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 R. sangui- 
neus. It is probably the 
same as was referred to as 
R. sanguineus in the annual 
report of the Bureau of Ani- 
mal Industry for 1905, page 
30. 
Lounsbury has found five 
species belonging to the 
genus Rhipicephalus that 
transmit African coast fever 
in cattle. The possibility 
€ of the transmission of dis- 
Fig. 4.—Rhipicephalus sp.: Coxe of male and female. ggse by the species we have 
Greatly enlarged (original). : ‘ 
found remains to be inves- 
tigated. 'The following are notes we have made on the life history 
of this form: 
TaBLE X.—Oviposition of Rhipicephalus sp., from dog. 
Period of Period 
First eggs deposited. Oviposition completed. ovi- from 
position. dropping. 
Days. | Days. 
34 | 37 
31 | 37 
25 | 33 
20 29 
20 39 
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 mimimum 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 days, as follows: 
TasBLe XI.—Rate of ne m Sena Sp., Ove dog. 
Number of eBES deposited— 
Total. 
May! Ma; May May! May| May may ey 
May May| May May| May May 
16: sllvas | slS. | Le: | 20. | 
May May May 
1 OB ts Ie La a bY le Se ale ae pd gees 4. | 25. 
| | Se ce 
0| 73 ae 181 Ist 107 eae ho. 70 2 | 20 2) 0 0 0) 1,300 
a Dead. 
