52 
NORTH AMERICAN FEVER TK'K AND OTHER SPECIES. 
Theysuggesl the possibility of disease being transmitted by it. The 
specimens in the Bureau of Entomology collection from Nebraska 
were taken on t he beaver. 
mmMkt 
TROPICAL HORSE TI< K. 
Dermacentor nitens Neumann.) 
This species is readily distinguished by the characteristic structure 
>f the stigmal plate. (See PL IV, figs. l,2,andtexi figs. 5 and 6.) By 
collections by Mr. 
J. I). Mitchell from 
the ear- of horses at 
Brownsville and at 
Harlingen,Tex., this 
species has been 
added to the list of 
ticks found in this 
country. The spe- 
cies was described 
b y N e u in a n n i n 
1 897 from specimens 
in the Marx collec- 
tion, locality un- 
Fig. 5.— Dermacentor nitens: Capitulum of female. Greatly enlarged kllOWll, and fl'0111 
specimens from San 
1901 Neumann listed it 
-Dermacentor nitens: Capitulum of female. Greatly enlarged 
(original). 
Domingo and Jamaica on the horse. In 
from Guatemala, Venezuela, and Porto Rico 
A single specimen, appar- 
ently of this species in the 
oymphal stage, was taken at 
Kerrville, Tex., by Mr. F. C. 
Pratt from a deer skin that 
had been removed in January. 
Genus H^MAPHYSALIS. 
The ticks belonging to this 
genus may be readily recog- 
nized by the presence of con- 
spicuous lateral prolonga- 
tions on the second palpal 
rients. The eyes are ab- 
sent : the coxae of the male 
are all provided with spines, 
thoseof the female with small 
tubercular processes. Neu- 
mann mentions two species from North America. //. leporis-palustris 
Dermacentor nitens: Coxae of male and female. 
I iy enlarged (original i. 
