126 THE AMERICAN MONTHLY [May 



development is reached in twenty-one days, the fourth 

 pair of legs appear at the first moult when seven days old, 

 and the pairing of the sexes takes place long before either 

 individual has reached its matured stage. 



Some specimens of the ticks which were abundant in 

 Queensland, were sent to England; and in December, 1898, 

 a packet arrived containing ten small bottles in which 

 were a large number of ticks of different gpecies preserv- 

 ed in a 3-per-cent solution of formalin. The labels on the 

 bottles indicated the localities from which these ticks 

 came, and the animals on which they were found. Very 

 few of the cattle ticks collected for study are sufficiently 

 perfect to make good specimens for a collection, the ma- 

 jority having been pulled off of the animals to which they 

 were attached, with the usnal result that the barbed ros- 

 trum has been broked off and left behind. 



Cattle Ticks are those which are the cause of the dread- 

 ed tick fever in cattle, but although these creatures will 

 often attach themselves to, and even mature on other an- 

 imals, such as the horse, the sheep, the kangaroo, their 

 bites never set up fever in either ; they have never been 

 found attached to dogs, and the females are far more nu- 

 merous and larger than the males. The species which in- 

 fest dogs, both the native dingoes and the imported do- 

 mestic dogs, although very numerous, do not seem to 

 cause much inconvenience to the animals ; the males of 

 these are said to largely predominate, and to be larger 

 than the females ; these are especially common in the trop- 

 ical districts of North Queensland. The ''true cattle 

 ticks" are at once distinguished from all other kinds in 

 having white and semi-transparent legs, whereas the 

 others have either red or dark brown legs. This is a pe- 

 culiarity of the Queensland variety. Ten different species 

 of cattle ticks from Natal and Cape Colony, show these 

 legs which are either red, or brown, or banded with these 

 colors. 



