7 
REGENERATION OF THE MOUTHPARTS AND LEGS 
IN TICKS. 
AEGAS PEESICUS, AMBLYOMMA HEBEAEUM 
AND HYALOMMA AEGYPTIUM. 
By GEORGE H. F. NUTTALL, F.R.S. 
(From the Quick Laboratory, University of Cambridge.) 
(With 6 Text-figures.) 
CONTENTS. 
PAGE 
Introduction .......... 7 
Methods ........... 8 
I. Regeneration after amputation of the mouthparts (experimental 
records) . . . . . . . . . 11 
1. Argas persicus (larva, 1st and 2nd nymphs) . . . 11 
2. Amblyomma hebraeum (larva, nymph) . . . .16 
3. Iiyalomma aegyptium (nymph) ..... 17 
II. Regeneration after amputation of the legs (experimental records) 17 
1. Argas persicus (larva and 1st stage nymph) ... 18 
2. Amblyomma hebraeum (larva and nymph) .... 18 
3. Hyalomma aegyptium (nymph) . . . . . 19 
Survey of results obtained . . . . . . . . 19 
Summary and conclusions ........ 23 
INTRODUCTION. 
The only authors who have concerned themselves with regeneration in Ixo- 
doidea are Hindle and Cunliffe 1 , who, at my suggestion, carried out experi¬ 
ments wherein they mutilated the legs of immature Argas persicus and observed 
the effects of various operations upon the development of the limbs in 
succeeding stages. I had laid it down as a part of the programme that these 
authors should also determine if the mouthparts of immature ticks are capable 
of being regenerated, but they confined their attention to the regeneration 
of the legs, it being more difficult to deal with the mouthparts especially in 
small larvae. Ticks are liable to be mutilated in nature by being forcibly 
removed from the host, whereby their mouthparts are subjected at times to 
1 Hindle, E. and Cunliffe, N. (i. 1914). Regeneration in Argas persicus. Parasitology, vi. 353- 
371, 4 text-figures. 
