G. H. F. Nutt ALL 
449 
which the observations were made, which is to be regretted. 
Owing to the numerous data which were lacking I concluded that 
it was desirable to raise the species anew. The foregoing authors 
report as follows: 
R. sanguineus is a three-host tick^, The larvae, which are 
ready to feed 2-3 days after ecdysis^, remain 3-4^, ^ or about 5-8 
days upon the host^; nym-phs remain attached for 5^ or 5-7 days^; 
adults (?s being meant no doubt) remain upon the host for a few 
days to a week or more^, or 8-10 days^. The ds stay u23on the 
host after the $s have dropped off, they readily detach themselves 
from a dead dog and again attack a living animaP. The part of 
the host’s body which is infested by the various stages varies some¬ 
what: thus the larvae are stated to attach themselves anywhere, 
mostly, however, in hairy places where they are not easily found; 
nymphs are found on the body, including places where the skin is 
bare; adults occur especially inside the lobe of the ear, but also 
on the paws, along the back of the neck, although they are 
occasionally found in any position^. CojJulation evidently takes 
place upon the host^. The period of metamorphosis from egg to 
larva is 7-10 days® or 3-4 weeks^^; from larva to nymph it lasts 
8-9^ or 9-10 days®; from nymph to adults it lasts 15 days^ or 
thereabouts®. Oviposition begins 3^ or 2-4 days® after the gorged 
$ has abandoned the host and the process lasts 8 or more days^, 
4-7 days® or is completed in a week®. The replete $ measures 
6-8 mm. in length, and, after abandoning the host, she tends to 
creep upward, in this way she may climb to a height of 15 feet 
above the ground upon the wall of a kennel. She hides herself in 
cracks, her body becoming flattened and it is difficult to draw the 
creature out of her retreat; in this position she lays “some 
thousands” of eggs®. 
Christophers® demonstrated by experiment that nymphs and 
adults descended from females infected with Piropdasma canis, and 
also adults emerging from nymphs w^hich had fed on dogs suffering 
from piroplasmosis, were capable of producing this disease in other 
dogs upon which they were placed.] 
1 Cliristopliers, 1907 a, p. 4. 
- Christopliers, 1907 b, pp. 40-43. 
® Patton and Gragg, 1913, p. (5423 
