CLASSIFICATION AND HABITS OF TICKS. 53 
and HH. concinna, but Banks informs us that he has not found the 
latter in this country. He recognizes H. chordeilis Packard as the 
form occurring in the eastern United States. 
A South African species, H. leachi, has been determined by Louns- 
bury to transmit malignant jaundice of dogs. The larva and nymph 
‘both drop from the host to molt. Both engorge quickly, sometimes 
in less than 48 hours from the time they attach; usually, however, 
remaining from 65 to 75 hours. 
RABBIT TICK. 
(Heemaphysalis leporis-palustris Packard). 
Synonym: Gonizxodes rostralis Duges. 
Packard described this species (see figs. 7, 8, and Pl. III, fig. 2) in 
1869 from a female specimen collected at Fort Macon, N. C., on a 
Fig. 8.—Hemapiysalis leporis-palustris: Coxe of 
maleand female. Greatly enlarged (original). 
rabbit, Lepus palustris.. Marx 
reported the species as quite com- 
mon in Kansas, Texas, and Cali- 
Fie. 7.—Hexemaphysalis leporis - palustris: Capit= fornia. Dr. Cooper Curtice has 
ulum and seutum of female, dorsal view. taken an engorged female from a 
oe ahaa horse in Texas, and it has been col- 
lected in Mexico, the host not being given. Neumann mentions an 
engorged iemale in the museum of Paris. labeled ‘from Brazil” and a 
