48 
NORTH AMERICAN FEVER TICK AND OTHER SPECIES. 
It may be called the brown dog tick. Our specimens are from nine 
different localities and were all taken on dogs. Unlike Dermacentor 
variabilis, Mr. Mitchell in- 
forms us, this species occurs 
on all parts of the body of 
dogs. Nathan Banks in- 
forms us that this form is 
closely allied to It. sangui- 
neus. It is probably the 
same as was referred to as 
R. sanguim us in the annual 
report of the Bureau of Ani- 
mal Industry for 1905, page 
35. 
Lounsbury lias found live 
species belonging to the 
genus Rhipicephalus that 
transmit African coast fever 
in cattle. The possibility 
of the transmission of dis- 
ease by- the species we have 
found remains to be inves- 
have made on the life history 
Fig. 4. 
Rhipicephalus sp.: Coxae of male and fcmak 
i freatly enlargi <l (original). 
tigated. 
The following are notes we 
of this form : 
Table 
X. 
-0 
[■position of 
Rh 
I"' 1 
( phalli s 
SJ). 
. from 
dog. 
First 
eggs deposited. 
"Ov 
iposition complete d. 
Period of 
ovi- 
position. 
1'eriod 
from 
dropping. 
Apr. 2.. 
Apr. 5.. 
Apr. 7. . 
... May 5... 
Day 
*. 
34 
31 
20 
20 
Days. 
. . . May 5... 
. . . Ma y 1 . . . 
37 
33 
Apr. 8.. 
Apr. 18. 
erage 
... Apr. 27.. 
... May 7... 
29 
39 
A\ 
26 
35 
In the above lot of five ticks collected March 29, as will be seen, the 
maximum period of oviposition was 34 days, the minimum 20, with 
an average of 26. The maximum number of eggs deposited in a lot 
of seven ticks collected July 22 was 1,270, the minimum 91, with an 
average of 636. An engorged tick collected April 30 commenced ovi- 
position May 11, continuing for 12 day-, a- follows: 
Table XL- Rati of oviposition in Rhipicephalus sp., from dog. 
Number of eggs deposited— 
Total. 
May 
L0. 

May 
1.. 
May May 
12. 13. 
17'.i 235 
Mav 
14.' 
18] 
May 
15. 
107 
Hi.' 17.' 
ss los 
May 
lv 
no 
May Mav May 
L9. - 
- 
9 
Mav 
- 

\| j 
24. 
May 
25. 
70 
27 
20 
o 
(«) 
1.209 
a Dead. 
