46 NORTH AMERICAN FEVER TICK AND OTHER SPECIES. 
Mitchell informs the writers that he has known this tick to climb 3 
feet from the ground and deposit its eggs in a crevice on the corner of 
a house and in other cases in cracks in the bark of trees at about the 
same height. From the action of specimens confined in nearly verti- 
cal vials he supposes that the species normally climbs some distance 
upward for the purpose of depositing the eggs. 
The nymph and adult are quite different in appearance, so much so 
that Neumann states that he would hesitate to consider the two forms 
as belonging to the same species had he not found a cast skin about a 
female. Marx figured the nymph as a new genus and species, Rhyn- 
choprium spinosum. | 
Stiles and Hassall have described and figured a pupa-like stage of 
this tick. This, however, does not seem tobe a true resting stage, as 
specimens run very actively when removed and placed in boxes. The 
present writers, from live material in hand, are inclined to consider 
the so-called pupa-like stage as merely the engorged larva. 
The longevity of O. megnini seems to be much like that of Argas. A 
specimen collected by the writers in July, 1905, lived to beyond Jan- 
uary 12, 1907, having been kept in a pill box for a year and a half. 
TURICATA TICK. 
(Ornithodoros turicata Duges. ) 
This tick was originally described from Mexico. It attacks man, 
the punctures causing large swellings that remain for several days 
and are followed by severe pain. It has been reported from South 
America on the llama; from the United States, in Florida, on a land 
turtle (Gopherus polyphemus) and in a snake’s burrow, in Texas on 
hogs, and in California. We have a specimen taken at Burnet, Tex. 
In the Canadian Entomologist for 1900, page 20, Lounsbury men- 
tions the possibility of the African species O. savignyi being intro- 
duced and identical with O. turicata. He states, ‘‘ Neumann in his 
monograph does not give extensive ground for separating O. sawignyi 
and O. turicata. In this country [South Africa], natives are known to 
carry the tick unintentionally with their belongings from place to 
place. It might easily have been introduced into America with slaves 
in the last century or earlier, just as negroes returning to Africa are 
said to have introduced here the jigger flea (Sarcopsylla penetrans L.). 
This latter insect continues to spread and is now found as far south as 
Durban, Natal.” 
Family IXODIDZE. 
The members of the family Lxodidx from their structure naturally 
fall into two subfamilies as suggested by Salmon and Stiles. The 
first, Rhipicephalinz, comprises the forms with short, more or less 
conical palpi, represented in this country by the genera Rhipicephalus, 
Margaropus, Hemaphysalis, and Dermacentor; the second, subfamily 
Ixodinx, includes forms with long palpi and is represented in the 
United States by the genera Ixodes, Amblyomma, and Ceratixodes. 
