O. megnini 71 



ORNITHODOROS MEGNINI (Duges), 1883. 



Figs. 102-112. 



Synon.: Argas megnini Duges, 1883, p. 196. 



" Argas americana Packard " : Townsend, 1893, p. 50. 

 Rhynchoprium spinosum Marx, 1895, p. 199. 

 Omithodoros megnini (Duges) Neumann, 1896, p. 42. 

 The " Spinose Ear Tick " of American authors. 



Lit. and Icon.: Duges, 1883, p. 195 1 .— Megnin, 1885, p. 460, PI. XXI, Figs. 1-8.— 

 Neumann, 1888, p. 96* ; 1892a, p. 101 - ; 1892b, p. 105.— Blanchard, 1890, 

 p. 883 et seq. O.— Railliet, 1895, p. 718.— Townsend, 1893, p. 49.— Dolly, 

 1894, p. 980 2 .— Marx, 1895, p. 195, Figs, la-i, reprinted by Osborn, 1896 

 (p. 255), PI. Ill; Figs. 1 and la reproduced by Salmon and Stiles, 

 1901, and in this book. — Neumann, 1896, p. 42, Fig. 36 (here reprinted). 

 — Ward, 1900 a, p. 199, Fig. 3 (good figures of nymph, dorsal and ventral 

 aspects, but termed " full-grown " adult by author ; agrees very well with 

 Marx's figures). — Stiles and Hassall, 1901, repr. 2 pp. — Salmon and Stiles, 1901, 

 p. 408, PI. LXXIX (coloured, of nymphs and adults (?) natural size and x 2), 

 two figures after Neumann's Fig. 36 ; Fig. 98, integument of nymph ; Figs. 103, 

 105-107 represent the larval capitulum, the "pupa-like stage," the larval tarsus ; 

 the remaining (essential) figures here reprinted. — Simpson, 1901, repr. 7 pp., 

 3 Figs. (2 photographs of spinose nymph, dorsal and ventral aspects ; rough 

 sketch of spiracle, both by S. G. Wheler).— Wheler, 1901, p. 61 ; 1903, p. 49 — 

 Banks, 1904, Fig. 72, after Marx.— Braun, 1906, p. 374. O.— Hooker, 1908 a, 

 pp. 40, 42, 45, 51.— Banks, 1908, p. 17 ; PI. I, Figs. 9-12, palp, legs 4 and 1, 

 integument. 



Adult (Figs. 102, 103) : Body panduriform, slightly attenuated 

 anteriorly ; broadest at legs 2 or 3, constricted behind legs 4, broadly 

 rounded posteriorly ; colour brown to violet or black. Dorsum : sym- 

 metrical depressions, one arciform, longitudinal, from each side of the 

 projection corresponding to the capitulum ; lateral and slightly anterior 

 to this an infundibuliform depression ; posteriorly along the lateral 

 border, a longitudinal groove of variable length, sometimes interrupted ; 

 a median groove occupying the greater length of the posterior half. 

 Venter : pre-anal groove absent ; replaced by a first post-anal groove at 

 a tangent to the anal frame, straight and joining the coxal groove ; the 

 true post-anal groove near posterior border ; a broad median anal groove 

 terminating at this posterior groove. Supra-coxal and coxal folds broad, 



1 Original inaccessible, passages quoted in Salmon and Stiles, 1901, and referred to by 

 Neumann, 1896. 



2 Unimportant, cited in bibliography by Salmon and Stiles, 1901. 



