1933 ] 
Giant Ticks of Malayan Rhinoceroses 
143 
de la patte posterieure, 0.006 % [m]. Cette espece, dont 
les hanches anterieures ressemblent a celles de 1’Ixode de 
Savigny, a ete prise sur un Rhinoceros dont nous ignorons 
le nom specifique; nous 1’avons dediee a M. de Walckenaer, 
de qui nous tenons l’unique exemplaire que nous en avons 
observe.” The rather crude figure represents the ventral 
side of what appears to be an unengorged female. 
Surmising that Gervais’ type might be preserved at the 
Paris Museum, I wrote to Mr. Marc Andre, who kindly in- 
formed me that none of Gervais’ ticks are in their col- 
lections. Neumann evidently never saw them and I have 
been unable to trace whether or not they are lost. 
I believe, however, that a study of the description and 
figure might help to recognize the species. Turning first 
to the Amblyomma known to occur on Rhinoceroses, 
A. crenatum is ruled out at once by the size, the hind legs 
of that species measuring 11 to 12 mm. in length. On the 
other hand, none of the smaller Rhinoceros ticks could be 
described as having the body “roux-grenat”, all being dis- 
tinctly spotted dorsally. The statement about the color, 
and even more so the comparison of the coxae I with those 
of Ixodes savignyi Gervais, induce me to regard Ixodes 
walckenaerii as based in all probability upon a female 
Hyalomma. 1 Ticks of that genus have been found repeat- 
edly on the African Black Rhinoceros ; and P. Schulze bases 
his Hyalomma planum (1919, Sitzungsber. Ges. Naturf. Fr. 
Berlin, pp. 195 and 196; $ $ ; Tanganyika Territory) on 
ticks taken from this host. Might not H. planum and 
H. ivalckenaerii be one and the same species? 
1 Ixodes savignyi was based upon the common cattle Hyalomma of 
Egypt. According to P. Schulze (1930, Zeitsehr. f. Parasitenk., Ill, 
pt. 1, p. 28). Hyalomma savignyi (Gervais) is the correct name of the 
cattle tick which thus far has been called Hyalomma aegyptium (Lin- 
naeus. 
