. AMBLYOMMA AMERICANUM LINN^US. 41 



It is now rather uncommon in the Eastern States, never as common 

 as Derinacentor variabilis. Fitch wrote in 1870 that although for- 

 merly abundant it had then become nearly extinct, he having seen 

 only one specimen from New York, and that taken forty years before 

 he wrote. He says that it occurs in the Southwest in woodlands, 

 and not in cleared sections. It is often taken from cattle, occasion- 

 ally from horses, hogs, dogs, and goats, once from panther and wolf, 

 sometimes from man, and rarely from any of the small mammals. It 

 is commonly known as the " lone star tick," because of the single 

 yellow spot on shield of female. 



The Aca-ms ameyicanus of Linnseus wa-s taken by the traveler 

 Peter Kalm, in 1754, in Pennsylvania and New Jersey. Its descrip- 

 tion will fit only to that species later described by Packard as Ixodes 

 vnipunctata. Koch correctly identified and figured the species, but 

 Neumann in his " Revision '' considered americaniis to apply to the 

 Derinacentor electus Koch. Later he changed, and used americanus 

 for this species. Fitch correctly identified the species. 



Amblyomma cajennense Fabricius. 



Male. — Pale yellowish or brownish yellow, with several irregular 

 silvery white marks and streaks each side, and a number of brown, 

 often reddish brown, spots, all arranged to form a definite, but com- 

 plex, pattern ; some of the pale spots behind are bordered with brown. 

 Legs and palpi wholly pale yellowish, or greenish yellow, tarsi some- 

 times darker. Capitulum subtriangular, hind angles rounded ; palpi 

 longer than width of the capitulum, the middle joint more than 

 twice as long as the last ; body broad, oval, broadest behind middle, 

 with many rather small, subequal punctures, but with four convex 

 smooth spots each side, and a smooth median streak behind; lateral 

 furrows very distinct, reaching fully up to the eyes; behind are 

 twelve deeply impressed lines, the festoons fully twice as long as 

 broad. Legs rather slender, tarsi long, hind tarsus (PI. VI, fig. 6) 

 with three consecutive teeth below, one at apex; no spurs at tip of 

 any metatarsi, but long hairs below on all joints; coxae I (PI. VII, 

 fig. 2) with two spines, the outer one much the longer, coxae II and 

 III each with a mere tubercle, coxa IV (PI. VII, fig. 2) with a spine 

 about as long as width of the joint. Stigmal plate (PL VII, fig. 1) 

 very long and slender, its surface with many minute granulations. 

 Length of male, 2.7 mm. 



Female. — Yellowish; capitulum with some dark on the margin, 

 shield mostly silvery, with a brown line on each margin reaching 

 back from the eyes ; legs pale greenish yellow, tarsi often dark, espe- 

 cially of legs I and II. Capitulum (PI. VII, fig. 1) much broader 

 than long, hind angles acute ; porose areas nearly circular, and widely 



