124 LIFE HISTORY OF NORTH AMERICAN TICKS. 
brown, with a somewhat complicated pattern, formed by rather 
broad metallic bands. Female reddish brown, scutum with a large 
silvery mark on each side, containing one or two dark spots, and 
two divaricate, silvery stripes extending forward from the hind 
margin and sometimes connected with the lateral spots. 
Nymph (P1. IX, figs. 2, 3)—Unengorged, 2.25 by 1.5 mm. to 4 by 
2.5mm.; engorged, 7 by 5 by 2.5 mm. to 10 by 6.5 by 4 mm.; capit- 
ulum 0.932 mm. long (from tip of palpi to base of emargination of 
scutum); scutum 1.2 mm. long by 1.6 mm. wide. Unengorged 
nymphs are reddish brown; the scutum has a large silvery spot on 
each side, united behind at the tips and in front much -broken by 
the large punctures. Engorged nymphs are dark gray in color. 
Larva (Pl. TX, fig. 1)—Unengorged, about 1.03 by 0.76 mm.; 
engorged, about 4 by 3 by 1.5 mm. The color unengorged is brown- 
ish yellow, intestines showing through darker; lateral margins of 
the scutum of a pinkish color. The color of the engorged larvee 
varies considerably; partially engorged specimens are usually dull 
gray and those which are fully engorged or nearly so usually have a 
purple color. Larve that have been fully engorged for some time 
have a bluish brown color. 
Egg.—Ellipsoidal, reddish brown, shining, smooth. Maximum 
for 10 eggs measured 0.893 by 0.647 mm.; minimum 0.847 by 0.647 
mm.; average 0.864 by 0.655 mm. 
HOST RELATIONSHIP. 
The adults of this tick have been collected from the gopher tortoise 
only. Experimental attempts to attach them to bovines have 
failed. The nymphs are commonly found on the gopher tortoise 
and have been engorged in experiments upon a bovine. Engorged 
larvee have been collected in large numbers from dogs and rabbits 
and in smaller numbers from cattle and two birds of prey, namely, 
the owl and the hawk. The fact that the bird hosts discovered have 
been birds of prey has suggested the thought that the larve crawled 
to the bird host from the small mammals devoured by them. 
GEOGPAPHICAL DISTRIBUTION. 
(Fig. 8.) 
The type locality of this tick is Crescent City, Fla. ‘The species 
appears to be commonly met with on the peninsula of Florida as far 
north as Hawthorn and it is reported as being rather common in 
southern Alabama. Neumann (1899) reports that there is a male 
in the Paris Museum which was collected in Cuba. 
