SEVENTEENTH ANNUAL REPORT. 



407 



Genus Ornithodoros ^ Koch, 1844. 



Generic diagnosis. — Argasidse: Body sometimes oval, lateral borders generally 

 straight or almost straight and parallel, occasionally concave; anterior end more or 

 less pointed, the sides diverging from here backward to the insertion of the II pair 



of legs; posterior end rounded. Hood recurved ven- 

 trally, where it is hollowed out to form a so-called 

 "camerostome" with thick edge. Margins of body 

 thick, with undifferentiated tegument. Tegument mam- 

 millated with hemispherical elevations of various 

 designs; on the dorsal surface variable depressions; on 

 the ventral surface more or less constant folds and 

 grooves; two paired longitudinal projecting folds (coxal 

 folds) near median border of coxae, disappearing pos- 

 terior of coxae IV; a pair of similar folds (supercoxal 

 folds) above and lateral of coxae; one transverse preanal 

 furrow; one transverse postanal fur- 

 row; one longitudinal anal groove ex- 

 tending from anus to postanal groove. 

 Eyes present or absent. 



Type species. — 0. Savignyi (Au- 

 douin, 1827) Koch, 1844. 



Fig. 79.— Capitulum of larva of 

 Argasminiatus. Ventral view. 

 Greatly enlarged. Original. 



Neumann cites ten species for 

 this genus. The best-known 

 forms are — 



Ornithodoros Savignyi^ an African form which attacks 

 man and animals and is alleged to produce quite 

 serious effects. 



O. turicata^ an American form (South America, Mex- 

 ico, southern United States) which attacks hogs and man, with 

 alleged occasional fatal results. 



0. Megnini. the spinose ear tick which attacks cattle, horses, asses, 

 dogs, sheep, and man. 



Fig. 80.— Dor?al 

 view of mandi- 

 bles of same. 

 Greatly enlarged. 

 Original. 



^Synonymy and Bibliogeaphy. 



1844: Ornithodoros Koch, 1844, p. 219.— Idem, 1847, pp. 11-12.— FtiRSTENBERG, 1861, 

 p. 208.— Canestrini, 1890, p. 531.— Idem, 1892, p. 582.— Trouessart, 1892, 

 p. 47.— Neumann, 1896, pp. 3, 25-44.— Lounsbury, 1899, p. 240.— Ward, 

 1900a, pp. 196-198.— Idem, 1900b, p. 437.— Salmon & Stiles, 1901, pp. 407- 

 414. [See also Canestrini & Fanzago, 1877, p. 194.] 



1877: Argas {Ornithodoros ) in Murray, 1877, p. 183. 



1878: " Ornithodorus Koch" of Karsch, 1878, p. 321.— Marx, 1892, pp. 233, 234.— 

 Idem, 1895, p. 199.— Osborn, 1896, p. 255.— Morgan, 1899, p. 137. 



1895: RhynchopriumMAnx, 1895, p. 199; type, spinosum. — Osborn, 1896, p. 255. [See 

 also Neumann, 1896, p. 42. ] [Not to be confused with Rhynchoprion Her- 

 mann, 1804, arachnoid; Oken, 1814, dipteron.] 



1899: ''Ornithodorous Koch'' of Morgan, 1899, p. 136. 



