Gr. H. F. Nuttall 
15 
(c) Operations on second-stage nymphs and their after effects. 
Fifteen second-stage nymphs were operated upon on 29. iv. 1915 after 
feeding on a fowl. The following record relates to ten of these that survived 
and moulted to adults or third-stage nymphs which were subsequently raised 
to adults. 
Nature of operation on 
second-stage nymph 
Palp 
Hypostome 
Argas 
articles 
cut off 
No. 
removed 
at 
Clielicerae Moulted on 
Resultant effect on after stages 
63 
R 2-4 
T. _ 
base 
RandLcutd 18. v. 15 
perfect J. 
65 
JJ 
R and L 2- 
-4 base 
R cut d 18. v. 15 
L _ 
perfect 
67 
R at base 
base 
R cut d 25. v. 15 
A 3rd-stage nymph with palps regener¬ 
L at base 
L cut 
ated, hypostome a toothless spine (fig. 
4 H), digits normal. Refused to feed 
and finally died. 
68 
R 2-4 
base 
RandL — 15. v. 15 
$, normal but for asymmetric emarginate 
L 1-4 
hypostome. Fed 28. v. 
70 
R 2-4 
base 
R and L cut 17. v. 15 
3rd-stage nymph normal but for some¬ 
L 1-4 
- 
what asymmetric emarginate hypo¬ 
stome and rather small teeth on the 
external article of digits. Fed on 28. v. 
74 
R 2-4 
base 
R and L cut d 14. v. 15 
3rd-stage nymph, perfect; fed 3. vi. and 
L 2-4 
moulted 17. vi. as a normal $. 
75 
R 2-4 
base 
R cut 1 l 22. v. 15 
3rd-stage nymph, perfect. 
L 3-4 
L — 
• 
76 
R 2-4 
1/2 
R cut 18. v. 15 
3rd-stage nymph, perfect. 
L 2-4 L — 
Amputations through the basis capituli. 
Three second-stage nymphs had the basis capituli cut across on 29. iv. 15, 
and two survived the operation: 
Argas 
No. Cut across basis capituli 
72 
Cut diagonally from behind one 
Tick 
palp to base of other and 
moulted 
through digits and pieces of 
cheliceral shafts. 
on 19. v. 
73 
Cut midway across its length and 
Tick 
through digits and cheliceral 
moulted 
shafts to thrice the length of 
digit. 
on 25. v. 
After effects on third-stage nymph 
Fed on 28. v. The tick was perfectly formed, 
the external article of the digits was some¬ 
what small. 
Refused to feed 28. v. Its digits were deform¬ 
ed, the hypostome was absent, the palps 
merely represented by small protrusions. It 
survived in this condition until 13. v. 1919 
(i.e. four years unfed) when it was killed and 
preserved. 
