58 NORTH AMERICAN FEVER TICK AND OTHER SPECIES. 
taken on dogs, though as yet not a single nymph. This suggests the 
remote possibility that the species may pass from the larval to the 
adult stage at a single molt. 
SCULPTURED TICK. 
(Ixodes sculptus Neumann.) 
This speciés was described in 1904 from a female specimen taken 
with a female 7. ricinus in the Santa Cruz Mountains of California. 
So far as known it had not been taken since until Mr. F. C. Pratt col- 
lected it on prairie dogs at Sherwood, Tex., November 2, 1906. 
More extensive collection will undoubtedly show a wider distribution 
than is now known. 
Genus AMBLYOMMA. 
The species of the genus Amblyomma are distinguished by the 
palpi, which are long and cylindrical. The male has the first and 
fourth cox armed with a long spine; the female has only the first 
cox with a spine, the others with tubercles. As far as known all the 
species drop from the host for each molt. Lounsbury has found 
Amblyomma hebreum to be the transmitter of heartwater in cattle, 
sheep, and goats, and has carefully worked out its life history. . 
The genus is represented in. the United States by four species— 
americanum, cajennense, maculatum, and tuberculatum. A fifth 
species, A. multipunctum, is described by Neumann from two speci- 
mens taken on a tapir and an antelope (Dicranocerus furcatus) in 
‘“‘North America.” These are reported as collected by Donckier. 
As no species of tapir is found north of Nicaragua it seems probable 
that A. multipunctum must have been taken from that section of 
North America. 
TABLE FOR SEPARATING THE SPECIES OF AMBLYOMMA OF THE UNITED STATES. 
(Adapted from Neumann.) 
MALES. 
1. Marginal groove extending around the posterior border..........-..--..--------- 2 
Marginal groove not extending around the posterior border... ...- . 4 A. tuberculatum. 
Bi Come I bictspid). 5523.2 fvd oe 7 oer Se tn ea eas GN 3 
Coxze’l armed: with one long spines. 5-0 ase ee oe ite ae oe ee A, maculatum. 
3. Punctations cf scutum lacking from the triangular projections, flat, radiating on 
posterior hallby- fj. c).cniseian sic pe Ph ee Arete See verake Sel aie te eae A. cajennense. 
Punctations distributed oyer entire surface of scutum......-...-..- A. americanum. 
FEMALES. 
Pe Coxse Tbietspids! oF 8 see tr ee a fe te ee ta S  Selae Sane ee ae 2 
Coxe IT armed with:one:very long spine. S525 oe cba ee toes ees A. maculatum. 
2. Scutum triangular, posterior-lateral borders nearly straight........-..---------- 3 
Scutum cordiform, oval, or pentagonal, posterior-lateral borders convex. 
A. tuberculatum. 
3. Eyes in front of anterior third of scutum................+.-----.-- A, ‘cajennense. 
Eyes at plane of or behind anterior third of scutum.........-...--- A. americanum. 
