1899, pp. 201, 204, 209-211, 212.— Ward, 

 1900a, p. 204.— Idem, 1900b, p. 436, fig. 258.— Salmon & Stiles, pp. 474-477, 

 figs. 236-255. 



1844: Amblyomma ohlongogutiatum Koch, 1844, p. 228. — Idem, 1847., p. 83, pi. xv, fig. 



83; from Brazil. [See also Neumann, 1899, p. 209, as syn. ol Amblyomma 

 americanum.'] 



1867: Ixodes unipunctata Tackari), 1867, pp. 66,67 (Pennsylvania), — Eiley, 1887, p. 



745. [See also Neumann, 1899, p. 200, and Wabd, 1900b, p. 436, as syn. of 



Amblyomma americanum.'] 

 1870: Ixodes unipictus Packard" of Vesrill, 1870, p. 118 (lapsus for J. unipunctata) . 

 1877: '^Ixodes americana (Linnaeus) Koch," of Murray, 1877, p. 194. 

 1880: ''Argas americanus de Geer" of Megnin, 1880, p. 134 (in part). 

 1886: Amblyomma Foreli Stoll (1886, p. 21, pi. xii, fig. 3; pi. xiv, fi.g. 3). [See also 



Neumann, 1899, pp. 209, 211, as syn. of Amblyomma americanum.] 

 1892: ''Amblyomma unipunctata'' (Packard) Curtice, 1892b, pp. 226, 228-229, 234.— 



