38 IXODOIDEA, OR TICKS, OF THE UNITED STATES. 



Amblyomma tuberculatum Marx. 



Male. — Shield red-brown, with a narrow silvery stripe each side, 

 slightly above the margin, and connected behind to the silvery spots 

 on the festoons; from behind extend forward a pair of rather broad 

 silvery stripes which nnite somewhat behind the middle and are here 

 connected to the lateral silvery stripes. In some specimens these 

 markings are much less extensive, but the spots on the festoons are 

 always distinct. CaiDitiiliim pale in middle of front, and also a 

 pale spot on the shield just behind the capitulum; palpi pale; legs 

 reddish brown, with tips of joints white; venter pale yellowish 

 brown. The capitulum is large and long, the hind angles rounded; 

 palpi short, the second joint not twice as long as the last. 

 Dorsum very broad in front, hardly one and one-fourth times 

 longer than broad, with many very small punctures, some larger 

 ones near the anterior angles; surface generally smcoth; no lateral 

 grooves, nor any before the festoons, w^hich are not very strongly 

 marked. Legs large and long, hairs and tubercles below, but no spurs 

 at tips of metatarsi ; the tarsi are very short ; coxse with two flattened 

 tubercles, except IV, which has only one. Stigmal plate (PL VI, 

 fig. 8) elongate, end tapering and upturned, with extremely minute 

 granules. 



Length of male, 5.5 to 6 mm. 



Female. — Reddish brown, shield with a large silvery mark each 

 side, containing one or two dark spots, and tw^o divaricate silvery 

 stripes extending forward from the hind margin, and sometimes con- 

 nected to the lateral spots ; capitulum paler in front and middle than 

 on the sides and behind; palpi pale; legs red-brown, tips of joints 

 whitish; abdomen brownish, sometimes showing black lines. Capit- 

 ulum (PI. VI, fig. 8) large and long, hind angles rounded; porose 

 areas rather small, elongate, well separated, and directed forward; 

 palpi short, second joint not twice as long as last; shield pentagonal, 

 sides rounded, plainly broader than long, and broadest in front of 

 middle, with many minute punctures, but some larger ones on the 

 anterior lateral lobes; body without hairs, usually shining. Legs 

 large and long, no spurs at tips of metatarsi, but most joints with 

 hair-bearing tubercles below; coxae armed like the male, and just as 

 strongly. Stigmal plates (PI. VI, fig. 8) elongate, of peculiar shape, 

 being longer on inner than on outer side, an elevated smooth boss 

 occupying the outer concave side, the surface with very minute gran- 

 ulations. 



Length of female shield, 3.6 mm. 



Specimens come from various parts of Florida, and are associated 

 with the gopher tortoise. The nymphs have, on the shield, a large 

 silvery spot each side, united behind at tips, and in front much broken 

 by the large punctures. 



