Ct. H, F. Nutt all 
85 
died two weeks later. The wound was but slightly noticeable, but 
a considerable amount of clear serum exuded from the puncture. On the 
21st the puncture appeared patulous, reddened, and a circular area of 
oedema, about 3 cm. across, surrounded the bite, the skin itching over 
a surface extending about 7 cm. around the puncture. The itching 
continued, and on the 23rd an area of 4 cm. appeared swollen, darkly 
reddened and hard about a small central scab, the subcutaneous tissues 
being oedematous. This condition persisted for a couple of days, after 
which the swelling gradually subsided, au erythematous eruption 
appeared about the puncture, and there was a good deal of itching 
occasionally. The lint was now removed. As the slight eruption 
subsided, the skin about the bite began to scale all over a circular area 
5 cm. in diameter, and, as the skin grew paler, it appeared yellowish- 
brown as if it had been bruised. Evidently there had been an 
extravasation of blood beneath the skin covering the part where peeling 
occurred. The central puncture appeared dark red. On 9th August 
the skin was yellowish, still peeling, however, and occasionally itching ; 
the central puncture, covered by a scab measuring 2 mm. in diameter, 
was surrounded by thickened indurated tissue. On 18th August the 
skin surface appeared normal, still discoloured beneath ; seat of puncture 
healing. On 19th, 20th and 22nd August the spot itched periodically; 
a slight fresh erythematous eruption appears, which has almost dis¬ 
appeared on 1st September, when there is still occasional itching; the 
seat of puncture red, nodular, the small scab came off exposing a small 
round, shallow ulcer 1'5 mm. broad. On 18. l. 1913 there is still 
a nodule at seat of bite; outwardly healed; slight discolouration 
(yellowish) about the size of a two shilling piece beneath the skin. 
The spot has itched violently several times for a few minutes since 
January 1. 20. ill. 1913 : the area about the seat of the puncture 
still appears slightly discoloured, and the small nodule itches violently 
for a few minutes about twice a week, the itching subsiding after a little 
rubbing with pressure. 
Summary. 
Ixodes putus has to feed three times upon a host, i.e. as a larva, 
nymph and adult. It has proved impossible to raise it upon animals 
under experimental conditions, consequently we do not know how 
long the different stages remain upon the host. The males do not 
attach themselves to the host, they remain in the vicinity of the nests 
of the birds upon which they fed as nymphs and when they emerge 
