57 
ON NEW SPECIES OF IXODIDAE, WITH A NOTE 
ON ABNORMALITIES OBSERVED IN TICKS. 
By CECIL WARBURTON, F.Z.S., and 
GEORGE H. F. NUTTALL, F.R.S. 
(With 26 Text Figures.) 
Since we published our last notes upon new species, a considerable 
number of specimens have reached us from various parts of the world, 
thanks to many gentlemen who have interested themselves in these 
parasites. We propose to group our descriptions of new species according 
to genera as we progress with the diagnoses we are preparing for the 
work on Ticks which we are publishing in conjunction with Messrs 
Cooper and Robinson. We have already described several new species 
of Ixodes and Haemaphysalis and in this paper shall confine our descrip¬ 
tions to species belonging to these genera. Although, more recently, we 
have received many specimens belonging to the genus Ixodes, we have, 
in the majority of instances, been able to refer them to established species, 
but sometimes with great difficulty owing to the meagre description 
given by many authors, and especially to the absence of figures. We 
consider that too much stress cannot be laid upon the necessity of 
illustrative figures accompanying authors’ descriptions of new species for 
a glance at a figure frequently suffices as a means of rapidly identifying 
a species, and for this purpose the simplest text figures are usually amply 
sufficient. 
